A sexually active female presented with complains of a milky, homogenous, malodorous (“fishy” odour), non irritating discharge. ‘Clue cells’ are seen microscopically from the vaginal discharge. Clue cells are seen in:
**Core Concept**
The patient's presentation of a milky, homogenous, malodorous vaginal discharge, particularly the presence of 'clue cells', is suggestive of bacterial vaginosis (BV). Clue cells are vaginal epithelial cells that have bacteria attached to their surface, often seen in BV.
**Why the Correct Answer is Right**
The presence of clue cells is a diagnostic hallmark of bacterial vaginosis. The bacteria that cause BV, such as Gardnerella vaginalis, adhere to the vaginal epithelial cells, making them appear stippled or granular under microscopic examination. This adherence is due to the bacteria's ability to produce enzymes that break down the vaginal epithelial cell membrane, allowing them to attach and colonize the cells. The malodorous discharge is a result of the anaerobic bacteria present in the vaginal flora producing volatile organic compounds.
**Why Each Wrong Option is Incorrect**
**Option A:** Trichomoniasis is a sexually transmitted infection caused by the protozoan Trichomonas vaginalis, which can also present with a malodorous discharge. However, clue cells are not a characteristic feature of trichomoniasis.
**Option B:** Yeast infections, such as candidiasis, typically present with a thick, white, cottage cheese-like discharge, not a milky, homogenous discharge.
**Option C:** Chlamydia and gonorrhea are bacterial sexually transmitted infections, but they do not typically cause a malodorous discharge or the presence of clue cells.
**Clinical Pearl / High-Yield Fact**
Bacterial vaginosis is a common cause of vaginal discharge in sexually active women, and its diagnosis can be made using the Amsel criteria, which includes the presence of at least three of the following: clue cells, a thin, white or grayish discharge, a pH of the vaginal fluid > 4.5, and a fishy odor.
**Correct Answer: C. Gardnerella vaginalis**