| Bacterial vaginosis | Vaginal candidiasis | Trichomoniasis | |
|---|---|---|---|
| Sexually transmitted? | no | no | yes |
| Risk factors | sexually active, new partner, IUD use | sexually active, antibiotic use, pregnancy, corticosteroid use, diabetes, immunocompromised | multiple partners |
| Asymptomatic | 50% | 20% | 10-50% |
| Symptoms | vaginal discharge with fishy odour | vaginal discharge with itch and external dysuria or superficial dyspareunia | vaginal discharge with itch and dysuria |
| Signs | copious thin white or grey discharge | white, clumpy, curd-like discharge with erythema of the vagina and vulva | off-white to yellow frothy discharge with erythema of vulva and cervix, including "strawberry cervix" |
| Microscopy | clue cells, abnormal bacteriology | buddy yeast with pseudohyphae | trichomonads |
| Whiff test | positive | negative | negative |
| Treatment | metronidazole or clindamycin | antifungals | metronidazole, and treat partner |
