ABSTRACTThe effect of sodium salts of cholic, deoxycholic, chenodeoxycholic, glycocholic and taurocholic acids and of Bacto‐bile salts, Bacto‐bile salts #3 and Bacto‐oxgall on the recovery of nine strains representing seven serotypes (0:3, 0:8, 0:9, 0:11, 24, 0:12, 25, 0:16, 0:17) ofYersinia enterocoliticawas determined. Serotypes 0:3, 0:8, 0:9 and 0:17 were resistant to 3 sodium taurocholate, 3 Bacto‐bile salts or 3 Bacto‐oxgall. Serotypes 0:11, 23, 0:12, 25, 0:16 and 0:17 were significantly inhibited by 3 sodium deoxycholate, 2.5 chenodeoxycholate and 3 Bacto‐bile salts #3. Differences in the inhibitory effects of bile salt mixtures could not be explained only on the basis of their bile acid composition as determined by gas‐liquid c
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