Test Details
Mnemonic
TTAG
Ordering Code
3017280
CPT-4 Code(s)
86364 x 2
Specimen Information
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from cells and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Serum: Red top
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Rejection Criteria
Grossly hemolyzed or lipemic specimens, plasma
Stability
Room temperature: 8 hours
Refrigerated: 48 hours
Frozen: 14 days
Refrigerated: 48 hours
Frozen: 14 days
Methodology
Enzyme Linked Immunoassay
Reference Range
TTG IgA:
Negative: <20 Units
Weak Positive: 20 - 30 Units
Moderate to Strong Positive: >30 Units
TTG IgG:
Negative: <20 Units
Weak Positive: 20 - 30 Units
Moderate to Strong Positive: >30 Units
Negative: <20 Units
Weak Positive: 20 - 30 Units
Moderate to Strong Positive: >30 Units
TTG IgG:
Negative: <20 Units
Weak Positive: 20 - 30 Units
Moderate to Strong Positive: >30 Units
Performing Laboratory
Warde Medical Laboratory