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