TABLE 3.

Comparison of susceptibility rates of various species of the B. fragilis group isolated from blood

Antimicrobial agent	% S value(s)a
	B. fragilis	B. thetaiotaomicron	B. distasonis	B. ovatus	B. vulgatus	B. uniformis	B. caccae
Penicillin G	0	0	0	0	0	0	4, 32∗
Piperacillin	80	76	64	74	45	32, 32, 32∗	NT
Ticarcillin	69	68	16, 256	39	44	256	NT
Piperacillin-tazobactam	99.1	100	100	100	100	0.12, 0.25∗	0.5, 2∗
Ticarcillin-clavulanate	99.2	100	1, 32, 128, 128	77	100	8∗	NT
Ampicillin-sulbactam	95	98	77	84	88	1, 2, 2, 2∗	1, 16∗
Cefotaxime	74	39	36	46	50	32, 64, 64∗	NT
Ceftriaxone	69	8	17	11	0	NT	NT
Cefoxitin	90	70	53	88	69	1, 2, 16, 64∗	4, 32∗
Cefotetan	87	19	21	26	50	64, 128∗	NT
Cefmetazole	85	6	33	20	8, 16∗	128∗	NT
Ceftizoxime	81	76	64	81	56	32, 32∗	NT
Imipenem	99.2	100	100	100	100	100	0.03, 0.25∗
Meropenem	96	100	100	100	100	0.06, 0.12, 0.25∗	0.12, 2∗
Ertapenem	94	100	60	88	100	0.06, 0.12∗	0.25, 2∗
Trovafloxacin	100	92	100	90	92	0.03, 0.5∗	0.12, 2∗
Clindamycin	89	63	53	48	73	60	16, 16∗
Metronidazole	100	100	100	100	100	100	0.25, 0.5∗

^a∗, when four or fewer isolates were tested, the individual MICs are listed. NT, not tested.