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
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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
Tuberculosis is acquired via the ()
A. Skin
B. Gastrointestinal tract
C. Respiratory tract
D. Genital tract
E. none of the above
Malta fever of brucellosis is because of ()
A. endotoxin release
B. bacteria invade into bloodstream
C. repeatedly bacteremia
D. the result of delayed type hypersensitivity
E. none of the above
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