Children having normal serum levels of IgG and IgM but IgA below 5mg/dl were considered as having “selective IgA deficiency”. Those with-2 SD from the normal mean for the age were defined as ...

Ventura A Selective IgA deficiency was observed in 12 of 688 (1.7%) patients with celiac disease who were clinically undistinguishable from patients with celiac disease with normal IgA levels.

Deficiency of immunoglobulin A (IgA ... This can help determine whether a normal test for celiac disease could actually be a false negative result as a consequence of IgA deficiency.