超星 - Quiz of streptococcus

单选题

Which species of streptococcus has higher virulence?

A. Streptococcus pyogenes,
B. Streptococcus varidans,
C. Streptococcus nonhemolyticus
D. All have

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单选题

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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单选题

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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单选题

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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单选题

Which is not the virulent structure molecule of streptococcus?

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

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单选题

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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单选题

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,

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单选题

Which virulent molecule is associated with the infection of temperate phage in streptococcus?

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

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单选题

Your patient has subacute bacterial endocarditis caused by a member of the viridans group of streptococci.Which one of the following sites is MOST likely to be the source of the organism？

A. Colon
B. Skin
C. Oropharynx
D. Urethra

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单选题

ASO test is applied to make a diagnosis for infection of -----?

A. Streptococcus pneumonia,
B. streptococcus pyogenes
C. Staphylococcus aureus
D. streptococcus viridans.

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