Which organism is most commonly responsible for causing bacterial vaginosis?

Gardnerella vaginalis is the organism most commonly responsible for causing bacterial vaginosis. This condition arises due to an imbalance in the normal flora of the vagina, where there is a decrease in Lactobacillus species (beneficial bacteria), leading to an overgrowth of other organisms, including Gardnerella vaginalis. Although it is important to note that bacterial vaginosis is not a classic infection but rather a condition characterized by this imbalance, Gardnerella vaginalis plays a central role in its pathogenesis.

The condition is often diagnosed through clinical criteria and might be confirmed by laboratory tests, which can include the detection of increased levels of Gardnerella vaginalis, indicating its significant contribution to the disturbance of the normal vaginal ecosystem. Recognizing Gardnerella vaginalis as the principal organism involved helps guide healthcare professionals in understanding, diagnosing, and managing bacterial vaginosis effectively.