Atlas of livestock parasites
digitized collection of microscopical preparations

Atlas of Parasites Contents Information sources Glossary Administration

immunoglobulin A (IgA)

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A class of immunoglobulin that is the second most common immunoglobulin in blood. It is the main immunoglobulin found in secretions, such as tears, saliva, colostrum, mucous membranes of the intestine, respiratory and reproductive tracts. IgA provides local defense against microorganisms as they try to infect mucous membranes.

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