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Trichomonas vaginalis Antigen Detection (Urine)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of *Trichomonas vaginalis*, a microscopic parasite that can cause infections in the urinary tract and genital areas. It helps diagnose *trichomoniasis*, a common sexually transmitted infection.

Quick summary

["A simple urine test to detect a parasite linked to infections that may affect your urinary or reproductive health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
33905-1
Short code
Trichomonas #/area UrnS HPF
Synonyms
Trichomonas #/area UrnS HPF
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
microscopy-light-hpf
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Matters

Trichomoniasis is one of the most common sexually transmitted infections worldwide. If left untreated, it can cause discomfort, irritation, or even complications like urinary tract infections or increased risk of other STIs. Early detection through this test helps prevent complications and supports prompt treatment.

How the Test Works

The test uses a urine sample to detect specific antigens (proteins) produced by *Trichomonas vaginalis*. This is done through a rapid immunoassay method, which provides results in minutes. No special preparation is needed—just provide a clean urine sample.

What to Expect Before the Test

No special preparation is required. You may urinate into a clean container before your visit, or your provider may collect a urine sample directly. If you’re pregnant, inform your healthcare provider before testing, as some tests may not be recommended during pregnancy.

What to Expect After the Test

Results are typically available within minutes. If the test is positive, your provider will discuss next steps, which may include treatment with prescribed medication. If negative, further testing may be recommended if symptoms persist or risk factors are high.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Trichomonas Urine Test

Frequently asked questions

What are the possible causes of a positive result?
A positive result strongly suggests an active *Trichomonas vaginalis* infection. This could be due to recent exposure to the parasite, typically through sexual contact. Other factors, such as recent antibiotic use or immune conditions, may also influence test sensitivity, so follow-up testing may be advised.
What if I have symptoms but the test is negative?
Symptoms like itching, discharge, or burning during urination can sometimes appear even if the test is negative. If you have persistent symptoms, discuss them with your healthcare provider. They may recommend retesting or additional diagnostic methods, such as a wet mount exam of vaginal or urethral secretions.
Can I still have the infection if my partner tested negative?
Yes, infections like trichomoniasis can be asymptomatic in some partners. Both you and your partner should be tested and treated together to prevent reinfection and further spread.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy