6. Streptolysin O is

A. antigenic
B. oxygen-labile
C. heat-labile
D. all of these

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7. Cell wall protein of Streptococcus pyogenes crossreacts with human

A. synovial fluid
B. cardiac valves
C. myocardium
D. vascular intima

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8. Individuals suffering from primary atypical pneumonia have agglutinins to

A. Streptococcus MG
B. S avium
C. S mutans
D. Enterococcus faecalis

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9. Which of the following test(s) may establish a retrospective diagnosis of streptococcal infection?

A. Anti-DNase B test
B. ASO test
C. Streptozyme test
D. All of these

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10. The bacterial sore throat is caused by

A. Staphylococcus aureus
B. Haemophilus spp
C. Streptococcus pyogenes
D. Mycoplasma pneumoniae

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