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Toxoplasma IgG Antibody (Serum/Plasma)

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

This test checks for antibodies to the parasite *Toxoplasma gondii*, which can indicate past or current infection.

Quick summary

["Past exposure to toxoplasmosis may be detected with this blood test."]

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

Key facts at a glance

LOINC
74262-7
Short code
HEDIS 2014-18 Toxoplasma Ab
Synonyms
HEDIS 2014-18 Toxoplasma Ab
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 This Test Measures

The test detects IgG antibodies produced by your immune system in response to *Toxoplasma gondii*, a parasite commonly found in undercooked meat or contaminated soil/water. These antibodies suggest you’ve been exposed to the parasite at some point, even if you’re currently symptom-free.

Why It’s Ordered

Your healthcare provider may order this test if you have symptoms like fever, fatigue, or muscle pain, or if you’re at higher risk (e.g., pregnant, immunocompromised, or undergoing organ transplant). It’s also used to monitor chronic infections or assess exposure in certain settings.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample (usually from a vein in your arm) during a routine office visit or lab visit. The test is quick and typically painless.

What the Results Mean

Positive results indicate past exposure to *Toxoplasma gondii*. Negative results mean no detectable antibodies, suggesting you’ve likely never been exposed. Results alone don’t confirm active infection; additional testing may be needed for diagnosis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Toxoplasma Antibody Test

Frequently asked questions

What does a positive result mean?
A positive result means your body has likely encountered *Toxoplasma gondii* at some point, but it doesn’t confirm if you’re currently infected. It may indicate immunity or past exposure that your immune system has cleared.
Can this test detect active infection?
No, this test only detects IgG antibodies, which appear after the infection has resolved. For active infection, additional tests (like PCR or IgM antibody tests) may be needed.
Is there any risk from this blood test?
The risk of complications from a blood draw is very low. Minor bruising or soreness at the site is common, but serious reactions are rare.
  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