Toxoplasma gondii IgG Antibody (Serum) – Immunoassay
This test checks for antibodies to the parasite *Toxoplasma gondii*, which can indicate past exposure to the parasite. It helps determine if you’ve been infected with toxoplasmosis, a condition caused by the parasite.
["Past exposure to toxoplasmosis may be detected through this blood test."]
Key facts at a glance
- LOINC
- 57770-0
- Short code
- T gondii IgG+IgM pnl Ser
- Synonyms
- T gondii IgG+IgM pnl Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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
Your healthcare provider may order this test if you have symptoms like fever, fatigue, or muscle aches that could suggest toxoplasmosis. They might also recommend it if you have a weakened immune system (e.g., from HIV/AIDS, chemotherapy, or organ transplant) or if you’re pregnant to assess risks to your baby.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The process usually takes a few minutes. If you’re pregnant, let your provider know before the test.
What the Results Mean
A positive result means you likely had past exposure to *Toxoplasma gondii*. A negative result suggests you’ve never been exposed or have very low levels of antibodies. Results don’t indicate whether you’re currently infected or healthy.
Possible Side Effects
You may experience mild bruising, soreness, or swelling at the injection site. Rarely, you might feel lightheaded or dizzy. If you experience severe pain or bleeding, contact your provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
IgG Antibody to Toxoplasma
Frequently asked questions
This test is critical for individuals with weakened immune systems to prevent severe infections. In pregnancy, it helps identify risks to the fetus, though treatment may not always be necessary if exposure was years ago.
This test uses a blood sample collected from your arm. The sample is analyzed in a lab to detect antibodies produced by your immune system in response to *Toxoplasma gondii*.
How long will I need to wait for results? Results are typically available within 1–3 business days, depending on lab processing times.
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