Zoonotic3- Influenza

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  1. Influenza A viruses infect __(2)__; they are a source of __________ and all ___________.
    birds and humans (and other species); seasonal influenza; pandemics
  2. Influenza B viruses infect _________.
    humans only
  3. Influenza C viruses infect __(2)__ and do not cause _________.
    humans and pigs; pandemics (usually mild disease)
  4. Influenza A is a ________ virus that is _________.
    -ssRNS; enveloped
  5. Minor antigenic changes over time due to point mutations.
    antigenic drift
  6. Major antigenic changes due to genomic reassortment.
    antigenic shift
  7. Pandemic influenza occurs when a new strain of influenza emerges where: (2)
    there is little or no immunity in the human pop, the virus is able to spread efficiently from person-to-person
  8. What is the primary reservoir for influenza A virus?
    wild birds
  9. What are the 2 recognized forms of influenza A viruses that infect domestic birds?
    high-pathogenicity avian influenza, low-path avian influenza
  10. Contrast high-path and low-path avian influenza.
    high-path causes severe disease and nearly 100% mortality, low-path causes decreased egg production or mild upper respiratory disease without death
  11. Influenza A viruses cause outbreaks of _________ in swine herds with ________ mortality.
    respiratory disease; low
  12. Influenza A virus causes _________ disease in equines with _______ mortality.
    respiratory; low
  13. Symptoms of influenza virus in humans. (8)
    fever, cough, sore throat, stuffy nose, body aches, irritated eyes, headaches, fatigue
  14. Modes of transmission of influenza virus.
    droplets** from coughs and sneezes (large droplets that don't suspend in air or travel very far), direct/indirect contact with infected fluids/contaminated surfaces, airborne (small droplets that suspend in air)
  15. How is influenza transmitted b/w birds and humans?
    direct handling of an infected bird, slaughtering, de-feathering, butchering, or preparing diseased birds, +/- ingesting undercooked meat
  16. How do you prevent influenza infection? (3)
    hand washing, don't eat/smoke/touch face in animal areas, shower/change clothes before leaving animal areas
  17. Why does swine-to-human transmission sometimes go unrecognoized?
    signs and symptoms of closely resemble those of human seasonal influenza
Card Set:
Zoonotic3- Influenza
2015-11-12 18:37:47
vetmed zoonotic3

vetmed zoonotic3
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