References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
Trichomoniasis is one of the most common curable STIs, but it’s often missed because many people have no symptoms. Testing is quick and accurate, using a urine sample or swab that checks for the parasite directly. If you have any symptoms or a new sexual partner, testing is straightforward to arrange.
Here’s how it works.
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How Trichomoniasis Testing Works
| Test Method | Sample | Accuracy |
|---|---|---|
| NAAT (nucleic acid test) | Urine or swab | Very high |
| Wet mount microscopy | Vaginal swab | Moderate — depends on lab experience |
| Culture | Vaginal swab | Good but slower |
| Rapid point-of-care | Swab | Variable |
When to Test
- Unusual vaginal or urethral discharge
- Itching, burning or irritation
- Pain during sex or urination
- New sexual partner
- Partner has tested positive
- As part of a routine STI screen
Getting Tested
- NHS sexual health clinics offer testing as part of a full STI screen
- GPs can request testing
- Some home kits include trichomoniasis testing — check before ordering
Sample Collection
- Women — vaginal self-swab works well
- Men — urine sample
- Testing is not routinely included in all STI screens, so you may need to ask
Understanding Results
Results are usually back within a few days. A positive result means you have active trichomoniasis and need treatment. A negative result is reliable when the test is taken at least 1-2 weeks after exposure.
Treatment
- Metronidazole 400-500mg twice daily for 5-7 days, or single 2g dose
- Avoid alcohol during and for 48 hours after treatment
- Partners should be tested and treated at the same time
- Avoid sex until both of you have completed treatment
Follow-Up
Test of cure isn’t usually needed for trichomoniasis. Retesting 3 months later can catch reinfection, especially if partners aren’t treated.
Read more: What is trichomoniasis? | Trichomonal vaginitis | Untreated trichomoniasis
Frequently Asked Questions
Is trichomoniasis testing included in all STI screens?
Not always. Ask your service if you want it included.
Can I test at home?
Yes, some home kits include trichomoniasis. Check the details before ordering.
How soon after exposure can I test?
1-2 weeks is reliable.
Related reading
- Blood Test for Syphilis, Hepatitis B and Hepatitis C
- Can You Have Chlamydia and Test Negative?
- Can You Test for STIs While on Your Period?
- Hepatitis B Core Antibody Test Explained
- Hepatitis B Test Kits: What to Know
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
