J Infect Dis 214 (Suppl 1): S1-S5, 2016. doi: 10.1093 / infdis / jiw121 Symptoms and Signs of Bacterial Vaginosis Vaginal discharge due to bacterial vaginosis is yellow-green or gray, thin, and malodorous, usually with a fishy odor that often becomes stronger when the discharge is more alkaline—after coitus and during menses.