8. Lactobacilli constitute the normal flora of
A.prepubertal vagina
B.adult vagina
C.post-menopausal vagina
D.none of these
9. Which of the following bacteria is gram-negative cocci?
A.Veillonella
B.Peptococcus
C.Peptostreptococcus
D.Sporosarcina
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
11. The commonest bacterial cause of cervicofacial actinomycosis is
A.A. naeslundii
B.A. viscosus
C.A. israelii
D.A. meyeri
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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