TABLE 2.

Induction and stability of resistance to metronidazole in 11 clinical Prevotella isolates, P. baroniae DSM 16972^T, and B. fragilis ATCC 25285^T

Strain (nimI genea)	MIC (μg/ml)
	Original	Postinduction	Poststability
P. baroniae DSM 16972T (+)	2	16	16
P. baroniae LBN 427 (+)	4	128	128
P. baroniae LBN 430 (+)	4	128	128
P. baroniae LBN 432 (+)	2	64	64
P. baroniae LBN 475 (+)	4	256	256
P. baroniae LBP19 (+)	1	128	128
P. bivia LBN 332 (−)	4	>256	>256
P. bivia LBN 371 (−)	4	>256	>256
P. bivia LBN 467 (−)	16	>256	>256
P. buccae LBN 465 (−)	0.5	128	64
P. nanceiensis LBN 293b (−)	2	256	256
P. nanceiensis LBN 410 (−)	1	256	256
B. fragilis ATCC 25285T (−)	0.5	256	128

^a+, positive; −, negative.