Trichomonas vaginalis culture (genital tract)

This test checks for trichomoniasis, a common sexually transmitted infection caused by a tiny parasite. Testing helps find the infection early so you can receive treatment, relieve your symptoms, and avoid passing the infection to your sexual partners.

Your healthcare provider may recommend this test if you have symptoms like unusual discharge, itching, burning during urination, or irritation in the genital area. It’s also used to diagnose infections in partners or during routine screening for sexually transmitted infections (STIs).

Before the test, your healthcare provider may ask about your symptoms and sexual history. You may be told to avoid douching or using vaginal creams, and if a urine sample is needed, try not to urinate for one to two hours before your appointment.

No special preparation is needed. You may be asked to clean the genital area gently before the sample is collected. The test involves taking a sample from the vagina (for women) or urethra (for men) using a sterile swab. This is usually done during a pelvic exam or a quick office visit.

The test is usually done with a swab of the affected area or with a urine sample. Your provider gently collects the sample, which is then sent to a laboratory and examined under a microscope or tested with a molecular method to detect the parasite.

The collected sample is placed in a special medium to grow *Trichomonas vaginalis* if present. The lab then examines the sample under a microscope to identify the parasite or its growth over time, typically within 48–72 hours.

A positive result means the parasite that causes trichomoniasis was found, and your provider will prescribe treatment, usually an antibiotic that is taken by mouth. A negative result means no infection was detected at the time of testing, but retesting may be needed if symptoms continue.

A positive result means the parasite is present and likely causing infection. A negative result means no parasite was found in the sample at the time of testing. Follow-up testing may be needed if symptoms persist or if you have risk factors for reinfection.