91209      Treponema pallidum Antibody by TP-PA (MHA-TP)
Specimen:
  Collect: One 7.5 mL SST  
  Submit: 1 mL (Min:0.5 mL) Serum. Submit Refrigerated. Submit in a Standard Transport Tube.  
  Special Handling: Avoid Repeated Freeze/Thaw Cycles
Separate from cells ASAP 
  Stability: Ambient: 2 Day(s); Refrigerated: 2 Week(s); Frozen: 12 Month(s); Incubated: Unacceptable 
Methodology: Hemagglutination; Indirect Hemagglutination 
Performed: Mon-Fri 
Reported: 2-5 Day(s) 
CPT Codes:
86781
Interpretive Data:
General Reference Range : non-reactive

TP-PA is a helpful diagnostic aid for the patient with a reactive reagin test, but presents with atypical signs of primary, secondary or late syphilis. TP-PA compares favorably with the FTA-ABS test, but appears slightly less sensitive in cases of untreated early primary syphilis.