Criteria
Amsel diagnostic criteria and microbial and epidemiologic associations[31]
Bacterial vaginosis:
Vaginal pH >4.5
Whiff test
Clue cells (vaginal epithelial cells with distinctive stippled appearance in saline wet mount by being covered with bacteria)
Adherent white vaginal discharge.
Nugent criteria[32]
Vaginal Gram stain of the bacterial flora may help to identify women with bacterial vaginosis. The Nugent score is derived from an estimation of the different proportions of bacterial morphotypes present, to give a score between 0 and 10:
<4 normal
4 to 6 intermediate
>6 bacterial vaginosis.
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