How to distinguish between a fungal (yeast) infection and a trichomoniasis infection

Vaginitis—i.e., vaginal inflammation—is a group of disorders characterized by symptoms including pruritus (itching), burning, irritation, and abnormal vaginal discharge in the vulva and vagina. It encompasses candidal vaginitis (also known as vulvovaginal candidiasis) and trichomonal vaginitis. The former is caused by infection with Candida species (commonly *Candida albicans*), while the latter results from infection with the protozoan *Trichomonas vaginalis*. So how can one differentiate between candidal and trichomonal vaginitis? Below, we address this question.

How to Differentiate Candidal from Trichomonal Vaginitis

1. Clinical Presentation

Candidal vaginitis typically presents with thick, white, curd-like or “cottage cheese”–appearing vaginal discharge, accompanied by pronounced pruritus of the vulva—often worse at night. In contrast, trichomonal vaginitis commonly manifests with thin, purulent, frothy, foul-smelling, grayish-yellow or yellowish-white vaginal discharge. Patients may experience pruritus of the vulva and vaginal introitus, along with intermittent burning, pain, or dyspareunia.

2. Gynecological Examination

In candidal vaginitis, physical examination reveals erythema and edema of the vulva, as well as erythema and edema of the vaginal mucosa, with adherent white plaques on the inner surface of the labia minora and vaginal walls. In trichomonal vaginitis, vaginal mucosal hyperemia is observed; severe cases may show scattered petechiae, and cervical petechiae may produce a characteristic “strawberry cervix.”

Knowledge Extension: Preventive Measures

1. Avoid Indiscriminate Antibiotic Use

Frequent or inappropriate use of antibiotics disrupts the normal vaginal flora, promoting overgrowth of pathogenic organisms and thereby increasing the risk of vaginitis. Similarly, excessive vaginal douching or over-cleaning can disturb the natural vaginal microenvironment, paradoxically facilitating bacterial proliferation. For routine external genital hygiene, plain clean warm water suffices.

2. Choose Underwear Wisely

Opt for breathable undergarments made of natural fibers such as 100% cotton. Underwear should be laundered separately to prevent cross-contamination from outer garments. This is especially important for women diagnosed with vaginitis—or those living with affected individuals—who must pay particular attention to hygiene: underwear should be thoroughly dried in direct sunlight whenever possible.

3. Maintain Personal Hygiene

Keep the external genital area clean and dry; change underwear frequently. Towels, basins, and other personal items used for genital care should be dedicated solely to the individual. Used underwear, towels, and basins should be washed thoroughly and scalded with boiling water. When visiting public facilities—including restrooms, swimming pools, and communal baths—avoid contact with shared items to minimize the risk of cross-infection. After defecation, always wipe front-to-back to prevent fecal contamination of the genital area.

The above outlines key points for distinguishing candidal from trichomonal vaginitis. We hope this information proves helpful.