Comparison of detection methods for vaginal lactobacilli.

Abstract:

:Vaginal lactobacilli offer protection against microbiota imbalance and genitourinary tract infections. We compared vaginal lactobacilli in 50 Estonian women of child-bearing age applying culture-based methods, quantitative PCR and next-generation sequencing (NGS). The culture-based methods found three different lactobacilli: Lactobacillus crispatus, Lactobacillus jensenii and Lactobacillus gasseri. Using NGS revealed the presence of L. crispatus in 76%, Lactobacillus iners in 52%, L. jensenii in 47% and L. gasseri in 33% of the samples. According to qPCR, L. iners was present in 67% and L. crispatus in 64% of the samples. The proportions of L. crispatus revealed by qPCR and NGS were in good correlation (R=0.79, P<0.001), while that of L. iners correlated poorly (R=0.13, P>0.05). Good concordance for L. crispatus was also found between the results of the culture-based method and qPCR. Finally, good overlap between the results of the culture-based method and NGS was revealed: in case of a positive NGS result for L. crispatus, the same species was isolated in 95% of samples. The corresponding percentages were 82% for L. jensenii and 86% for L. gasseri. Our data indicate fairly general concordance of the three methods for detecting vaginal lactobacilli, except for L. iners. This points out the importance of standardisation of techniques, and the respective studies should involve cultures applying a medium suitable for the fastidious L. iners.

journal_name

Benef Microbes

journal_title

Beneficial microbes

authors

Smidt I,Kiiker R,Oopkaup H,Lapp E,Rööp T,Truusalu K,Štšepetova J,Truu J,Mändar R

doi

10.3920/BM2014.0154

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

747-51

issue

5

eissn

1876-2883

issn

1876-2891

pii

U357M43724H0902J

journal_volume

6

pub_type

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