Trichomoniasis
Trichomoniasis is a curable parasitic sexually transmitted infection that can cause frothy discharge and itching, and is often silent in men.
Symptoms
- Frothy, yellow-green vaginal discharge, sometimes with an unpleasant smell
- Genital itching, soreness or redness
- Discomfort when urinating or during sex
- Usually no symptoms in men, occasionally urethral irritation
Causes and how it spreads
Trichomoniasis is caused by Trichomonas vaginalis, a microscopic parasite passed on through vaginal sex. Men often carry it without symptoms, which keeps it circulating between partners when only one person is treated.
How PVT tests for it
PVT tests for trichomoniasis with molecular (NAAT) testing on a vaginal swab or urine sample, processed at Lancet. Molecular testing is far more sensitive than the older microscope methods and picks up silent infections in men.
Treatment
Trichomoniasis is cured with a course of antibiotics. Alcohol must be avoided during treatment and for a short period afterwards, because it reacts badly with the medication. Partners are treated at the same time, and rechecking confirms clearance.
When to see a doctor
Test if you have unusual discharge, itching or discomfort, if a partner has been diagnosed, or as part of a routine screen. In pregnancy, trichomoniasis deserves particular attention because it is linked to early delivery.
Medically reviewed by Dr D. Moodley [DOCTOR_NAME_PLACEHOLDER], HPCSA [HPCSA_NUMBER_PLACEHOLDER]. Last reviewed 1 July 2026.
Questions about Trichomoniasis
Because trichomoniasis is usually silent in men, and an untreated male partner is the most common reason a woman's infection returns after treatment. Testing and treating both partners together breaks the cycle.
The antibiotic used for trichomoniasis interacts with alcohol and can cause flushing, nausea and vomiting. Avoid alcohol during the course and for at least 24 to 72 hours afterwards, depending on the medicine. Your doctor will give you the exact window.
It is usually more unpleasant than dangerous, but it should still be treated promptly. It increases vulnerability to other STIs including HIV, and in pregnancy it is associated with early delivery and low birth weight.
Yes, most often through reinfection from an untreated partner. Completing the full course, treating partners simultaneously, and waiting until treatment is finished before sex again all keep it from returning.
Book a private consult
Most patients are seen within the week at Milnerton or Table View. You can book by WhatsApp without saying why you are coming in.
R650 private doctor consult, paid upfront by cash or card. It covers the assessment, test selection, explanation of your first results, and a script where clinically appropriate. Lab tests are billed separately by the blood lab (Lancet). Medical aid is optional: you claim back yourself if you have it.