Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Clue cells are vaginal epithelial cells that are covered with bacteria, giving them a stippled appearance under a microscope. They are a key diagnostic indicator of bacterial vaginosis.
5 Must Know Facts For Your Next Test
Clue cells are typically identified using a wet mount preparation of vaginal discharge.
The presence of clue cells indicates an overgrowth of anaerobic bacteria, such as Gardnerella vaginalis.
A high number of clue cells is one of the Amsel criteria used for diagnosing bacterial vaginosis.
Clue cells have indistinct borders due to the coating of bacteria obscuring their edges.
They can be differentiated from normal epithelial cells by their granular appearance and lack of clear cell margins.