Which one does not belong to the group of spiral bacterium?
A. Vibrio cholera;
B. Helicobacter pylori
C. Psuedomonads ;
D. Treponema palidum;
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Each statement is right about T. pallidum EXCEPT ___.
A. It is visualized by silver stain method.
B. It can grow into colony in bloody agar plate.
C. It is thin, tightly coiled, helically shaped.
D. It is Gram-negative bacteria.
The disease caused by T. pallidum is _____.
A. enteritis;
B. syphilis;
C. urethritis;
D. gonorrhea
Which is not the virulent factors of T.pallidum ?
A. flagellum;
B. Adhesins;
C. Hyaluronidase;
D. endotoxin;
Which phases of syphilis are highly infectious ?
A. Phase I and Phase III
B. Phase I and Phase II
C. Phase II and phase III
D. All three phases
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