Which symptom is NOT associated with bacterial vaginosis diagnosis?

Bacterial vaginosis (BV) is characterized by an imbalance of the normal vaginal flora, leading to specific clinical features and symptoms. Symptoms of BV typically include a thin, gray, or white vaginal discharge that has a fishy odor, especially after intercourse. Additionally, the vaginal pH in BV is often elevated, typically greater than 4.5, which is another key diagnostic criterion.

A positive whiff test, which involves the application of potassium hydroxide (KOH) to a sample of vaginal discharge, results in a fishy odor due to the release of amines from decaying vaginal cells. All of these symptoms are commonly associated with a diagnosis of bacterial vaginosis.

In contrast, persistent itching is not a typical symptom of BV. While some patients may experience mild irritation, significant itching is more characteristic of other conditions such as vulvovaginal candidiasis or allergic reactions. Therefore, persistent itching would not be considered a differentiating symptom for bacterial vaginosis, making it the correct response for this question.