TABLE 4.

MICs of antibiotics for bifidobacteria after short-term oxgall stress^a

Organism	MIC (μg/ml)b of the following antibioticc for the indicated organism:
	Amp	Clo	Pen	Van	Kan	Neo	Par	Str	Chl	Ery	Tet	Nis
B. animalis ATCC 27536	0.98	125	0.98	1.9	500	125	125	125	1.9	1.9	125	0.98
B. bifidum R 0071	0.98	62.5	0.98	>500	500	62.5	125	125	3.9	3.9	62.5	0.98
B. bifidum ATCC 15696	0.98	62.5	0.98	>500	125	250	500	1.9	3.9	3.9	125	0.98
B. bifidum BB12	0.98	1.9	0.98	>500	500	250	250	500	1.9	3.9	3.9	3.9
B. breve ATCC 15700	3.9	3.9	0.98	>500	500	125	250	250	3.9	0.98	31.2	0.98
B. breve R0070	0.98	31.2	0.98	>500	500	62.5	125	125	3.9	0.98	62.5	0.98
B. infantis ATCC 15697	0.98	125	0.98	0.98	>500	500	500	250	0.98	3.9	250	3.9
B. longum ATCC 15707	0.98	125	0.98	>500	250	125	125	62.5	1.9	3.9	125	0.98
B. longum ATCC 15708	0.98	125	0.98	0.98	500	500	500	250	0.98	1.9	125	0.98
B. longum R0175	0.98	125	0.98	>500	500	62.5	125	125	1.9	1.9	125	3.9
B. longum P/N 601377	0.98	62.5	0.98	>500	250	62.5	62.5	125	1.9	3.9	62.5	3.9
B. pseudolongum ATCC 25562	0.98	62.5	0.98	0.98	500	250	500	250	0.98	3.9	125	0.98
B. thermophilum ATCC 25866	1.9	62.5	0.98	>500	500	125	250	250	3.9	3.9	125	0.98

^aOrganisms were exposed to 0.3% (wt/vol) oxgall for 90 min prior to 18 h of anaerobic growth in MRS broth, pH 6.5.

^bMedian of four repetitions.

^cAmp, ampicillin; Clo, cloxacillin; Pen, penicillin G; Van, vancomycin; Kan, kanamycin; Neo, neomycin; Par, paromomycin; Str, streptomycin; Chl, chloramphenicol; Ery, erythromycin; Tet, tetracycline hydrochloride; Nis, nisin A.