Vaginal discharge 

ConditionClinical presentation 
Trichomoniasis Greenish yellow frothy, strawberry cervix, motile flagellated protozoa on microscopy after adding saline
Vulvo-vaginal candidiasis What thick cheesy or curdy, acidic vaginal pH, yeast hyphae on microscopy after adding KOH
Bacterial vaginosis Thin homogenous discharge, positive Whiff test, clue cells on microscopy, pH > 4.5
Atrophic vaginitisThin, clear, friable mucosa
Irritant and allergic vulvo-vaginitisNo discharge