题目内容

20 groups of streptococcus are classified based on ____ antigen in Lancefield classification system.

A. Capsule antigen;
B. M protein
Cell wall
D. R

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Each statement is right about group A streptococcus EXCEPT___?

A. 90% pathogenic streptococcus is in Group A.
B. Most streptococci containing the group A antigen are S pyogenes.
C. Most streptococcus in Group A cause α- hemolysis.
D. Group A Streptococcus, which is synonymously known as S.pyogenes

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Which following one of the streptococcal toxic molecules is not involved in dissemination of Streptococcus?

A. pyrogenic exotoxins ,
B. hyaluronidase,
C. Streptokinase,
D. streptodornase,

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Which is not the virulent structure molecule of streptococcus?

A. LTA,
B. M protein,
C. capsule
D. LPS

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Which molecule can degrade DNA released from dead cells in abscesses, facilitating bacterial spread during streptococcal infection?

A. streptokinase,
B. streptodornase
C. hyaluronidase
D. Coagulase;

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20 groups of streptococcus are classified based on ____ antigen in Lancefield classification system.

A. Capsule antigen; B. M protein Cell wall D. R

Each statement is right about group A streptococcus EXCEPT___?

Which following one of the streptococcal toxic molecules is not involved in dissemination of Streptococcus?

Which is not the virulent structure molecule of streptococcus?

Which molecule can degrade DNA released from dead cells in abscesses, facilitating bacterial spread during streptococcal infection?

A. Capsule antigen;
B. M protein
Cell wall
D. R