Treponemal IgG (TAG)
Department: Immunology
Test Synonym(s): LAB1197, TAG, Trep-Sure, Anti-Treponemal Antigen
Test Components: Treponemal Antibody IgG
CPT Codes: 86780
Methodology: Chemiluminescence
Reference Range: 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 gross hemolysis
Days Performed: Monday - Friday
Times Performed: Morning
TAT: 24 - 72 hours
Significance: If positive, quantitative RPR (titer) will be performed per CDC reverse screening algorithm. If discrepant results between the two methods, will be sent to ARUP for TP-PA confirmatory assay - LAB3848.
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