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,
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Which statement is not right about streptococcus?
A. Gram positve;
B. obligate anaerobe,
C. It has no spore;
D. It has no flagellum
Which bacteria can not cause hemolysis on bloody agar plate?
A. Streptococcus varidans,
B. Streptococcus pyogenes,
C. Streptococcus nonhemolyticus
D. Staphylococcus aureus.
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;
Which species of streptococcus has higher virulence?
A. Streptococcus pyogenes,
B. Streptococcus varidans,
C. Streptococcus nonhemolyticus
D. All have
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