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IP6 Virology E2 FAD
Foreign Animal Dz and IMP Reportable DZ
Question | Answer |
---|---|
a transmissible livestock,poultry or equne dz that is usually absent from the USA & has potential for sig impact on animal health | Foreign animal disease (FAD) |
what organization identifies agents that are considered to be most important animal pathogens globably (most of which are viruses)? | Office International des Epizooties (OIE), the animal world heath organization |
______ maintains a list of High Consequence Livestock Pathogens which are reportable and considred to be high economic concern (most are viruses) | USDA |
What are 4 Ways the US agriculture is vulnerable to FAD? | 1.Extensive movements of animals 2. Animals raised in very large groups 3. High number of animals can predispoze to dz 4. Products intermingle at many levels (farm->fork) 5. Difficulty with security on farms and stores |
What are 4 Potential routes of FAD introduction? | 1. Agroterrorism 2. Accidental (tourism and imported animals) 3. Migration of wildlife 4. Natural occurrence of dz |
Who should you contact if you suspect/diagnose an FAD? | 1. Office of the State Veterinarian (can quarantine animals) 2. Foreign Animal Dz Diagnostician (FADD)-they collect the samples and make diagnosis |
What type of virus causes FMD? | Picornavirus (7 serotypes) |
What are the maintenance hosts of FMD? | sheep-they show few clinical signs but can spread virus to other animals |
What are the amplifiers of FMD | Pigs-they become ill and shed tons of virus in their respiratory secretions; contaminate the environment |
What are the indicator spp of FMD? | Cattle, lesions develop early and symptoms are severe |
How is the FMDV transmitted? | saliva, feces, urine, milk and respiratory aerosols; vesicles also have high titers (inhalation, ingetion, direct contact, fomites and airborne are all methods of transmission) |
How long can the FMDV survive in feces, hay, bran and snow covered soil | more than 100 days! |
T/F recovered or vaccinated animals can become carriers with FMDV remaining in pharyngeal areas? | True! |
which spp can become carriers of FMD | Cattle-for 2 years, Sheep for 9mo, Pigs do not become carriers |
T/F FMD can survive pasteurization temperatures and be transmitted in milk and also survives indefinitly in refrigerated meat byproducts | True |
T/F FMD can survive in frozen BM or LN | True |
Pathogenesis of FMD: | inhale/ingest virus->replication in pharyngeal epi->spread to LN->replication and dissemination to epithelial sites->vesicle formation on mouth, snout, feet and teets |
Virus can be excreted for ___ hours prior to development of clinical symptoms | 24 hours (can spread before the dz is recognized) |