380 unit 6

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380 unit 6
2010-11-14 16:06:33
Infectious disease

infectious disease
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  1. sub-acute disease
  2. chronic
    • longer incubation
    • disease present longer healing
  3. acute
    • short incubation:(time of exposure to the onset of 1st symptoms
    • disease last short
    • either recover fast or die
  4. infection
    may be subclinical
  5. colonization
    normal biota (bacterial usually found in all humans)
  6. primary disease infection
    occurs in healthy individual
  7. secondary infection
    • infection is follow by some other infection
    • ex: Haemophilus influenzae - secondary to influenza
  8. latent infection
    • persistence of viral genome w/o viral replication
    • asymptomatic
  9. pathogenesis
    • manner in which the disease develops
    • (source, transmission, penetrate, and what does it do the host)
  10. virulence
    • degree of pathogenicity
    • virulence factors: capsules, toxins, pill
  11. carriers
    • having an infectious agent and not showing obvious symptoms (dangerous)
    • early stage - incubation
    • recovery stage - bacteria & virus can still be contagious
    • chronic carriers - ex:Staphylococcus aureus, HBV, HCV
  12. reservoirs
    • location where virus can replicate
    • ex: - humans
    • -animals (zoonoses)
    • - nonliving (food borne outbreak)
  13. vectors
    • living organisms that infect and carry diseases
    • -mechanical: house flies, cockroaches (carrying on body surfaces)
    • -biological : mosquitos, ticks (internally blood meal)
  14. overt pathogen
    open and observable pathogen
  15. opportunistic pathogen
    given the right opportunity disease can affect humans
  16. nonpathogens
    • not associated with infectious diesease
    • by any bacterium can cause disease in individual
  17. outbreak
    result from the introduction of a new virus into an area and are usually confined to a small common population (hepatitis A)
  18. epidemic
    outbreaks that occur over a large population and geographic area
  19. pandemic
    • worldwide epidemic
    • eg influenza, HIV
  20. arbovirus
    group of viruses transmitted by arthropod vectors
  21. viremia
    where virus enters the body and has full asses to the rest of they body
  22. permissive tropism
    permissiveness of cells for virus replication