Bacterial Vaginosis in Nepal — Symptoms, Diagnosis & Treatment The Commonest Cause of Abnormal Discharge — Diagnosed & Treated Correctly

What Bacterial Vaginosis Is

Bacterial vaginosis (BV) is commonest cause of abnormal vaginal discharge in women — a shift in vaginal microbiome where normal lactobacilli are replaced by anaerobic organisms (including Gardnerella). It is not classically a sexually transmitted infection — it is a dysbiosis — though it is associated with sexual activity and with new or multiple partners.

The typical presentation: thin, grey-white discharge with a characteristic fishy odor, often worse after sex. Many cases are asymptomatic — diagnosed incidentally on examination or screening. BV is distinguished from candida (which produces thick, itchy, cottage-cheese discharge) and trichomoniasis (a true STI) — distinction matters because treatments differ.

BV is treatable — typically with metronidazole or clindamycin — but ~50% of women experience recurrence within a year, which is honest part of management: first episode is straightforward; recurrent pattern needs a different approach.

Symptoms & Presentation

The characteristic picture: thin, homogeneous, grey-white discharge with a fishy odor — often most noticeable after sex (semen raises vaginal pH, which releases odor). Itching is typically absent or minimal — significant itch points more toward candida.

A substantial fraction of BV is asymptomatic — found on examination or screening. This matters because untreated BV is associated with increased HIV acquisition risk, increased susceptibility to other STIs, and in pregnancy with adverse outcomes including preterm delivery — so asymptomatic case is not always one to leave alone.

How BV Is Diagnosed

Diagnosis is clinical — most commonly by the Amsel criteria: thin homogeneous discharge, vaginal pH above 4.5, a positive whiff test (fishy odor when sample is mixed with potassium hydroxide), and clue cells (epithelial cells coated with bacteria) on microscopy. Three of four criteria diagnose BV.

Distinguishing BV from mimics is clinical task: candida produces thick, itchy discharge with normal pH; trichomoniasis produces greenish, frothy discharge and is a true STI; and possibility of cervicitis from chlamydia or gonorrhea is considered — which is why a proper assessment sometimes includes STI testing alongside vaginal assessment.

Treatment

BV is treated with metronidazole (oral or gel) or clindamycin — a short course, typically well tolerated. The caveat with metronidazole is alcohol interaction — avoid alcohol during treatment and for ~24–48 hours after.

Partner treatment is not routinely indicated for BV — it is a dysbiosis, not a classic STI — though it is considered in specific contexts (for example, female partners in same-sex couples where organism can pass between partners). The honest guidance is case-by-case rather than automatic.

The ~50% Recurrence

BV recurs in about ~50% of women within a year — dysbiosis re-establishes because underlying microbiome disruption is not fully understood and treatment suppresses rather than permanently restores. This is honest framing: BV treatment works for episode; recurrence is common enough to expect.

For recurrent BV, management changes: suppressive or maintenance metronidazole regimens, partner consideration in specific contexts, review of contributing factors (douching, new partners, smoking), and investigation of whether diagnosis is actually recurrent BV or a different persistent cause being repeatedly mistaken for it.

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