题目内容

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,

Which is not the virulent structure molecule of streptococcus?

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

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;

Which enzyme released by streptococcus can make a gap between the cells in the matrix, facilitating bacterial spread?

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