Immunoglobulin A in diabetics.

Serum immunoglobulins G, A and M were investigated by radial immunodiffusion in a group of 217 diabetics (133 males, 84 females) of whom 152 were insulin dependent and 65 non-insulin dependent. Higher values of IgA as compared with IgG and IgM were observed whatever the criteria of clinical analysis used. The highest IgA values were found in diabetics aged over 65 at the onset of disease and in those with renal complications.