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Avian Influenza
Orthomyxoviridae
Question | Answer |
---|---|
Synonym: | Fowl Plague |
There are 3 places where lesions are found characteristically: | Respiratory, Enteric, and/or Nervous System |
Zoonosis: | Yes, some strains are! |
More virulent for chickens than turkeys: | A/chicken/Scotland/59 |
More virulent for turkeys than chickens: | A/turkey/Ontario/7732/66 |
Hosts: | many avian species and TURKEYS more often than chickens |
Reservoir hosts: | Migratory water fowl, especially DUCKS |
Transmission: | Aerosolization. Ingestion of contaminated water or feed with feces |
Sites of replication: | Respiratory and intestinal tracts |
Highly virulent strain (Highly Pathogenic Avian Influenza A virus [HPAI])causes: | Viremia. Myocarditis, Encephalitis, and Myositis caused by multifocal lymphoid and visceral necrosis |
Neutralizing antibodies are detectable how soon? What is another name for them? | Withing a couple days after the onset of the disease and can last for 18 months. Hemagglutination Inhibition Abs |
Clinical signs: | Blood-stained oral and nasal discharges. Combs and wattles are cyanotic. Airsacculitis. Drop in egg production and quality of the egg. Morbidity and Mortality rates vary depending on the virulence of the strain |
2 Methods for control of the virus: | Quarantine & Eradication. |
What are sentinel birds used for? | How long to wait between slaughter and repopulation when eradicating the virus |
Vaccines? | NONE |