Influence of some nutrients and bile salt on the production of antimicrobial agents by bifidobacteria [electronic resource].
Language: English Summary language: Arabic Description: p.157-170Other title:- تأثير بعض المواد الغذائية وأملاح الصفراء على إنتاج المواد المضاده للبكتريا بواسطة بكتريا ال bifidobacteria [Added title page title]
- Egyptian journal of dairy science, 2005 v. 33 (2) [electronic resource].
Seven strains of bifidobacteria were screened for their inhibitory activity. Bif. bifidum ATCC29521, Bif. bifidum ATCC156%, Bif.longum NCFB2299, Bif. longum BL-04, Bij infantis ATCC15567, Bif. catenulateum ATCC18371 and Bif. lactis BL-01 produced antimicrobial substances with a wide spectnun of antimicrobial activity. Cell free culture of all bifidobacteria strains inhibited strongly the growth of E. coli ATCC69337, Staphylococcus aureus ATCC2023l, Bacillus cereus ATCC33018, Pseudomonas aeruginosa ATCC9027, E. coli 0157-H7, Staph, aureus, Bacillus cereus, Salmonella typhi and Salmonella enteritidis and slightly the growth of lactic acid bacteria. Supplementation of media with cysteine + glycine, inulin, hydrolyzed whey protein, whey protein hydrolysate, tomato juice and carrot juice increased the production of antimicrobial agents by all bifidobacteria strains, while bile salt decreased their production. The increase or decrease of antimicrobial agents production was proportional to the rate of supplementation. Bif. longum BL-04 and Bif. bi.fidum ATCC 29521 exhibited the highest inhibitory activity. It seems that the production of antimicrobial agents by bifidobacteria is species and strain dependent.
Includes references.
Summary in Arabic.
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