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T. gondii IgG Antibody (Serum/Plasma) - Immunoassay

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

This test checks for antibodies to the parasite *Toxoplasma gondii*, which can cause infections like toxoplasmosis. It helps determine if your body has ever been exposed to this parasite.

Quick summary

["This test helps assess past exposure to Toxoplasma, a parasite that may affect pregnancy or immune health."]

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

Key facts at a glance

LOINC
5391-8
Short code
T gondii IgM Titr SerPl IF
Synonyms
T gondii IgM Titr SerPl IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order this test if you have symptoms like fever, muscle aches, or fatigue that could be linked to a Toxoplasma infection. It’s also commonly checked during pregnancy to ensure the baby isn’t at risk. Additionally, people with weakened immune systems may need this test to monitor for infections.

What to Expect Before the Test

You’ll typically have a small needle inserted into your arm to draw blood. The process takes just a few minutes, and you may feel a brief pinch. No special preparation is needed, but let your doctor know if you’re on blood-thinning medication or have a bleeding disorder.

What the Results Mean

If you test positive for *T. gondii* IgG antibodies, it means your body has likely been exposed to the parasite at some point. This doesn’t always mean you’re currently sick, but it indicates past infection. If you’re pregnant or have a compromised immune system, this result may prompt further testing or monitoring.

Common Reasons for Testing

Pregnant individuals are often tested for Toxoplasma antibodies early in pregnancy to check for exposure, as the parasite can cross the placenta and affect the fetus. People with HIV/AIDS, organ transplants, or other immune conditions may also need this test to prevent severe infections.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

IgG Antibody to Toxoplasma gondii

Frequently asked questions

What symptoms might indicate you need this test?
Symptoms like persistent fever, swollen lymph nodes, muscle pain, or neurological issues (like headaches or confusion) could suggest a Toxoplasma infection. However, many people with past exposure don’t have symptoms. Your doctor will determine if this test is needed based on your medical history, symptoms, or risk factors.
How long does it take to get results?
Results are usually available within 24 to 72 hours, depending on your lab. Your doctor will contact you once they’re ready to discuss your results.
Can I get this test at home?
No, this test requires a blood sample drawn by a healthcare professional. Some clinics may offer at-home blood collection services, but it’s best to confirm with your provider.
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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