Kenneth L. Lichstein, PhD
- Professor of Psychology, Sleep Research Project,
- Department of Psychology, University of Alabama,
- Tuscaloosa, AL, USA
Preventive measures: Good practices in food preparation (particularly preservation) and hygiene; inactivation of bacterial spores in heat-sterilized symptoms 5 days after conception discount 2.5ml xalatan, canned products or inhibition of growth in all other products medicine ball workouts purchase xalatan 2.5 ml otc. Commercial heat pasteurization (vacuum-packed pasteurized products treatment vertigo xalatan 2.5ml cheap, hot smoked products) may not suf? Refrigeration combined with control of salt content and/or acidity will prevent the growth or formation of toxin 5 asa medications discount 2.5 ml xalatan fast delivery. Food and water samples associated with suspect cases must be obtained immediately medications epilepsy buy discount xalatan online, stored in sealed containers and sent to reference laboratories medications 8 rights buy xalatan 2.5 ml amex. Control of patient, contacts and the immediate environment: 1) Report to local health authority: Case report of suspected and con? Sterilize contaminated utensils by boiling or by chlorine disinfection to inactivate any remaining toxin. Those known to have eaten the incriminated food should be purged with cathartics, given gastric lavage and high enemas and kept under close medical observation. Immediate access to an intensive care unit is essential so that respiratory failure, the usual cause of death, can be anticipated and managed promptly. For wound botulism, in addition to antitoxin, the wound should be debrided and/or drainage established, with appropriate antibiotics. Equine botulinum antitoxin is not used because of the hazard of sensitization and anaphylaxis. Antibiotics do not improve the course of the disease, and aminoglycoside antibiotics in particular may worsen it by causing a synergistic neuromuscular blockade. Epidemic measures: Suspicion of a single case of botulism should immediately raise the question of a group outbreak involving a family or others who have shared a common food. Home-preserved foods are the prime suspect until ruled out, although restaurant foods or widely distributed commercially preserved foods are occasionally identi? Recent outbreaks have implicated unusual food items, and even unlikely foods should be considered. Any remaining food may be similarly contaminated; if found, it should be submitted for laboratory examination. Sera, gastric aspirates and stool from patients and (when indicated) from others exposed but not ill should be collected and forwarded immediately to a reference laboratory before administration of antitoxin. International measures: Commercial products may have been distributed widely; international efforts may be required to recover and test implicated foods. Measures in case of deliberate use: There have been attempts to use botulinum toxin as a bioweapon. Although the greatest threat may be aerosol use, the more common threat may be through use in food and drink. The occurrence of even a single case of botulism, especially if there is no obvious source of improperly preserved food, raises the possibility of deliberate use of botulinum toxin. All such cases must be reported immediately so that appropriate investigations can be initiated without delay. Sensible precautions, coupled with strong surveillance and response capacity, constitute the most ef? Such systems and programs will increase the capacity to reduce the burden of foodborne illness and to address the threat of food terrorism. Localized suppurative infections of organs, including liver and spleen, as well as chronic localized infections may occur; subclinical disease has been reported. The disease may last days, months or occasionally a year or more if not adequately treated. Osteoarticular complications occur in 20%?60% of cases; sacroiliitis is the most frequent joint manifestation. Genitourinary involvement is seen in 2%?20% of cases, with orchitis and epididymitis as common manifestations. The case-fatality rate of untreated brucellosis is 2% or less and usually results from endocarditis caused by Brucella melitensis infections. Laboratory diagnosis is through appropriate isolation of the infectious agent from blood, bone marrow or other tissues, or from discharges. Occurrence?Worldwide, especially in Mediterranean countries (Europe and Africa), Middle East, Africa, central Asia, central and South America, India, Mexico. Brucellosis is predominantly an occupational disease of those working with infected animals or their tissues, especially farm workers, veterinarians and abattoir workers; hence it is more frequent among males. Sporadic cases and outbreaks occur among consumers of raw milk and milk products (especially unpasteurized soft cheese) from cows, sheep and goats. Mode of transmission?Contact through breaks in the skin with animal tissues, blood, urine, vaginal discharges, aborted fetuses and especially placentas; ingestion of raw milk and dairy products (unpasteurized cheese) from infected animals. Airborne infection occurs in pens and stables for animals, and for humans in laboratories and abattoirs. A small number of cases have resulted from accidental self-inoculation of strain 19 Brucella vaccine; the same risk is present when Rev-1 vaccine is handled. Methods of control?The control of human brucellosis rests on the elimination of the disease among domestic animals. Preventive measures: 1) Educate the public (especially tourists) regarding the risks associated with drinking untreated milk or eating products made from unpasteurized or otherwise untreated milk. In high-prevalence areas, immunize young goats and sheep with live attenuated Rev-1 strain of B. This must be taken into account when treating human cases of animal vaccine infections, which are otherwise to be treated like other human cases of brucellosis. Tetracycline should preferably be avoided in children under 7 to avoid tooth staining. Relapses occur in about 5% of patients treated with doxycycline and rifampicin and are due to sequestered rather than resistant organisms; patients should be treated again with the original regimen. Epidemic measures: Search for common vehicle of infection, usually raw milk or milk products, especially cheese, from an infected herd. Recall incriminated products; stop production and distribution unless pasteurization is instituted. International measures: Control of domestic animals and animal products in international trade and transport. Measures in the case of deliberate use: Their potential to infect humans and animals through aerosol exposition is such that Brucella species may be used as potent biological weapons. Most lesions are located on the extremities and occur among children living near wetlands in rural tropical environments. Buruli ulcer often starts as a painless nodule or a papule, which eventually ulcerates; other presentations, such as plaques and indurated oedematous lesions, represent a rapidly disseminated form that does not pass through a nodular stage. Bones and joints may be affected by direct spread from an overlying cutaneous lesion of Buruli ulcer or through the blood stream; osteomyelitis due to Mycobacterium ulcerans is being reported with increasing frequency. Longneglected or poorly managed patients usually present with scars sometimes hypertrophic or keloid, with partially healed areas or disabling contractures, especially for lesions that cross joints. Marjolin ulcers (squamous cell carcinoma) may develop in unstable or chronic nonpigmented scars. In experienced hands and in endemic areas, diagnosis can usually be made on clinical grounds. Histopathological features of active disease include the contiguous coagulation necrosis of subcutaneous fat and demonstration of acid-fast bacilli. Mycolactone production varies with the different groups and is maximal in the African strain. Numbers of reported cases have been increasing over the last 25 years, most strikingly in western Africa, where M. In Australia, it has been described not only in humans but also in native animals including the koala (Phascolarctos cinereus), the brushtail and ringtail possum (family Phalangeridae) and the long-footed potoroo (Potorous longipes). There has been a case reported in a domesticated alpaca (Lama pacos); all of these except for those in the potoroo occurred in the focal areas where human cases occurred. Recent evidence suggests that aquatic insects (Naucoridae) may be natural reservoirs and their bite may transmit the disease to humans. Snails belonging to the families of Ampullariidae and Planorbidae could be contaminated after feeding on aquatic plants covered by a bio? Population increases in rural wetlands place increasing populations at risk during manual farming activities. Lack of protected water supplies contributes to dependence on pond water for domestic use. Incubation period?Incubation period is about 2 3 months; anecdotal observations suggest that M. As for tuberculosis, it is believed that only a small proportion of infected people develop the disease. Most, however, are believed to abort the disease in a preclinical stage and others show only small lesions that are rapidly self-healing. Residence or travel to the permanent wetlands of endemic areas, regular contact with the contaminated aquatic environment, and local trauma to the skin are known risk factors. Factors that probably determine the type of disease are dose of agent, depth of inoculation of the agent, host immunological response. Control of patients, contacts and immediate environment: 1) Report to local health authority: Although neither a noti? Antibiotics should be started 1 or 2 days before the initial surgery to minimize M. Clinical improvements will dictate continuation of antibiotherapy or further surgical intervention. Epidemics are very uncommon and call for education, cleanliness, early reporting, and the provision of wound care materials. International measures: Endemic countries should coordinate efforts across borders. Health workers in non-endemic areas must be aware of the disease and its management because of international travel. Less common forms include a typhoid-like syndrome, febrile convulsions, meningeal syndrome; rarely, post-infectious complications include reactive arthritis, febrile convulsions or Guillain-Barre? Diagnosis is based on isolation of the organisms from stools using selective media, reduced oxygen tension and incubation at 43?C (109. Visualization of motile and curved, spiral or S-shaped rods similar to those of Vibrio cholerae by stool phase contrast or dark? Occurrence?These organisms are an important cause of diarrheal illness in all age groups, causing 5%?14% of diarrhea worldwide. In industrialized countries; children under 5 and young adults have the highest incidence of illness. Persons who are immunocompromised show an increased risk for infection and recurrences, more severe symptoms and a greater likelihood of being chronic carriers. Common-source outbreaks have occurred, most often associated with foods, especially undercooked poultry, unpasteurized milk and nonchlorinated water. The largest numbers of sporadic cases in temperate areas occur in the warmer months. Puppies, kittens, other pets, swine, sheep, rodents and birds may also be sources of human infection. Mode of transmission?Ingestion of the organisms in undercooked meat, contaminated food and water, or raw milk; from contact with infected pets (especially puppies and kittens), farm animals or infected infants. Contamination of milk usually occurs from intestinal carrier cattle; people and food can be contaminated from poultry, especially from common cutting boards. Incubation period?Usually 2 to 5 days, with a range of 1?10 days, depending on dose ingested. Period of communicability?Throughout the course of infection; usually several days to several weeks. The temporary carrier state is probably of little epidemiological importance, except for infants and others who are incontinent of stool. Chronic infection of poultry and other animals constitutes the primary source of infection. Susceptibility?Immune mechanisms are not well understood, but lasting immunity to serologically related strains follows infection. Preventive measures: 1) Control and prevention measures at all stages of the foodchain, from agricultural production on the farm to processing, manufacturing and preparation of foods in both commercial establishments and the domestic environment. Use irradiated foods or thoroughly cook all animal foodstuffs, particularly poultry. Avoid common cutting boards and recontamination from uncooked foods within the kitchen after cooking is completed. Comprehensive control programs and hygienic measures (change of boots and clothes; thorough cleaning and disinfection) to prevent spread of organisms in poultry and animal farms. Good slaughtering and handling practices will reduce contamination of carcases and meat products. Puppies and kittens with diarrhea are possible sources of infection; erythromycin may be used to treat their infections, reducing risk of transmission to children. Control of patient, contacts and the immediate environment: 1) Report to local health authority: Obligatory case report in several countries, Class 2 (see Reporting). Exclude symptomatic individuals from food handling or care of people in hospitals, custodial institutions and day care centres; exclude asymptomatic convalescent stool-positive individuals only for those with questionable handwashing habits. In communities with an adequate sewage disposal system, feces can be discharged directly into sewers without preliminary disinfection. The single most valuable laboratory test is microscopic demonstration of pseudohyphae and/or yeast cells in infected tissue or body? Candida (Torulopsis) glabrata is distinguished from other causes of candidiasis by lack of pseudohyphae formation in tissue. Mode of transmission?Contact with secretions or excretions of mouth, skin, vagina and feces, from patients or carriers; by passage from mother to neonate during childbirth; and by endogenous spread. Susceptibility?The frequent isolation of Candida species from sputum, throat, feces and urine in the absence of clinical evidence of infection suggests a low level of pathogenicity or widespread immunity.


Making sure that incoming fsh have circumstances medicine urinary tract infection order xalatan 2.5ml on line, it would be reasonably likely not been harvested from waters that are to expect that symptoms ketosis generic xalatan 2.5ml fast delivery, without proper controls symptoms retinal detachment purchase xalatan online, closed to commercial harvest because of unsafe levels of environmental chemical concentrations of environmental chemical contaminants and pesticides could enter contaminants or pesticides exceeding the process at the receiving step from the federal tolerance or action levels; those species symptoms hepatitis c discount xalatan 2.5ml online. Making sure that incoming fsh have circumstances that would allow you to not been harvested (for commercial conclude that it is not reasonably likely for purposes) from the same waters that unsafe levels of environmental chemical are under a consumption advisory contaminants and pesticides to occur in by a state keratin treatment buy 2.5ml xalatan with mastercard, tribal treatment 6th february xalatan 2.5 ml on-line, territorial, local, or fsh harvested from your area. You should foreign regulatory authority based be guided by the historical occurrence of on a determination by the authority environmental contaminants and pesticides, that fsh harvested from these waters at levels above established tolerance and are reasonably likely to contain action levels, in fsh from the area in which contaminants above the federal your fsh are caught. Note that available from federal, state, tribal, territorial, many consumption advisories are not local, or foreign health or environmental based on such a determination. For aquacultured fsh other than molluscan shellfsh: If you are receiving fsh, other than molluscan shellfsh, from another processor, you would. This hazard should have been fully coupled with appropriate verifcation; controlled by the primary (frst) processor. Such preventive the aquacultural producer, a state, tribal, measures will not be covered in this territorial, local, or foreign authority, guidance document. If the raw material is an aquacultured product Producers Quality Assurance Program); other than molluscan shellfsh, do you have a relationship with the producer that enables you to . If you have such a relationship with for those contaminants that are the producer, then you should identify reasonably likely to be present. Conducting on-farm visits to the are properly tagged or labeled; aquacultural producer to collect and analyze water or fsh samples. Screening incoming molluscan shellfsh for those environmental chemical to ensure that they are supplied by a contaminants and pesticides that licensed harvester (where licensing is are reasonably likely to be present, required by law) or by a certifed dealer. If no such relationship exists with the third-party organization may producer, then you should identify perform tests and monitoring). At the receiving step, you purchases catfsh from producers should exercise one of the following with which the processor has no preventive measures: long-term relationship. The land An aquacultured shrimp processor use reports are updated annually that purchases raw material through and whenever information on the various brokers should receive lot land use change warrants a more by-lot certifcates from the suppliers. The processor should combine this monitoring procedure with this control approach is a control quarterly raw material testing strategy referred to in this chapter for those environmental chemical as Control Strategy Example 3 contaminants and pesticides that are Records of Testing and Monitoring. If the raw material is molluscan shellfsh or wildreasonably likely to be present. At the receiving step, you should through various brokers should exercise the following preventive measures: screen all incoming lots of shrimp for those environmental chemical a. For wild-caught fsh other than contaminants and pesticides that molluscan shellfsh: are reasonably likely to be used in the production area. Example: Example: An aquacultured trout processor that A processor purchases bluefsh directly regularly purchases raw trout from the from the harvester. The processor same producer should obtain a thirdasks the harvester where the fsh were party certifcate, valid for 1 year. The processor should then and pesticides that are reasonably likely compare the harvest area location to be present in farm water may not be with information on closed waters at levels so high that they are reasonably and check the harvesters state likely to result in concentrations in fsh licenses. Elevated concentrations of chemical contaminants this control approach is a control in water can be an indication that they are strategy referred to in this chapter as reasonably likely to be present in the fsh Control Strategy Example 7 Source tissue. The levels of environmental contaminants note that you may select a control strategy that and pesticides in fsh tissue samples that is different from those which are suggested, are reasonably likely to be present may not provided it complies with the requirements of the exceed the established tolerance or action applicable food safety laws and regulations. What pesticides, if any, are used on these crops, how are they applied, and at what. Take the following corrective action to product involved in a critical limit deviation: The certifcate may accompany each lot of incoming Establish a Recordkeeping System. No fsh may be harvested from an area that the results exceed the federal tolerance is under a consumption advisory by a, state, or action level. Take the following corrective action to a product involved in a critical limit deviation: Establish Verifcation Procedures. Water quality standards Establishment of We have placed the following references on numeric criteria for priority toxic pollutants; display in the Division of Dockets Management, states compliance, p. In Water quality standards references it makes available as hyperlinks from handbook: second edition. Unavoidable contaminants in food for human consumption and food-packaging material. The Agency corrected a typographical error appearing in the April 2011 version of this document. These conditions specify be toxic, allergenic, or carcinogenic, and/or may the species for which the drug is approved for use; cause antibiotic resistance in pathogens that indications (disease or other circumstances) for affect humans. Off label use in animals of species not listed on the label; use for indications approved human or animal drugs is permissible (disease or other conditions) not listed on the in certain circumstances. Drugs on the Index label; use at dosage levels, frequencies, or routes of Legally Marketed Unapproved New Animal of administration other than those stated on the Drugs for Minor Species (the Index) may not be label; and deviation from the labeled withdrawal used in food animals except in early nonfood life time. A veterinarian is a person licensed by a stages of food producing minor species in certain state, territory, or foreign government to practice circumstances. Information on the (2) control parasites, (3) affect reproduction and new animal drug approval process and for growth, and (4) provide tranquilization. Relatively few drugs have been and policies pertaining to drugs can be found approved for aquaculture. Additional details on conditions of salmon, trout, and esocids for the control of use. Each is approved for use to control external protozoan parasites (Chilodonella spp. The total fungi of the family Saprolegniaceae on the dose should not exceed 25,000 I. Aquafor Type A Medicated Article Formalin solution Aquafor Type A is supplied by Intervet, Paracide-F Inc. The (salmon and trout), Esocidae (pike), and tolerance level for forfenicol amine (the Percidae (perch). The minimum Fish is approved for use to treat bacterial withdrawal time before harvest is 12 days. This drug is Finquel and Tricaine-S also approved for use to mark skeletal tissue. This drug is approved for vary with indication as follows: for marking use to temporary immobilization of fsh, skeletal tissue in Pacifc salmon, 7 days; for amphibians, and other aquatic cold-blooded disease control in salmonids, 21 days; catfsh, animals. It may be used for treatment Soluble Powder-343 is supplied by Teva not more than 14 days. The tolerance for the control mortality in freshwater-reared for Sulfadimethoxine and ormetoprim in fnfsh eggs due to saprolegniasis; freshwaterthe fesh is 0. The and no tolerance has been set for residues in following list identifes these compounds fsh tissue. The agency reserves the right to Garlic (whole form) take a different position on the use of any or all Used for control of helminth and sea lice of these substances at some time in the future. For example, in the United States, facilities using these substances would still be required to comply with the Magnesium sulfate National Pollutant Discharge Elimination System Used to treat external monogenic trematode requirements. Onion (whole form) Calcium chloride Used to treat external crustacean parasites and to deter sea lice from infesting the external surface Used to increase water calcium concentration of salmonids at all life stages. They should not be used in fsh that Povidone iodine is to be consumed, unless a sponsor obtains an approval or index listing for them. Eggs are immersed in an aqueous Nitroimidazoles; solution of up to 100 ppm for up to 4 hours. None of these drugs and families of drugs Urea and tannic acid has been approved use in fsh. Preventive the following guidance will assist you in measures for the hazard of aquaculture drugs determining whether aquaculture drugs are a used in aquaculture operations and during signifcant hazard at a processing step: live transportation can include: Can unsafe levels of aquaculture drugs that are these preventive measures are ordinarily reasonably likely to occur be eliminated or reduced employed at either the receiving step or the to an acceptable level at this processing step? Preventive measures for the control of Aquaculture drugs should be considered aquaculture drugs used during aquatic a signifcant hazard at any processing step holding. Example: A primary processor of aquacultured these preventive measures are ordinarily catfsh that regularly purchases from applied at the holding step. Such preventive measures will not be monitoring procedure with quarterly covered in this guidance document. For aquaculture drugs, it is unlikely that the this control approach is a control intended use of the product will affect the strategy referred to in this document signifcance of the hazard. If the hazard is the result of aquaculture, do you have a relationship with the grower that enables Example: you to visit the farm before receipt of the fsh? The certifcates indicate the presence of a family of should state that all drugs were used drugs, rather than any specifc drug. Tests are not available to assay for all drugs that might be used in all aquacultured this control approach is a control species. Processors should be cautioned that tests that strategy referred to in this document have not been validated may be unreliable. This control approach is a control Example: strategy referred to in this document A primary processor of aquacultured as Control Strategy Example 3 trout that regularly purchases Records of Drug Use. If the hazard is the result of transportation of live program that covers aquaculture fsh, then you should identify the receiving step drug use. This control approach is a control strategy referred to in this document as Control Strategy Example 6 Control During Holding. Aquaculture drugs are used on food-producing fsh only if they have been: How Often Will Monitoring Be Done (Frequency)? Certifcates may be issued on a lot-by-lot (no less than annually) or continuing basis. New animal drugs for investigational Rules and regulations: new animal drugs: use. Extralabel use of approved Tolerances for residues of new animal drugs drugs in aquaculture. Time and temperature abuse occurs when a product is allowed to remain at temperatures Pathogenic bacteria growth and toxin formation favorable to pathogenic bacteria growth for as a result of time and temperature abuse of fsh suffcient time to result in unsafe levels of and fshery products can cause consumer illness. This hazard is limited to bacterial pathogens since Therefore, management of time and temperature viral pathogens (viruses) are not able to grow in of product exposure is important to producing food. The following factors should be for a description of the public health impacts of considered: these pathogens. Whether those pathogens can grow in the during processing from the air, unclean hands, food; insanitary utensils and equipment, contaminated water, or sewage and through cross-contamination. The expected initial level of the pathogenic method for control is to reduce levels through bacteria in the food. Table A-1 (Appendix 4) provides guidance They might be present only at low levels or only on some conditions that limit the growth sporadically, but even such occurrences warrant of those pathogenic bacteria that are most consideration because of the potential for growth relevant to fsh and fshery products. Table A-1 and toxin production under temperature abuse provides minimum and maximum values of conditions. This table can help are associated with specifc food sources, and it you to decide whether particular pathogenic may not be necessary to assume that they will be bacteria will grow in your food if it is time and present in other foods unless introduced from a temperature-abused. Others may grow if the natural designed sanitation programs will minimize condition of the raw fsh is changed, such as their introduction. Pathogenic bacteria growth Most pathogenic bacteria will grow well in Fish and fshery products generally provide temperature-abused cooked fsh if their growth is suffcient nutrients for pathogenic bacteria not controlled by means such as drying, salting, growth. However, chemical and physical or acidifcation, because competing bacteria are characteristics of the product and its packaging destroyed by the cooking process. Furthermore, these characteristics could restrict competing the infective dose or toxic dose is the total microorganism growth and provide conditions number of a pathogen, or the total amount of a favorable to pathogenic bacteria growth. The dose often varies considerably for a single Consider: pathogen based on the health of the consumer. The moisture available to support pathogenic and the virulence (infective capacity) of the bacteria growth in the product. In other words, product temperatures should be maintained Consider the above described factors to identify below the minimum growth temperature for the the pathogen(s) that presents the greatest pathogen or should not be allowed to exceed challenge with respect to managing time and that temperature for longer than the lag growth temperature exposure in your product. Table A-2 (Appendix 4) can environment before proceeding to rapid growth) then be used to establish safe exposure times of the pathogenic bacteria at the exposure for the target pathogen(s) at the temperatures at temperature. Still other pathogenic bacteria require large As an alternative, you can use predictive numbers in order to cause disease. Limited growth of these Growth rates of pathogens are highly pathogens might not compromise the safety of temperature dependent. However, time and temperature bacteria growth is relatively slow at temperatures controls must be adequate to prevent growth below 70?F (21. On the other hand, pathogenic present in a fsh or fshery product is dependent bacteria grow relatively fast at temperatures on factors such as the quality of the harvest above 70?F (21. Product temperatures should water, how the raw material was handled be maintained below the minimum growth before it was delivered to your plant, and the temperature for the pathogen or should not be effectiveness of your sanitation control program. Product strategy because these pathogens should be surface temperature or ambient temperature controlled by a time and temperature strategy generally should be monitored when the ambient that does not permit their growth to pass the temperature. Similarly, when selecting a bacteria after the pasteurization process product for temperature measurement, consider (covered in Chapter 18); the location of the product selected in relation to . Controlling the source of molluscan shellfsh the environment and select the likely worse case and the time from exposure to air. For example, a product in the center of harvest or receding tide) to refrigeration to a pile of products will take longer to cool than a control pathogens from the harvest area product at the surface. Managing the amount of time that food is determining whether pathogenic bacteria growth exposed to temperatures that are favorable and toxin formation as a result of time and for pathogen growth and toxin production temperature abuse is a signifcant hazard at a (covered generally in this chapter; for processing step: Clostridium botulinum (C. Is it reasonably likely that unsafe levels of batter mixes, in Chapter 15); pathogenic bacteria will be introduced at this.

At artificial insemination centres kerafill keratin treatment cheap 2.5 ml xalatan with mastercard, the artificial vagina can be flushed out after the semen has been collected symptoms 5dpiui order generic xalatan on line. This method can treatment 3rd metatarsal stress fracture discount xalatan 2.5 ml mastercard, of course medicine to stop diarrhea xalatan 2.5ml amex, only be used if the bulls are in the early 4 medications walgreens purchase xalatan 2.5ml amex, late or latent stages of infection medicine x ed xalatan 2.5 ml sale. In the case of abortion, there is little or no virus present in the tissues of the aborted fetus. To attempt virus isolation in this instance, a cotyledon, together with a portion of attached placenta, should be collected and dispatched under cool conditions to a diagnostic laboratory. Immediate cooling and proper shipment, together with a serum sample, are desirable (6). Otherwise, it is advisable to examine a number of animals from different age groups before making a diagnosis. Infected animals are then frequently detected where the only typical sign of illness is a high body temperature. Such animals usually shed large amounts of virus, whereas animals with secondary infections excrete only small amounts of virus. Animals with latent infections often shed infectious virus as the result of stress, usually without exhibiting any typical clinical signs of infection. Serological tests Where the disease is endemic, the investigation of new outbreaks should include the detection of a rise in specific antibodies in cattle sera or, where appropriate, in milk. For the purposes of control, surveillance, or certification for trade, a highly sensitive serological test should be used. Sampling strategies for surveillance purposes should be based on standard statistical methods. It should be noted that antibody assays used on milk samples may be less sensitive than when used for sera. For large herds, animals to be sampled should be selected from each age cohort, for example from 0-3 months, 4-6 months, 7-12 months, 13-24 months, then at yearly intervals up to 8 years of age, and finally, cattle above that age. The only difference is in the step in which the serum/virus mixture comes into contact with the cells. In the tube and plaque reduction test the mixtures are pipetted onto the monolayers and in the microtitre plates the cell suspension is added to the mixture. Serial serum dilutions are performed either in 2-fold or 4-fold dilutions, starting with undiluted serum. Two or four test tubes or microplate wells should be used per dilution; in the plaque reduction test one petri dish per dilution is sufficient. Controls should include a known seronegative and a titration of a known seropositive serum, together with a titration of the test virus to ensure that its titre is within acceptable limits (30-100 TdD50). In the microtitre plates wells are virus positive where virus-specific cytopathic effect is observed. A serum is considered positive when no evidence of virus multiplication is observed in one or more of the wells with undiluted serum portion. The handling of such samples is described in detail by the manufacturers of the kits. For this, two animals are inoculated by spraying the vaccine onto the mucous membranes of the upper respiratory and/or genital tracts and the production of virus is monitored by collecting the mucus on swabs. Three days after vaccination, the virus is passaged into two more animals, which should preferably be 6-8 months pregnant. The mucus collected on each swab is weighed and 10-fold dilutions of this material prepared. The 1 first (or 10") dilution is retained to inoculate (5 ml) each animal for the passages. The infectivity titre of the remaining dilutions is determined in suitable bovine tissue cultures. The handling of ts-mutant vaccines is the same as that described above for the live attenuated vaccines. Genetically engineered vaccines are handled in a similar manner, but they must also be shown to be genetically stable by using suitable methods, such as restriction enzyme analysis (1). For inactivated vaccines, suspensions of the suitable virus strains are inactivated by the appropriate methods. The inactivation process is controlled by inoculating bovine cell monolayer cultures. Two passages are carried out during which no evidence of virus growth should be detectable during an observation period of 7 days for each passage. LyophiUsed vaccine can be stored according to the results obtained in stabiUty tests. The monolayers may be primary or low-passage calf tissue cultures, or a continuous bovine ceU Une, placed in maintenance medium at 37?C under appropriate conditions. The time of harvesting is determined by the occurrence of an advanced characteristic cytopathic effect involving 70-100% of the cells. The cells used for vaccine production should be derived from normal, healthy tissues and should be free of bacterial, fungal, mycoplasmal and viral contamination. Virus-serum mixtures are examined for residual Uve virus by inoculating a series of ceU cultures which must be maintained and examined under a microscope for at least 10 days. The minimum infectivity titre required for the vaccine must be determined by the national authorities. The potency of inactivated vaccines should be tested in cattle and/or suitable laboratory animals. Samples taken from ampoules of each batch of vaccine must be tested for the possible presence of bacterial, mycotic and mycoplasmal contamination. Control of theilerioses in many countries is by control of their vectors, often as part of a general tick-bome disease control strategy. Tick control has become less reliable because acaricides are expensive, resistance has developed to many of them, regulations regarding cattle movement and quarantine are not strictly enforced, and management and maintenance of dips and spray races are often poor. More reliable systems are desirable and vaccination should provide for better control of theileriosis. Identification of the agent: Diagnosis of disease is based upon clinical signs, a knowledge of disease and vector distribution, and examination of Giemsastained blood and lymph node smears. Test sera are diluted with bovine lymphocyte lysate and incubated with antigen, and antibovine immunoglobulin conjugate is then added. Using the test as described, the fluorescence is specific for the etiological agent. However, because of the problems of cross-reactivity between some Theileria species, the test has limitations for large-scale surveys in areas where these species overlap. Developments in molecular biological techniques provide possibilities for new more sensitive and specific tests. Requirements for biological products: Reliable vaccines of known infectivity are a recent development. They are transmitted by ixodid ticks and have complex life cycles in both vertebrate and invertebrate hosts. The most widely used method for the control of theileriosis is chemical control of ticks with acaricides. However, tick control has become less reliable because of acaricide resistance, the high cost of acaricides, poor management of tick control, and illegal cattle movement in many countries. Vaccination using attenuated schizont-infected cell lines has been widely used for T. Parvaquone (Clexon, Wellcome) and halofuginone (Terit, Hoechst) are used to treat T. Indigenous cattle in endemic areas may experience very mild disease or subclinical infection while introduced indigenous or exotic cattle are susceptible and may die when infected. Identification of the agent the schizont is a characteristic diagnostic feature of infections with T. Diagnosis is based upon clinical signs, a knowledge of disease and vector distribution, and examination of Giemsa-stained blood and lymph node smears. The infected animal shows enlargement of the lymph nodes, fever, a gradually increasing respiratory rate, dyspnoea and/or diarrhoea. In animals that recover, occasional relapses occur and a nervous syndrome called "turning sickness" is sometimes seen. In this syndrome intravascular and extravascular aggregations of schizont-infected lymphocytes may be detected and accompanied by thrombosis and ischaemic necrosis. The smears should give between 50-80 intact cells/field when examined under x 40 oil immersion objective. This is usually achieved by spreading approximately 200 |il of the cell suspension onto a well and then immediately aspirating the excess and transferring to the next well. With this method approximately 600 good quality slides containing a total of 6,000 individual antigen spots can be obtained. The smears are air-dried, fixed in acetone for 10 minutes, individually wrapped in tissue paper and then in groups of 5 in aluminium foil, and stored in airtight, waterproof plastic containers at either -20?C or -70?C. The viability of the cells is determined by eosin or trypan blue exclusion (should be greater than 90%). The cells are resuspended in cold saline, in 10 times less than the original volume. To this volume, two volumes of a cold fixative solution containing 80% acetone and 0. Experimental infections are induced by infecting cattle subcutaneously with sporozoites using ticks infected with either T. The dried spots are fixed in methanol and stained with Giemsa stain and the concentration of erythrocytes examined using a light microscope. The dilution which gives a single layer of erythrocytes spread uniformly on the spot is then selected, for large scale preparation of piroplasm antigen sudes. Approximately 10,000 antigen slides (100,000 antigen spots) can be prepared from 100 ml of infected blood. The antigen smears are allowed to dry at room temperature before fixing in acetone for 10 minutes. The fixed smears can be stored as for the schizont antigen slides, and keep for similar periods. The fixed cells are then washed three times with saline and centrifuged at 1,000 g for 30 minutes. Using this dilution, test antigen smears are prepared on slides and these antigen smears plus the antigen slides previously frozen are thawed and tested against a panel of known strong, intermediate and weak positive and negative control sera. In laboratories where adequate low temperature storage faculties with a reliable supply of electricity are available the acetone-fixed slides can be used. Antigens fixed in suspension have an advantage over the acetone-fixed smears because the initial method of preparation is simpler and quicker. The antigens fixed in suspension can also be stored at 4?C and can be safely transported at room temperature without loss of antigenicity. Briefly, a 3-month old calf is splenectomised and maintained under tickand tsetse fly-free conditions. To exclude the possibility of latent infection, blood smears from the animal are taken daily for a period of 4 weeks, stained with Giemsa stain and examined for parasites. The animal is euthanised and the thymus and all the accessible lymph nodes are removed. The cells are disrupted by sonication in 100 ml aliquots on ice for 5 minutes using the 3/8 probe. The sonicated material is centrifuged at 1,000 g for 30 minutes at 4?C and the supernatant, adjusted to 10 mg protein/ml, stored at -20?C in 4 ml aliquots. The frozen schizont antigen fixed in suspension and stored at -20?C is thawed at room temperature while the piroplasm antigen kept at 4?C is resuspended by agitation, passed through a 25 gauge needle to break the clumps (not nccsssary for schizont antigen) and diluted to previously standardised dilutions. For initial screening 1:40 dilutions of test and control sera are made in lymphocyte lysate (195 |xl lymphocyte lysate + 5 (xl serum) and incubated for 30 minutes at room temperature. For each slide, the positive and negative control sera, diluted 1:40, are included. Ten pi of antibovine immunoglobulin fluorescein isothiocyanate conjugate at recommended optimal dilution is applied to each well. Evans blue is incorporated in the conjugate at final dilution of 1:10,000 as a counterstain. Slides once prepared are stable and can be read up to 72 h after preparation when kept at 4?C. Following recovery, antibodies may last for a variable period of time depending on several factors such as the establishment of a carrier state, chemotherapeutic intervention, and presence or absence of rechallenge. In recovered animals low titres of antibody are most often detectable for at least 12-24 months. However, if the test is used to detect antibodies against different species of Theileria, specificity of the test needs to be carefully evaluated. However, because of the problems of cross-reactivity between some Theileria species, the test has limitations for large-scale serological surveys in areas where these species overlap. There is a need for tests which are more specific, easy to interpret and robust enough to be used in field conditions. Eventually, the aim would be to develop these technologies for the diagnosis of all the vector-borne diseases. However, reliable vaccines of known infectivity are a much more recent development. The procedures for production and safety testing have been described (6, 8, 11, 12) and the vaccine is used widely in Israel, Iran, Turkey, India, Southern Russia and China. Theileriosis (B20) 337 Seed cultures are prepared from cryopreserved infected cell lines which have been isolated from cattle and attenuated as described below. In mass cultivation for vaccine production, cultivation is recommended from the seed culture following 20-30 passages because there is some uncertainty about the immunogenic stability of these cultures in long term passage. The presence of bright refractale cells free in the medium (on examination using a phase contrast or inverted microscope) is indicative of cell growth.

Syndromes
- Anemia of chronic disease
- Losing weight without trying
- Relative contraindication means that caution should be used when two drugs or procedures are used together. (It is acceptable to do so if the benefits outweigh the risk.)
- Groove behind the head of the penis
- Difficulties with vision and eye movement
- Mental changes
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The same year, alQaeda associate Ahmad Rassam testified that bin Laden was interested in acquiring 27 aircraft to disseminate biological agents at low altitude. Also in 2001, interrogations of two captured militants in Malaysia led to allegations that al-Qaeda affiliate group Jemaah 28 Islamiyah was attempting to procure and weaponize biological agents. The network would need significant technical assistance to weaponize biological agents for use in a terrorist attack. Anthrax bacteria can be harmful if dispersed in aerosol form, or by personal contact. While anthrax bacteria in aerosol form is lethal, it is extremely difficult to weaponize Bacillus anthracis spores so they maintain virulence and are easily dispersed. The biological toxin ricin can be extracted from castor beans, and while deadly, it is only suitable for targeted poisonings as it is not contagious. Radiological Materials Although there is strong evidence to suggest that al-Qaeda has attempted to procure radiological material, there is no indication that the network has been successful in this endeavor. British authorities claimed to have discovered documents suggesting that the network had constructed a radiological dispersion device, or dirty bomb, at an 31 unspecified location in Afghanistan. In April 2001, Bulgarian businessman Ivan Ivanov reportedly told authorities that he had met bin Laden in China, near the Pakistan border, to discuss business plans for an 32 environmental company to purchase nuclear waste. In April 2002, another al-Qaeda member, Abu Zubayda, claimed that the network had the knowledge to construct a dirty 33 bomb and hinted that there may be such a device hidden in the United States. A more well-publicized case occurred in May 2002 with the arrest of al-Qaeda affiliate Abdullah alMuhajir (Jose? Padilla claimed that he was part of an al-Qaeda plot to detonate a radiological dispersal device in the United States. Reports in early 2004 indicate that al-Qaeda affiliate Midhat Mursi (Abu Khabab) may have constructed a radiological dispersal device. British officials arrested eight men in June 2004 after the discovery of information on explosives, chemicals, and radiological materials and building plans of the New York Stock Exchange, the International Monetary Fund in Washington, D. Reports in late 2004 suggest that an al-Qaeda affiliate by the name of Walid al-Misri told investigators that bin Laden may have purchased radiological material 37 from contacts in Chechnya. Nuclear Materials There are many exaggerated accounts of al-Qaeda procuring both radiological and nuclear 38 material in the form of an off-the-shelf explosive device. Reports in 1998 indicated that bin Laden had plans to acquire nuclear material from Chechen contacts as well as contacts 39 in Kazakhstan. Reports in 2000 allege that bin Laden sent associates to acquire enriched 40 uranium from unspecified Eastern European countries. There were also accounts in 2001 and 2002 that bin Laden had obtained enriched uranium rods and/or a suitcase nuclear weapon from the Russian mafia as well as a Russian-made suitcase nuke from Central 41 Asian sources. Also in 2001, reports surfaced that Pakistani scientists had shared nuclear 42 information with bin Laden. Although Paracha later denied the allegations, he admitted to meeting bin 43 Laden in 1999 to consider a potential business deal. Pakistani journalist Hamid Mir reported in 2004 that al-Zawahiri had claimed in an interview that the al-Qaeda network had acquired nuclear weapons from Central Asia. The al-Qaeda deputy leader allegedly told Mir that affiliates had traveled to Moscow, Tashkent, [and] countries in Central Asia 44 with the intent to purchase portable nuclear material. In 2001, Jamal al-Fadl claimed that he was responsible for investigating the purchase of uranium to be used in 45 the construction of a nuclear device in the early 1990s. Reports surfaced in 2004 that alQaeda had purchased nuclear devices from the Ukraine in 1998. In January 2005, German authorities arrested suspected alQaeda member Ibrahim Muhammad K. Muhammad had allegedly approached an unspecified source 49 in Luxembourg to facilitate the transaction. Moroccan investigators reportedly uncovered a plot by al-Qaeda affiliate group Salafia Jihadia to attack a French nuclear power plant at Cap de la Hague, Normandy. One major obstacle to the acquisition of a ready-made device is political will; it is highly doubtful that any regime would transfer such a device to this terrorist network for fear of discovery and subsequent armed retribution by the United States. Reports regarding nuclear weapons development are mostly speculative and highly sensational, although there have been numerous reports of attempts to acquire uranium on multiple 51 occasions. All available reports suggest that al-Qaeda has yet to acquire the requisite amount of fissile material to construct a nuclear device. Equally important, it appears that the network lacks the technical capability to assemble a nuclear device*even if it were to obtain many of the needed materials. The group would need significant technical assistance from nuclear scientists in order to manufacture a nuclear weapon. Of particular concern is the allegation that a small number of Pakistani nuclear scientists have had contact with al-Qaeda over the past decade. Specific reports allege that two Pakistani scientists transferred nuclear weapon 52 information to Osama bin Laden in the mid-to late 1990s. Three days after the arrests, a seventh man was detained in connection with the case. British authorities reported that at least one of the suspects had trained in an al-Qaeda camp in Afghanistan, while the others may have participated in terrorist training exercises in Chechnya and the 54 Pankisi Gorge area of Georgia. The case quickly became world news after British authorities reported the discovery of castor beans, equipment to process the beans, and 55 traces of ricin in the apartment shared by the original six suspects. Subsequent reports indicated that the men implicated in the ricin plot did indeed maintain connections to the al-Qaeda network and that Osama bin Laden had been directing a number of terrorist cells throughout Europe that were intent on producing poison to be used in terrorist attacks. Despite these numerous allegations, the nature of the London ricin plot remained in question. On April 13, 2005, a London jury acquitted four of the suspects in the ricin case. Information presented in the trial led to the conclusion that there had been no traces of ricin discovered in the London apartment. While field equipment used by chemical experts did test positive for ricin, subsequent laboratory tests revealed that the reading had been a 56 false positive. Furthermore, it appeared that the five-page document of crude instructions on how to produce ricin, cyanide, and botulinum toxin had been copied from the Internet, as opposed to having been taken from a terrorist training camp in Afghanistan, as previously suspected. Subsequent investigations revealed that the lists of chemical instructions discovered in the London apartment were direct translations from an 57 Internet site maintained in Palo Alto, California. The only suspect convicted in the trial was Kamel Bourgess, an Algerian who was already serving time in prison for the murder of a British constable in connection with the 58 case. Reports indicate that Bourgess had planned to smear a ricin mixture on door 59 handles in order to cause casualties in North London. However, it appeared that Bourgess was far from being able to carry out the attack, given the crude attempts to produce the poison. Even if he had successfully produced ricin, the substance would not be an appropriate agent to cause mass casualties. Since ricin is a biological toxin as opposed to a bacteria or virus, it is not contagious and cannot spread rapidly between individuals. The surest way to induce fatalities is to encourage inhalation or ingestion of the substance in a powder form or after it is dissolved in a liquid. Ansar al-Islam in Northern Iraq Ansar al-Islam originated in Kurdish northern Iraq and is one of the most active Islamist groups operating in Iraq since well before the 2003 coalition invasion. The group is significant in that it is an al-Qaeda affiliate that has engaged in the production of both biological and chemical agents, purportedly for use as terrorist weapons. Most reports indicate that Ansar has worked with both cyanide and ricin; however, there is no evidence to indicate that the group ever reached a stage of weaponization. Still other reports claim that Ansar had produced or acquired ricin and had 62 conducted biological warfare experiments. Investigations of the laboratory discovered in northern Iraq revealed that it was rudimentary and that the group was far 64 from achieving a real weapons capability. Ansar members claimed to have produced ricin, cyanide-based toxics, and aflatoxin 65 prior to the U. After the invasion, coalition forces also reportedly uncovered a three-volume manual that outlined steps for conducting chemical and biological experiments. The group had allegedly tested both substances in 67 preparation for future use, including experiments on live animals. Both ricin and cyanide are reasonable choices for a group that is planning to conduct a targeted attack because they are easier substances to manipulate than some of their more virulent or unstable counterparts. In addition, since very little would be needed for a limited attack, it makes sense to choose agents that are easy to acquire and/or produce. Ricin is one of the easier biological toxins to produce, while cyanide is a chemical that can be acquired from an industrial complex. However, despite the deadly nature of these substances, neither can be appropriately labeled as a weapon of mass destruction. Difficulties in weaponization mean that such substances are suitable only for targeted assassinations, as opposed to mass casualty attacks. In early 2002, American troops near Kandahar reported the discovery of an abandoned facility that 70 appeared to have been built to research/weaponize biological agents. Traces of ricin and 71 production instructions were also reportedly discovered in an al-Qaeda safe house. Reports from the late 1990s indicate that the network attempted to create a pesticide/nerve agent with 75 a very high absorption rate and that the substance was tested on dogs and rabbits. Indeed, there is evidence to suggest that al-Qaeda has conducted experiments using crude chemical agents, some of which included the use of cyanide. One of the most telling pieces of evidence is a training video uncovered by investigators in which a dog is enclosed in a box and killed with a chemical substance believed to include cyanide. For one, investigators have not reported the discovery of any kind of dispersal device, a main requirement for the use of a chemical or biological agent for weapons purposes. It would be a sin for Muslims not to try and possess weapons that would prevent the infidels from 78 inflicting harm on Muslims. Furthermore, it was reported that bin Laden hired an Egyptian nuclear scientist and was able to purchase one kilogram of uranium from 80 South Africa. Subsequently, an American official reported, Osama [was] directly involving himself with the Sudanese government, trying to get it to test poisonous gases 81 in case they could be tried against U. In February 1994, the Saudi Arabian government revoked his Saudi citizenship and froze his financial assets as a reaction to his aggressive and overt criticism of the monarchy. Later that year, the Saudis also induced his older brother, Bakr, to denounce and condemn Osama on behalf of the bin Laden family. More significantly, it is believed that in February 1994, Osama was the target of two failed assassination attempts. The first failed attempt was carried out by the Saudi intelligence services, while the second was conducted by al-Khulayfi, an angry member of the Egyptian Islamist group al-Takfir Wal Hijra. Who is going to protect the people, the states, the wealth and the Islam of Central Asia, who have scarcely escaped the assault of the Red 84 Satan, only to face a more sinister attack from Washington and Tel Aviv? What if Israel decided to use atomic bombs, chemical or biological weapons against an Arab or Muslim capital? And what would be the Islamic reaction if Afghani cities were targeted from America or Israel with Atomic bombs? Its ultimate goal was to obtain atomic weapons and store them on American soil to retaliate immediately for prospective U. A third faction argued that weapons of mass destruction would considerably enhance the fighting capability and moral influence of the Mujahideen and the fighters of al-Qaeda. They are in dire need of such weapons to compensate for the vulnerability of their military ordnance, the insufficiency of their numbers and their 87 growing isolation from their peoples. It would not hesitate to annihilate a weaker opponent but would retreat in disarray if faced with a stronger enemy. In 2001, following the 9/11 attacks that killed roughly 3,000 American and other citizens, the United States and its allies invaded Afghanistan and denied al-Qaeda its last abode on the face of the earth. At this point, al-Qaeda is in the midst of a conflict, which it aims to expand and intensify by inducing the United States to act more aggressively in the region in the hopes of escalating Muslim antagonism toward the West and increasing the appeal*and membership*of global jihadi organizations. The al-Qaeda leadership anticipates that new recruits will swell the ranks of these jihadi affiliates and undermine the security and rule of secular or moderate Muslim regimes. The ultimate goal, as has been the case since the conception of al-Qaeda, is the overthrow of these regimes. Moreover, attacking American and other Western targets is seen by al-Qaeda as the most effective strategy to drive a wedge between the United States and its Arab and 89 Muslim allies. Bin Laden made this sentiment clear in November 2002 when he stated: This is an unfair division. The hope is that this first-strike capability would also bring about a severe American reprisal that would only serve to garner more support for Islamists in the Muslim world. In May 2003, bin Laden likely prompted the respected and well-known young Saudi Islamic scholar Shaykh Nasir bin Hamid al-Fahd to issue a fatwa (religious decree) in support of such actions. In his 25-page document, A Treatise on the Legal Status of Using Weapons of Mass Destruction Against Infidels, Shaykh al-Fahd empowered al-Qaeda with a fatwa and provided the religious justification needed to carry out such an attack. In his document Shaykh al-Fahd argued, This matter is so obvious to Muslims that it needs no demonstration.
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