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Vanderbilt Pathology Laboratory Services

Test Directory



TOXOPLASMA IgG AND IgM BLOOD (TOX)

Department: Immunology
Test Synonym(s): TOX
CPT Codes: 86777, 86778
Reference Range: IgG: < 1:16, IgM: negative
Tube Type: Red top (clot activator with gel) or red top (no gel)
Specimen: Blood
Alternate Specimen: None
Pediatric Requirements: 2 bullets
Volume: 5 mL
Temperature: Refrigerate, separate and freeze serum
Stability: Refrigerated serum: 48 hours
Reasons for Rejection: Drawn in any anticoagulant
Days Performed: Tuesday and Friday
Times Performed: Morning
TAT: 1 week
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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