Document Detail

Variable response to exogenous Lactobacillus acidophilus NCFM consumed in different delivery vehicles.
MedLine Citation:
PMID:  12392539     Owner:  NLM     Status:  MEDLINE    
AIMS: To study the effects of the delivery vehicle for Lactobacillus acidophilus on the human faecal microbiota. Our hypotheses were that (i) the delivery vehicle would influence faecal lactobacilli numbers and (ii) consumption of Lact. acidophilus would influence the populations of Bifidobacterium and hydrogen sulphide-producing bacteria. METHODS AND RESULTS: Ten subjects each received Lact. acidophilus with skim milk or water. Lactobacillus, Bifidobacterium and hydrogen sulphide-producing bacterial populations were analysed before, during and after each treatment. Regardless of the vehicle, faecal lactobacilli populations changed during treatment. Bifidobacteria and the hydrogen sulphide-producing bacteria underwent no statistically significant population changes. Intra- and intersubject variability was observed. CONCLUSIONS: The vehicle in which Lact. acidophilus was delivered did not influence faecal lactobacilli numbers. Consumption of Lact. acidophilus did not influence the populations of Bifidobacterium and hydrogen sulphide-producing bacteria. The lactobacilli populations of subjects were variable. The fed lactobacilli did not appear to colonize the gastrointestinal tract. SIGNIFICANCE AND IMPACT OF THE STUDY: We provide evidence that (i) there was no collective advantage to using skim milk as a delivery vehicle vs water; (ii) exogenous Lact. acidophilus did not affect endogenous bifidobacteria or hydrogen sulphide-producing bacteria; (iii) data should be carefully examined before pooling for analysis and (iv) continuous feeding was required to maintain an elevated lactobacilli population.
J Varcoe; C Zook; J Sui; S Leighton; F Busta; L Brady
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied microbiology     Volume:  93     ISSN:  1364-5072     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  2002  
Date Detail:
Created Date:  2002-10-23     Completed Date:  2003-02-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  900-6     Citation Subset:  IM    
Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108-6099, USA.
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MeSH Terms
Bifidobacterium / isolation & purification,  metabolism
Feces / microbiology
Hydrogen Sulfide / metabolism*
Lactobacillus acidophilus / growth & development*,  metabolism
Middle Aged
Time Factors
Reg. No./Substance:
0/Vehicles; 7783-06-4/Hydrogen Sulfide

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