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Impact of oral administration of four Lactobacillus strains on Nugent score - systematic review and meta-analysis.

  • 2019-05-28
  • Beneficial Microbes 10(5)
    • M. Vrese
    • C. Laue
    • E. Papazova
    • L. Petricevic
    • Juergen Schrezenmeir

Abstract

We aimed at assessing the evidence for an effect on vaginal dysbiosis by oral administration of a mixture of Lactobacillus strains isolated from vaginal microbiota. For this purpose, we systematically reviewed the literature for randomised clinical trials (RCTs) in which the effect of oral administration of a mixture of four Lactobacillus strains (Lactobacillus crispatus LbV 88 (DSM 22566), Lactobacillus gasseri LbV 150N (DSM 22583), Lactobacillus jensenii LbV 116 (DSM 22567) and Lactobacillus rhamnosus LbV96 (DSM 22560)) on vaginal dysbiosis was examined based on Nugent score. Four RCTs were identified: a double-blind (DB)-RCT in 60 male-to-female transsexual women with neovagina; an open label RCT in 60 pregnant women with herpes virus infection; a DB-RCT in 36 women with bacterial vaginosis; a DB-RCT in 22 postmenopausal breast cancer patients receiving chemotherapy. Only in the three DB-RCTs Nugent score was assessed. The meta-analysis of these trials showed a significant reduction of Nugent score by probiotics compared to placebo in the fixed (standardised mean differences (SMD) -0.561; confidence interval (CI) -0.935 to -0.186; P=0.004 and random effect models (SMD -0.561; CI -0.935 to -0.186; P=0.004). The odds ratio (OR) of the cases presenting with improved Nugent score after probiotics compared to placebo treatment showed a significant effect in the fixed (OR=3.936; CI 1.702 to 9.100; P=0.001) and random effect model (OR=3.902; CI 1.681 to 9.059; P=0.001) Cochran's Q and I2 statistics showed no heterogeneity. This meta-analysis indicates that the oral intake of the pertinent Lactobacillus strains improves the microbial pattern in vaginal dysbiosis.

Keywords: Nugent score; lactobacilli; probiotics; vaginal microbiota.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Lactobacillus crispatus LBV88Improved Nugent ScoreBeneficial
Moderate
Lactobacillus crispatus LBV88Improved Vaginal MicrobiotaBeneficial
Large
Lactobacillus crispatus LBV 88Improved Vaginal Microbiota BalanceBeneficial
Moderate
Lactobacillus gasseri LBV 150NImproved Nugent ScoreBeneficial
Moderate
Lactobacillus gasseri LBV 150NReduced Nugent ScoreBeneficial
Moderate
Lactobacillus jensenii LBV 116Improved Nugent ScoreBeneficial
Moderate
Lactobacillus jensenii LBV 116Improved Vaginal Microbiota BalanceBeneficial
Moderate
Lactobacillus jensenii LBV 116Reduced Nugent ScoreBeneficial
Moderate
Lactobacillus rhamnosus LBV96Improved Vaginal MicrobiotaBeneficial
Large
Lactobacillus rhamnosus LBV 96Improved Nugent ScoreBeneficial
Moderate
Lactobacillus rhamnosus LBV 96Improved Vaginal Microbiota BalanceBeneficial
Moderate
Lactobacillus rhamnosus LBV 96Reduced Nugent ScoreBeneficial
Moderate

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