Toxoplasma IgG/IgM (TOX)

Department: Immunology
Test Synonym(s): LAB501, TOX
Test Components: Toxoplasma IgG; Toxoplasma IgM
CPT Codes: 86777, 86778
Methodology: ELISA
Reference Range: IgG: Negative, IgM: Negative
Tube Type: Gold top SST (Clot activator with gel) or red top (no gel)
Specimen: Serum
Alternate Specimen: None
Pediatric Requirements: Red top microtainer (1 mL) x2
Volume: 1 tube
Minimum Volume: Red top microtainer (1 mL) x2
Temperature: Allow to clot, store refrigerated (2-8 degrees C)
Stability: Labile specimen. Keep refrigerated.
Reasons for Rejection: Extreme lipemia and/or hemolysis
Days Performed: Monday - Friday
Times Performed: Morning
TAT: 24 - 72 hours
Significance: Elevated IgG and negative IgM suggest remote infection. Elevated IgG and positive IgM suggest recent infection. False positive Toxoplasma IgM may be seen. To confirm positive IgM results, specimen will be sent to Palo Alto Reference Lab.

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