Epi Final, IV

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HLW
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136150
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Epi Final, IV
Updated:
2012-02-18 13:31:02
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Epi Final IV
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Epi Final, IV
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  1. What is one of the most important host factor that will cause host to be more susceptible to disease?
    stress
  2. What is the resistance of the group and is based on collective immunity of the group?
    herd immunity
  3. Does resistance to an agent require that the entire group be immune?
    no, just a substantial proportion of the group
  4. What is the balance between the number of immune animals in herd and rate of addition of susceptible animals?
    endemicity
  5. What are some determining factors for duration of immunity of herd?
    • intro of susceptible animals to herd and stress factors
    • immune animals leave heard
    • infectivity of agent (mutation, shedding, transmission)
    • density/movement and travel
  6. What are some dangers of mass vaccination?
    • vx can be source of other agents with serious effects
    • used w/o full understanding of epidemiology
    • attenuated can revert to virulence
  7. What is term for what happens to animals as they move through production cycle, including management practices?
    herd history
  8. What are 3 components that classify/define a case?
    • clinical signs
    • immunological response
    • detection of agent/analytical phase
  9. What are components of descriptive part of epidemiological work up?
    • describe disease parameters
    • herd history
    • case definition
    • generate epidemic curve
  10. What is part of analytical phase? What comes after this phase?
    • generate hypothesis (calculate attack rates)
    • after analytical is intervention/control
  11. What are possible disadvantages of FMD vaccination program?
    • create carrier state where Ab cannot be distinguished from natural infection
    • vx doesn't cover all serotypes
  12. Is how we prepare to respond to bio disasters the same regardless of cause (accidental, natural, etc.)?
    yes
  13. what are 3 major disaster types of biological origin?
    • naturally occurring diseases
    • accidental disaster
    • intentional attacks (bio-/agro-terrorism)
  14. what are some consequences of accidental and/or bioterrorism disasters?
    • economic devastation
    • physiological impact
    • improved preparedness
  15. What qualifies agents as highest priority (category A) according to CDC? (ex. Ebola)
    • easily disseminated or transmitted
    • high mortality rates/ major public health impact
    • cause public panic
    • require special action for public health preparedness
  16. What qualifies an agent as third highest priority (cat. B) according to CDC? (ex. Nipah/Hanta virus)
    • emerging pathogens that could be engineered for mass dissemination in future bc available
    • ease of production and dissemination
    • potential for high morbidity/mortality w/major impact
  17. What is veterinarian's role in natural/intentional disasters?
    • quick diagnosis and depopulation of affected animals
    • ongoing surveillance
    • encourage biosecurity and report to authorities as needed
  18. Which 2 agencies have charge of "protecting american agriculture"?
    • US dept of agriculture (USDA)
    • Animal and plant health inspection service (APHIS)

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