Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Characteristics associated with Lactobacillus iners-dominated vaginal microbiota

Full text
Author(s):
Novak, Juliano [1] ; Ravel, Jacques [2] ; Ma, Bing [3] ; Tafner Ferreira, Carolina Sanita [1] ; Tristao, Andrea da Rocha [4] ; Silva, Marcia Guimaraes [1] ; Marconi, Camila [1, 5]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ, Med Sch, Dept Pathol, UNESP, Botucatu, SP - Brazil
[2] Univ Maryland, Dept Microbiol & Immunol, Baltimore, MD 21201 - USA
[3] Univ Maryland, Sch Med, Inst Genome Sci, Baltimore, MD 21201 - USA
[4] Sao Paulo State Univ, Med Sch, Dept Gynecol & Obstet, UNESP, Botucatu, SP - Brazil
[5] Univ Fed Parana, Dept Basic Pathol, Curitiba, Parana - Brazil
Total Affiliations: 5
Document type: Journal article
Source: SEXUALLY TRANSMITTED INFECTIONS; SEP 2021.
Web of Science Citations: 1
Abstract

Objective The protective role of Lactobacillus iners in the vaginal microbiota has been questioned. Recent studies have shown that L. iners is the dominating taxon in a large subset of women worldwide. The aim of this study was to identify sociodemographic, behavioural and clinical variables associated with L. iners-dominated community state type (CST) III in Brazilian women of reproductive age. Participants and methods This study leveraged microbiota compositional data generated by sequencing of the V3-V4 16S rRNA gene from vaginal samples collected from 442 participants enrolled in a previous cross-sectional study that included 609 women in five geographical regions of Brazil. A total of 167 (27.4%) participants were excluded from the current study as they did not present a Lactobacillus-dominated vaginal microbiota. Data on sociodemographic and behavioural characteristics of the study population were obtained through face-to-face interviews. Participants were assigned to two study groups: those with L. iners-dominated CST III (n=222) and those with three distinct CSTs (I, II or V) dominated by another Lactobacillus spp. (n=220). Logistic regression analysis using a stepwise method was performed to test association between CST III and participants' characteristics, considering their OR and 95% CIs. Results Among the population characteristics assessed, L. iners-dominated CST III was independently associated with having two or more sexual partners (OR 3.27; 95% CI 1.50 to 7.11) and microscopic detection of Candida sp. on vaginal smears (OR 2.24; 95% CI 1.02 to 4.89). Other characteristics were inversely associated with CST III, including condom use (OR 0.59; 95% CI 0.38 to 0.91), higher educational level (OR 0.61; 95% CI 0.41 to 0.91) and diet containing milk/dairy intake (OR 0.43; 95% CI 0.20 to 0.90). Conclusion Unprotected sex practices, number of sexual partners and lower educational levels may be useful for identifying women with L. iners-dominated microbiota and its suboptimal protective properties. L. iners microbiota does not seem to provide optimal protection against Candida sp. colonisation, warranting further investigation. (AU)

FAPESP's process: 12/16800-3 - Characterization of the vaginal microbiome of Brazilian women in reproductive age
Grantee:Márcia Guimarães da Silva
Support Opportunities: Regular Research Grants