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Test Code TOXGP Toxoplasma gondii Antibody, IgG, Serum

Reporting Name

Toxoplasma Ab, IgG, S

Useful For

Determining whether a patient has had previous exposure to or recent infection with Toxoplasma gondii


This test is not useful for diagnosing infection in infants younger than 6 months of age. In that age group, IgG antibodies usually are the result of passive transfer from the mother.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Ordering Guidance

IgG antibodies in patients younger than 6 months of age are typically the result of passive transfer from the mother. To assess possible Toxoplasma gondii infection in patients less than 6 months old, order TXM / Toxoplasma gondii Antibody, IgM, Serum.

Specimen Required


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 0.5 mL

Specimen Minimum Volume

0.4 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 14 days
  Frozen  14 days

Reference Values

Toxoplasma ANTIBODY, IgG



Toxoplasma IgG

≤9 IU/mL (Negative)

10-11 IU/mL (Equivocal)

≥12 IU/mL (Positive)

Reference values apply to all ages.

Day(s) Performed

Monday through Saturday

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
TOXGP Toxoplasma Ab, IgG, S 88746-3


Result ID Test Result Name Result LOINC Value
TOXG Toxoplasma Ab, IgG, S 40677-7
DEXG6 Toxoplasma IgG Value 8039-0

Report Available

Same day/1 to 3 days

Method Name

Multiplex Flow Immunoassay (MFI)


If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.