Amsel’s criteria

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

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