IgA

American  

Immunology.

1. immunoglobulin A: a class of antibodies predominant in respiratory and alimentary tract secretions and in saliva and tears, functioning as the body's first line of defense against invading foreign substances especially by neutralizing viral antigens and by preventing the adherence of bacteria to mucous membrane surfaces.

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Etymology

Origin of IgA

First recorded in 1960–65

Example Sentences

They also suggest a possible link to IgA nephropathy, an autoimmune kidney disease.

From Science Daily

IgA antibodies are part of the so-called adaptive immune system and reside naturally in the mucosal membranes of the airways.

From Science Daily

Gommerman is intrigued by the potential for IgA antibodies in the nose and saliva as well.

From Science Magazine

By contrast, nasal vaccines produce a special set of antibodies, called IgA, that thrive on mucosal surfaces like the nose and throat.

From Seattle Times

Eoin was first diagnosed with IgA nephropathy when he was in his late teens.

From BBC