Specimen Collection Manual and Test Catalog

1 mL serum

Allow to clot. Centrifuge and submit 1.0 mL serum.

Refrigerated

Room temperature: 7 hours. Refrigerated: 48 hours. Frozen: 30 days

Grossly hemolyzed or lipemic samples

IgA: 
< 1 year: 0-83 mg/dL
1 - < 4 years: 20-100 mg/dL
4 - < 7 years: 27-195 mg/dL
7 - <10 years: 34-305 mg/dL
10 - <19 years: 58-348 mg/dL
19 years and up: 70-400 mg/dL

IgG: 
< 1 year: 232-1411 mg/dL
1 - < 4 years: 453-1411 mg/dL
4 - < 10 years: 504-1465 mg/dL
10 - <14 years: 698-1560 mg/dL
14 years and up: 700-1600 mg/dL

IgM:
< 1 year: 0-145 mg/dL
1 - < 4 years: 19-146 mg/dL
4 - < 7 years: 24-210 mg/dL
7 - <12 years: 31-208 mg/dL
12 - <19 years: 35-239 mg/dL
19 years and up: 40-230 mg/dL

TTg IgA, TTg IgG, Gliadin IgA, Gliadin IgG:
Negative <7 U/mL
Equivocal 7-10 U/mL
Positive >10 U/m
 

Celiac Disease Serology Cascade

Tissue Transglutaminase Antibody TTG IgA, Total Immunoglobulin IgA, reflexing to Tissue Transglutaminase Antibody TTG IgG, Gliadin IgA, Gliadin IgG, Total Immunoglobulin IgG, Total Immunoglobulin IgM

Celiac panel, Reflex celiac, Celiac reflex

This reflex panel is designed for patients with suspected celiac disease. Patient must be on a normal gluten diet when this test is ordered, otherwise the accuracy of the serology test will be affected.