Introduction:

Celiac disease is an immune-mediated enteropathy that has been increasingly recognized as a common disease, affecting both the pediatric and adult population. Serology is a key component of the detection and diagnosis of celiac disease.

Objective:

To evaluate the diagnostic usefulness of anti-tissue transglutaminase antibodies in individuals with chronic gastrointestinal symptoms.

Methods:

In a cutoff study, anti-tissue transglutaminase IgA/G antibodies were determined in 87 adult and pediatric patients with medical indication for celiac disease antibodies. Anti-tissue transglutaminase IgA/G was performed by enzyme-linked immunoadsorbent assay and multiplex immunoblot assay. Mann-Whitney U test was applied and kappa correspondence coefficient was calculated.

Results:

The seroprevalence of anti-tissue transglutaminase IgG/IgA was 8.05 % (7/87) by enzyme-linked immunosorbent assay. The qualitative results of the enzyme-linked immunosorbent assay and immunoblot for anti-tissue transglutaminase were consistent with a kappa coefficient of 0.407 (p=0.004). The distribution of the concentration of anti-TGt IgA/G antibodies obtained by enzyme-linked immunosorbent assay with respect to negative and positive immunoblot results was not significant (p=0.08). Patients with presence of anti-tissue transglutaminase IgA/G by enzyme-linked immunosorbent assay obtained the definitive diagnosis of celiac disease confirmed by duodenal biopsy.

Conclusions:

The usefulness of detection of anti-tissue transglutaminase IgA/G antibodies by enzyme-linked immunosorbent assay as a first diagnostic step of celiac disease in patients with gastrointestinal symptoms was confirmed.

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