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Toxoplasma gondii IgG Antibody (Serum/Plasma)

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

This test checks for antibodies in your blood that your immune system produces after being exposed to the parasite Toxoplasma gondii, which can cause infections like toxoplasmosis.

Quick summary

["IgG antibodies indicate past or long-term exposure to Toxoplasma."]

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

Key facts at a glance

LOINC
88746-3
Short code
T gondii IgG+IgM pnl SerPl IA
Synonyms
T gondii IgG+IgM pnl SerPl 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

What Does This Test Measure?

The test detects IgG antibodies specific to Toxoplasma gondii, a parasite that can affect various organs, including the brain and eyes. These antibodies signal that your body has encountered the parasite at some point, often years ago, and your immune system has responded by producing them.

Why Might You Need This Test?

Doctors may order this test if you have symptoms like fever, muscle aches, or swollen lymph nodes that could suggest an infection. It’s also used in people with weakened immune systems (e.g., due to HIV/AIDS, chemotherapy, or organ transplants) to check for past exposure before certain procedures.

What Does a Positive Result Mean?

A positive result means your body has likely been exposed to Toxoplasma gondii in the past. This doesn’t always mean you’re currently infected, but it does indicate immunity from prior exposure.

What Does a Negative Result Mean?

A negative result suggests you haven’t been exposed to Toxoplasma gondii recently or at all. However, if you’re at high risk (e.g., pregnant, immunocompromised), further testing (like IgM) may be needed to check for recent infection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: When This Test Matters

Short name

IgG Antibody to Toxoplasma

Frequently asked questions

Why is this test important for my health?
This test helps assess your immune response to Toxoplasma, which can be critical for people with weakened immune systems to prevent severe infections. It’s also used in pregnancy to check for past exposure before planning certain medical interventions.
What if my test results are positive but I don’t have symptoms?
A positive IgG result means your body has developed immunity to Toxoplasma, but it doesn’t necessarily mean you’re currently infected. You may not need further action unless your doctor has specific concerns about your health or upcoming treatments.
Can I get this test at home or through mail-order?
This test is typically performed in a clinical lab through a blood draw by a healthcare provider. Results are usually reported by your doctor, who will interpret them in the context of your medical history and symptoms.
  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