Toxoplasma gondii Antibodies, IgG and IgM
Ordering Recommendation
Quantitative Chemiluminescent Immunoassay/Semi-Quantitative Chemiluminescent Immunoassay
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
Serum separator tube. Also acceptable: Serum from umbilical cord blood.  
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."  
Storage/Transport Temperature
Unacceptable Conditions
Plasma or urine. Contaminated, heat-inactivated or grossly hemolyzed specimens.  
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
Test Number Components Reference Interval
0050770Toxoplasma gondii Antibody, IgG Effective March 3, 2014
7.1 IU/mL or less: Not Detected.
7.2-​8.7 IU/mL: Indeterminate -​ Repeat testing in 10-​14 days may be helpful.
8.8 IU/mL or greater: Detected.
0050557Toxoplasma gondii Antibody, IgM  
7.9 AU/mL or less: Not Detected.
8.0-​9.9 AU/mL: Indeterminate -​ Repeat testing in 10-​14 days may be helpful.
10.0 AU/mL or greater: Detected -​ Significant level of Toxoplasma gondii IgM antibody detected and may indicate a current or recent infection. However, low levels of IgM antibodies may occasionally persist for more than 12 months post-​infection.
Interpretive Data
Refer to report.  
CPT Code(s)
86317; 86778
Component Test Code*Component Chart NameLOINC
0050557Toxoplasma gondii Ab, IgM5390-0
0050770Toxoplasma gondii Ab, IgG8039-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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