Abstract
Summary
The ontogeny of IgA in chickens was similar to that of mammalian species in that adult levels were attained relatively late compared with the other major immunoglobulin classes, namely IgM and IgY. Surgical bursectomy at hatch resulted in a delayed appearance of serum IgA in subnormal levels for the first ∼ 40 days of life. By Day 56 the serum IgA levels of normal and Bx birds were similar.
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