Vaginal discharge

	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