29th April 2024

A 28-year-old woman presents with a three-day history of an offensive, fishy-smelling vaginal discharge.

A 28-year-old woman presents with a three-day history of an offensive, fishy-smelling vaginal discharge. She reports no pain, itching, or irritation. She is sexually active with one partner and uses condoms inconsistently. On examination, the discharge is thin, grey-white, and coats the vaginal walls. The pH of the vaginal fluid is found to be above 4.5. There is a positive whiff test after adding a drop of 10% potassium hydroxide to the vaginal secretions.

Which is the most likely diagnosis underlying the clinical presentation?