The present invention relates to a novel Lactobacillus plantarum strain ATG-K2, ATG-K6 or ATG-K8, and a composition for preventing or treating vaginitis comprising same, wherein the Lactobacillus plantarum strain ATG-K2, ATG-K6 or ATG-K8 have excellent antibacterial effects against various pathogenic strains as well as Candida albicans and Gardnerella vaginalis which are causative bacteria of vaginitis, and thus can be easily used as a composition for treating bacterial vaginitis, candida vaginitis, etc., or as a health functional food for preventing or ameliorating these diseases.
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