2 - 3 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
0.5 mL (Note: This volume does not allow for repeat testing.)
Red-top tube or gel-barrier tube
Specimen should be free of bacterial contamination, hemolysis, and lipemia.
Hemolysis; lipemia; gross bacterial contamination
Detection of antibodies to aid in the diagnosis of gluten-sensitive enteropathy (GSE), such as celiac disease and dermatitis herpetiformis
A negative tTG IgA result in an untreated patient does not rule out gluten-sensitive enteropathy. This result can often be explained by selective IgA deficiency, a relatively frequent finding in celiac disease. Results of this assay should be used in conjunction with clinical findings and other serological tests.
Enzyme immunoassay (EIA)
• Negative: 0−3 units/mL
• Weak positive: 4−10 units/mL
• Positive: >10 units/mL
Studies have demonstrated that IgA endomysial antibody tests have >99% specificity for gluten-sensitive enteropathy.1 Recently, the endomysial antigen has been identified as the protein cross-linking enzyme known as tissue transglutaminase (tTG).2
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|164640||t-Transglutaminase (tTG) IgA||31017-7||164643||t-Transglutaminase (tTG) IgA||U/mL||31017-7|
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