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Journal of Dairy Science Vol. 73 No. 4 905-911
© 1990 by American Dairy Science Association ®
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Factors to Consider When Selecting a Culture of Lactobacillus acidophilus as a Dietary Adjunct to Produce a Hypocholesterolemic Effect in Humans

S. E. Gilliland 1 and D. K. Walker 1

1 Animal Science Department, Oklahoma State University, Stillwater 74078-0425

Significant variations in bile tolerance and ability to assimilate cholesterol were observed among 12 cultures of Lactobacillus acidophilus of human origin. The degree of bile tolerance as measured by rapidity of growth in MRS broth supplemented with .3% oxgall could not be predicted by the rapidity of growth in the broth without oxgall. There was no apparent direct relationship between bile tolerance and cholesterol assimilation. However, among the cultures that most actively assimilated cholesterol, there were significant differences in bile tolerance. The most active cholesterol-assimilating cultures also varied in the ability to produce bacteriocins. A culture of L. acidophilus of human origin, which assimilates cholesterol, grows well in presence of bile, and produces bacteriocins can be selected for use as a dietary adjunct for humans. A culture of L. acidophilus possessing all these characteristics should have an advantage over one that does not in establishing and functioning in the intestinal tract to assimilate cholesterol.

Key Words: Lactobacillus acidophilus • dietary adjunct • cholesterol

Submitted on May 5, 1989
Accepted on September 25, 1989




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