超星 - Quiz of streptococcus

单选题

Which state is not right about rheumatic heart disease caused by Streptococcus?

A. It is an autoimmune response which leads to damage of heart valves
B. Streptococcus pyogenes release exotoxin cause damage to heart valves
C. Anti-O test can facilitate the diagnosis of rheumatic heart disease
D. Treatment of strptococcal infection with antibiotics reduced the morbidity of rheumatic heart disease

查看答案

单选题

Which disease is not caused by Streptococcus?

A. scarlet fever,
B. glomerulonephritis,
C. rheumatic heart disease,
D. enteritis,

查看答案

单选题

Which statement is right about Streptococcus?

Arranged in Y letter;
B. Arranged in chain,
C. arranged in a cluster of grapes;
D. It has O-antigen,

查看答案

单选题

Which statement is not right about streptococcus?

A. Gram positve; 
B. obligate anaerobe, 
C. It has no spore; 
D. It has no flagellum

查看答案

单选题

Which bacteria can not cause hemolysis on bloody agar plate?

A. Streptococcus varidans,
B. Streptococcus pyogenes,
C. Streptococcus nonhemolyticus
D. Staphylococcus aureus.

查看答案

单选题

Which one is the property of the hemolytic cycle surrounding the colony of S. pyogenes on bloody plate.

A. Green cycle in diameter of 1-2mm;
B. Transparent cycle in diameter of 1-2mm;
C. Transparent cycle in diameter of 2-4mm;
D. Green cycle in diameter of 2-4mm;

查看答案