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 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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11. Crystal violet blood agar is a selective medium for
A.β-haemolytic streptococci
B.Staphylococcus aureus
C.Corynebacterium diphtheriae
D.Mycobacterium tuberculosis

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