Journal
FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY
Volume 29, Issue 1, Pages 47-52Publisher
ELSEVIER SCIENCE BV
DOI: 10.1111/j.1574-695X.2000.tb01504.x
Keywords
probiotic; adjuvant effect; immunomodulation; Lactobacillus GG; Lactococcus lactis
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Thirty healthy volunteers were randomised into three different treatment groups and consumed Lactobacillus GG, Lactococcus lactis or placebo (ethyl cellulose) for 7 days. On days 1, 3 and 5, an attenuated Salmonella typhi Ty21a oral vaccine was given to all subjects to mimic an enteropathogenic infection. All subjects responded well to the vaccine, but no significant differences were observed in numbers of IgA-, IgG- and IgM-secreting, cells among the different groups. There was a trend towards a greater increase in specific IgA among the subjects receiving the vaccine in combination with Lactobacillus GG, Those receiving L. lactis with their vaccine evinced significantly higher CR3 receptor expression on neutrophils than those receiving either the placebo or Lactobacillus cc. These results indicate that probiotics may influence differently the immune response to oral S. typhi vaccine and that the immunomodulatory effect of probiotics is strain-dependent. (C) 2000 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
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