Amsel criteria for diagnosis of bacterial vaginosis. It occurs when the balance of bacteria that nat

Amsel criteria for diagnosis of bacterial vaginosis. It occurs when the balance of bacteria that naturally occur in the vagina becomes disrupted (usually the lactobacilli number goes down), so some get to predominate leading to symptoms of an infection. IT IS NOT AN STI. One of the common causes is excessively cleaning the vagina. Patients like it when you emphasise this. 

Usually they’re anaeroboes so treat them with metronizadole. No need to treat the partner. Tah dah.