Web: | mayocliniclabs.com |
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Email: | mcl@mayo.edu |
Telephone: | 800-533-1710 |
International: | +1 855-379-3115 |
Values are valid only on day of printing. |
Determining whether a patient has had previous exposure to or recent infection with Toxoplasma gondii
IgG is not useful for diagnosing infection in infants younger than 6 months of age. IgG antibodies in this age group usually are the result of passive transfer from the mother.
Detection of IgM-class antibodies to Toxoplasma gondii may be useful as a screen for recent infection with Toxoplasma gondii.
Per the FDA, IgM-positive results by a screening assay should be confirmed, for example by a Toxoplasma reference laboratory.
A single negative result by this assay does not rule-out toxoplasmosis as the specimen may have been collected too early following infection, prior to development of detectable antibodies.
A single IgG-positive result is indicative of exposure to Toxoplasma gondii at some time in the past.
Test ID | Reporting Name | Available Separately | Always Performed |
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TXM | Toxoplasma Ab, IgM, S | Yes | Yes |
TOXGP | Toxoplasma Ab, IgG, S | Yes | Yes |
See Meningitis/Encephalitis Panel Algorithm in Special Instructions.
Multiplex Flow Immunoassay (MFI)