Zoonotic- Ticks

  1. Hard ticks.
  2. Soft ticks.
  3. Describe the tick life cycle.
    egg--> six-legged larva (blood meal then molt)--> eight-legged nymph (blood meal then molt)--> adult
  4. Generally, _______ is required for transmission of an infectious agent from a tick.
  5. Etiologic agent of RMSF.
    Rickettsia rickettsii
  6. Rickettsia risckettsii infects __________, causing _________ damage and ___________.
    endothelial cells; vascular; multi-system organ failure
  7. Ticks are __________ for RMSF.
    reservoirs AND vectors
  8. 2 most important vectors for RMSF.
    Dermacentor variabillis and andersoni
  9. Transmission of RMSF b/w ticks is... (2)
    transovarial or transtadial
  10. Clinical signs of RMSF in humans. (5)
    fever, headache, abdominal pain, nausea/vomiting, rash
  11. Can humans get RMSF from their dogs?
    no, but subclinical infected dogs are a sentinel for human disease
  12. For RMSF, transmission from a tick is unlikely if attachment is less than ______.
  13. Etiologic agent of lyme disease.
    Borrelia burgdorferi
  14. What is the vector for lyme disease?
    Ixodes ticks
  15. What is the most important reservoir of lyme disease in the eastern US?
    white-footed mouse (Peromyscus lecopus)
  16. What is a dead end host of lyme disease?
    white tailed deer
  17. What are clinical signs of lyme disease in humans?(2)
    bullseye rash (erythrema migrans), chronic symptoms
Card Set
Zoonotic- Ticks
vetmed tick-borne zoonotic diseases