8. Lactobacilli constitute the normal flora of
A.prepubertal vagina
B.adult vagina
C.post-menopausal vagina
D.none of these

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9. Which of the following bacteria is gram-negative cocci?
A.Veillonella
B.Peptococcus
C.Peptostreptococcus
D.Sporosarcina

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10. The commonest species of Bacteroides in fragilis group, which causes human infection, is
A.B vulgatus
B.B fragilis
C.B ovatus
D.B merdae

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11. The commonest bacterial cause of cervicofacial actinomycosis is
A.A. naeslundii
B.A. viscosus
C.A. israelii
D.A. meyeri

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12. Which of the following bacteria is moderately saccharolytic?
A.Bacteriodes fragilis
B.B gingivalis
C.B melaninogenicus
D.B levii

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