Serum or Plasma *Trichomoniasis Antibody, Qualitative (IgG)
This test checks for antibodies to the parasite *Trichomonas vaginalis*, which can indicate past infection with this sexually transmitted infection (STI). Antibodies develop in the body after exposure and may remain detectable for years.
["This test helps diagnose past exposure to *Trichomonas*, an STI caused by a parasite that can affect the genitals."]
Key facts at a glance
- LOINC
- 13287-8
- Short code
- T gondii Ab CSF-aCnc
- Synonyms
- T gondii Ab CSF-aCnc
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like unusual discharge, itching, or discomfort in the genital area, or if you’ve been exposed to *Trichomonas*. It’s also sometimes used in screening for sexually transmitted infections (STIs) in certain populations.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. If testing plasma, your blood may be collected in a special tube that separates plasma from blood cells.
What the Test Results Mean
A positive result means your body has detected antibodies to *Trichomonas*, suggesting past infection. A negative result means no detectable antibodies were found at this time, but you may still be at risk if exposed. Follow-up testing or treatment may be recommended based on your symptoms and medical history.
What to Do If You Have Symptoms
If you experience symptoms like itching, burning during urination, or unusual discharge, contact your healthcare provider. *Trichomonas* can cause irritation and discomfort, and treatment is available to clear the infection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is not used to diagnose *Trichomonas* infection in real time because the parasite itself is not measured. Instead, it detects antibodies produced by your immune system in response to past exposure. While useful for identifying past infections, it does not confirm current infection. If you suspect an active infection, your provider may recommend direct testing for the parasite.
Short name
Trichomoniasis Antibody (IgG) – Qualitative
Frequently asked questions
Can this test detect an active *Trichomonas* infection?
How long after exposure might I get a positive result?
Is this test covered by insurance?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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