Toxoplasma gondii IgG Antibody, Serum
This test checks for the presence of antibodies against the parasite Toxoplasma gondii in your blood. Antibodies indicate whether your immune system has encountered this parasite before.
["This test helps determine past exposure to Toxoplasma, which can inform health decisions or next steps in diagnosis."]
Key facts at a glance
- LOINC
- 83123-0
- Short code
- T gondii IgG+IgM SerPl Ql IA
- Synonyms
- T gondii IgG+IgM SerPl Ql IA
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- 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 Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like fatigue, fever, or muscle pain that could be linked to an infection. It may also be used to check for past exposure in individuals at higher risk, such as pregnant women or those with weakened immune systems.
What to Expect Before the Test
No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample, which usually takes a few minutes. If you’re pregnant or have a history of bleeding disorders, let your provider know before the test.
What the Results Mean
A positive result means your body has produced IgG antibodies against Toxoplasma, suggesting you’ve likely been exposed to the parasite at some point. A negative result means no detectable antibodies were found, indicating no prior exposure or recent infection.
Common Reasons for Testing
This test is often used to assess exposure in individuals with symptoms of toxoplasmosis, monitor immune function in those at risk (e.g., transplant recipients or pregnant women), or confirm a diagnosis when other tests are inconclusive.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
IgG antibodies to Toxoplasma are typically long-lasting and indicate past infection. While they don’t confirm an active infection, they can help guide further evaluation if symptoms persist. In high-risk groups (like pregnant women), this test helps assess potential risks to the fetus or identify exposure that may require additional monitoring.
Short name
IgG Antibody to Toxoplasma
Frequently asked questions
What does a positive IgG result mean?
Can this test detect an active Toxoplasma infection?
How long after exposure might I get a positive result?
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