Ans C. Bacteria adherent to lining vaginal epithelial cellsGardnerella vaginalis, facultatively anaerobic gram-variable rod, is one of the organisms responsible for bacterial vaginosis (BV).The vaginal discharge of BV is characteristically described as a thin, gray, homogeneous fluid that is adherent to the vaginal mucosa. A fishy vaginal odour, which is paicularly noticeable following coitusis present.Demonstration of clue cells on a saline smear is the most specific criterion for diagnosing BV.The whiff test may be positive in up to 70% of BV patients.The vaginal discharge of patients with BV is notable for its lack of polymorphonuclear leukocytes (PMNs), typically 1 or less than 1 PMN per vaginal epithelial cell.