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Trichomoniasis Screening Test

A trichomoniasis test checks for the Trichomonas vaginalis parasite, the cause of trich. It uses a urine sample and is used for routine sexual health screening or after a possible exposure.

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Quick answer

The trichomoniasis test screens for the parasite Trichomonas vaginalis, which causes the infection commonly called trich. A urine sample is collected and tested, usually with a molecular method that detects the organism's genetic material. The test is used for routine sexual health checks, after a possible exposure, or when symptoms are present. A qualified healthcare provider interprets the result.

What this test measures

Trichomoniasis is one of the most common non-viral sexually transmitted infections. The parasite lives in the genital tract and passes between partners during sexual contact. A significant share of infections produce no symptoms, so a person can carry and transmit it without knowing. That is why screening is valuable even when someone feels well.

Testing relies on a urine sample that the laboratory examines for the parasite. Molecular testing, which looks for the organism's genetic material, is more sensitive than older microscopy methods, so it can detect infections that might otherwise be missed. Collection is quick, and results are reported as positive or negative against a clear cutoff.

A positive result does not mean a person did anything wrong; it simply shows an infection that can be addressed. A healthcare provider can discuss care and may recommend checking for other sexually transmitted infections at the same time. A negative result applies to the sample collected, so timing after a possible exposure matters.

  • Trichomonas vaginalis DNA
  • Trichomonas vaginalis RNA
  • Trichomonas antigen (when used)
  • Chlamydia trachomatis if co-tested
  • Neisseria gonorrhoeae if co-tested
  • Trichomonas vaginalis culture (when used)

Why people order this test

  • Routine sexual health screening
  • Testing after a possible exposure
  • Checking symptoms such as discharge or irritation
  • Clarifying risk when a partner has been diagnosed
  • Screening during pregnancy when recommended by a provider
  • Follow-up testing as part of a broader sexually transmitted infection check
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How to prepare

This test uses a urine sample, and some laboratories ask you to avoid urinating for a period before collection. Follow the instructions provided with the order and at the collection site.

Understanding your results

Results are typically reported within one to three business days. A positive result means the parasite was detected, and a healthcare provider can explain the next steps. A negative result reflects the sample at that time and may need to be repeated after recent exposure.

Trichomoniasis Screening Test by state

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Frequently Asked Questions

What does a trichomoniasis test look for?

It looks for Trichomonas vaginalis, the parasite that causes trichomoniasis, usually by detecting its genetic material in urine.

Is the test accurate?

Molecular methods used for this test are highly sensitive and specific compared with older microscopy, though timing after exposure affects results.

Can I have trich without knowing?

Yes. Many infections cause no symptoms, which is why routine screening can find infections that would otherwise go unnoticed.

Do I need to fast?

No fasting is required. Follow any collection instructions, including any guidance about timing urination before the sample.

How are results handled?

Testing is handled confidentially. A healthcare provider can explain how results and reporting are managed in your jurisdiction.

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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.

Medical disclaimer. The information on LabOrdering.com is educational only and is not medical advice, diagnosis, or treatment. Reference ranges and clinical guidance vary between laboratories. Always consult a qualified healthcare provider about your own results and care.