Related Experiment Video
Updated: Aug 21, 2026

Evaluation of the Efficacy of Organic Peroxyacids for Eradicating Dairy Biofilms Using an Approach Combining Static and Dynamic Methods
Published on: December 9, 2022
[Hydrogen peroxide produced by Lactobacillus species as a regulatory molecule for vaginal microflora]
Magdalena Strus1, Monika Brzychczy-Włoch, Piotr Kochan
1Collegium Medicum UJ w Krakowie.
Abstract:
A total of 33 strains of Lactobacillus belonging to 9 species, isolated from vagina, were tested for production of hydrogen peroxide. We observed that the following species: L. delbrueckii, L. acidophilus, L. crispatus, L. johnsonii and L. gasseri dominated over other species in secretion of hydrogen peroxide to the growth medium. Concentration of this substance amounted from 0.05 to 1.06 mM (in case of strong aeration the concentration increased up to 1.8 mM). Moreover, killing properties of the pure hydrogen peroxide exerted toward Escherichia coli and Candida albicans were less prominent than these of the supernatants of cultures of Lactobacillus strains producing H2O2.
Related Concept Videos
Microbiota of the Urogenital Tract
Surface Membrane Barriers
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
Microbes in Food Production
Production of Organic Acids
Probiotics
Microbes in the Production of Fermented Foods

