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Trichomonas vaginalis Detection by Microscopy (Urine)

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

This test checks for the presence of *Trichomonas vaginalis*, a microscopic parasite that can cause vaginal or urethral infections in both men and women.

Quick summary

["A simple urine test to detect a common sexually transmitted parasite."]

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

Key facts at a glance

LOINC
53355-4
Short code
Trichomonas # Ur Comp Assist
Synonyms
Trichomonas # Ur Comp Assist
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
computer-assisted
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

Trichomonas vaginalis is a parasite that can cause irritation, discharge, or discomfort in the genital area. Detecting it early helps prevent complications like pelvic inflammatory disease or infertility.

How the Test Works

A small urine sample is collected and examined under a microscope to look for the parasite’s characteristic microscopic structures. This method is quick and often done in a doctor’s office or lab.

Preparation for the Test

No special preparation is needed. You may collect a midstream urine sample at home or provide a sample directly to your healthcare provider.

What to Expect After the Test

Results are typically available within a few days. If the test is positive, your provider will work with you to determine the best treatment and next steps.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Trichomonas Test

Frequently asked questions

How common is Trichomonas vaginalis infection?
Trichomonas vaginalis is one of the most common STIs in the U.S., affecting millions of people each year. Many infections go undetected because symptoms may be mild or absent.
What are the symptoms of Trichomonas vaginalis?
Symptoms may include vaginal discharge (often frothy and foul-smelling), itching, burning during urination or intercourse, or pelvic pain. Men may experience symptoms like discharge or discomfort during urination, though many men have no symptoms at all.
Can I get Trichomonas vaginalis from sharing personal items?
No, Trichomonas vaginalis is primarily spread through sexual contact. Sharing towels, toilet seats, or other personal items does not transmit the infection.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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