Amsel’s diagnostic criteria for bacterial vaginosis:
Three of four criteria must be met; establishes accurate diagnosis of bacterial vaginosis in 90 percent of affected women.
Homogeneous vaginal discharge, but color and amount may vary.
Amine fish-like odor when potassium hydroxide solution is added to vaginal secretions, and commonly called the “whiff test”.
Presence of greater than 20% of clue cells on microscopy, which is a highly significant criteria.
Vaginal pH greater than 4.5