Virulence factors of Vibrio cholera exclude ()
A. flagella
B. pili
C. exotoxin
D. endotoxin
E. none of the above
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The important condition of C.tetani infection is ()
A. no immunity
B. vegetatives of
C. tetani contaminate wound
D. anaerobic microenvironment
E. dysbacteriosis
F. none of the above
What is the pathogenesis of tetanospasmin? ()
A. blocking the release of inhibitory interneurons
B. enhance the release of inhibitory neurons
C. injure ganglion of spinal cord
D. injure motor neuron of spinal cord
E. none of the above
BCG vaccine is the variation strain of M.bovis. What is the variation?()
A. colony variation
B. appearance variation
C. structure variation
D. virulence variation
E. none of the above
Tuberculin test is ()
A. type Ⅰ hypersensitivity
B. type Ⅱ hypersensitivity
C. type Ⅲ hypersensitivity
D. type Ⅳ hypersensitivity
E. none of the above
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