Test Overview

Test Methodology

Chemiluminescent Immunoassay

Test Usage

Support the diagnosis of Toxoplasma infection. The presence of IgG antibody generally indicates past exposure and immunity. The presence of IgM antibody indicates recent infection. Single IgG levels are not useful for supporting the diagnosis of an acute infection. Elevated levels in neonates should be followed up with studies to rule out the presence of maternal antibodies by demonstrating the absence of an IgM response.

Reference Range*

NEGATIVE: No detectable IgG antibody to Toxoplasma. EQUIVOCAL: Presence or absense of IgG antibody to Toxoplasma cannot be determined. Another specimen should be sent for analysis. POSITIVE: Detectable levels of IgG antibody Toxoplasma. Detectable levels of Toxoplasma antibody indicate exposure to Toxoplasma gondii.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

The performance characteristics of this test have not been established for CSF, neonates, infants or cord blood. This is a qualitative test; quantitation for comparison of acute and convalescent sera has not been validated by the manufacturer of the current test system. Result values from different methodologies or from different institutions cannot be compared.

Test Details

Days Test Performed

Monday - Friday

Analytic Time

8 hours

Soft Order Code


MiChart Code

Toxoplasma gondii Antibody, IgG



Toxoplasma IgG, Qualitative
Toxoplasma gondii IgG
Viral Antibody: Toxoplasma IgG
Torch Screen

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Chemical Pathology

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Specimen Requirements

Offsite Collection Instructions

Collect specimen in an SST (preferred) or red top tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.


Yellow Top Tube

Normal Volume

1 mL serum

Minimum Volume

0.3 mL serum

Additional Information

The magnitude of the measured result is not indicative of the amount of antibody present.

Billing Information

Fee Codes

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