Which of the following statements is wrong about HAV virus? ()
A. +ssRNA virus
B. Can be cultivated in cell
C. Bing spread by the fecal-oral route
D. Never lead to chronic disease
E. anti-HAV IgG is the earliest diagnositic evidence
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The main hiding site of HSV-1 is ()
A. labial skin
B. pharyngeal lymph node
C. spinal neural ganglia
D. trigeminal ganglion
E. none of above
Gp120 of HIV is encoded by which gene of blowing ()
A. env
B. pol
C. gag
D. tat
E. rev
Which animal species is not a reservoir of rabies? ()
A. Field mice
B. Skunk
C. Vampire bat
D. chick
E. Fox
Mad Cow Disease has been highly publicized in Great Britain.This disease, which is similar to scrapie, is caused by ()
A. Prions
B. Viruses
C. Rickettsiae
D. An autoimmune reaction
E. A bacterium with a defective cell wall
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