This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
A middle aged female complained about milky discharge with fishy odor. Microscopic examination of vaginal discharge shows clue cells. What is she suffering from? 
Select and explain. 
A. Bacterial vaginosis, B. Herpes virus, C. Syphilis, D. Toxoplasmosis
A: Bacterial vaginosis
Answer: A: Bacterial vaginosis 
Explanation: Criteria for bacterial vaginosis: Elevated vaginal pH (>4.5) Positive amine odor when vaginal fluid is mixed with 10% potassium hydroxide (KOH)--the so-called "whiff" test Presence of clue cells (squamous epithelial cells covered with adherent bacteria) in a saline (wet mount) preparation of the vaginal fluid Homogenous milky or creamy vaginal discharge According to this criteria, bacterial vaginosis is present if three of the following findings are present. Ref: Schwebke J.R. (2007). Chapter 11. Bacterial Vaginosis. In J.D. Klausner, E.W. Hook III (Eds). CURRENT Diagnosis & Treatment of Sexually Transmitted Diseases.