immunoglobulin A deficiency
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immunoglobulin A deficiency[‚im·yə·nō‚gläb·yə·lən ¦ā di′fish·ən·sē]
An immune system disorder in which lower than normal amounts of immunoglobulin A are produced, resulting in increased susceptibility to infections such as chronic sinusitis, chronic pulmonary infections, and digestive problems.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.