What is the gardnerella treatment?

Metronadizole/Flagyl: You are referring to bacterial vaginosis. I would recommend the standard treatment of oral or vaginal flagyl. Intravaginal boric acid 600 mg at bed time provides symptomatic relief. The frequency can be gradually decreased to once or twice a week. You could try a probiotic preparation such as vsl #3 with 110 billion colonies of probiotic bacteria per capsule, but this therapy is unproven.