Genomic insights into the potency and functional roles of Lactobacillus species in term and preterm births.

The vaginal microbiome, typically dominated by Lactobacillus species, plays a key role in reducing the risk of preterm birth (PTB) by protecting against infections. In this study, we sequenced 133 Lactobacillus genomes isolated from the reproductive tracts of pregnant Indian women. Genomic analysis identified genes linked to pathogen resistance and anti-inflammatory functions. Further proteome analysis of cell-free supernatant revealed antimicrobial properties, including lysin and bacteriocin, while antibacterial tests confirmed their ability to inhibit reproductive tract pathogens. These findings suggest that Lactobacillus strains protect against harmful microbes, potentially reducing infection risks and PTB. This Lactobacillus consortium holds promise for developing biotherapeutics aimed at improving maternal health.