Infection through structured polymicrobial Gardnerella biofilms (StPM-GB).

Area of Science:

• Microbiology
• Infectious Diseases
• Gynecology

Background:

• Bacterial vaginosis (BV) has been traditionally viewed as a mono-infection.
• This study challenges the mono-infection paradigm by analyzing BV data.

Purpose of the Study:

• To investigate the microbial structure of bacterial vaginosis (BV).
• To understand the role of biofilms in BV pathogenesis.
• To evaluate treatment efficacy against BV-associated biofilms.

Main Methods:

• Utilized fluorescence in situ hybridization (FISH) to examine vaginal, uterine, fallopian tube, and perianal tissues.
• Compared samples from women with BV and healthy controls.

Main Results:

• Healthy vaginas lacked biofilms; BV was characterized by a structured polymicrobial (StPM) Gardnerella-dominated biofilm.
• This biofilm enveloped epithelial cells and was present in both genders, often occurring in pairs.
• Treatments like metronidazole suppressed but did not eradicate the biofilms; Gardnerella alone, outside the biofilm, was not BV.

Conclusions:

• The StPM-Gardnerella-biofilm is an infectious entity, not merely a collection of microbes.
• Biofilm formation is a complex process, possibly an evolutionary event.
• The biofilm's structure provides resistance to treatments and environmental challenges.