ELISA (ĭ-līzə, -sə)
A sensitive immunoassay that uses an enzyme linked to an antibody or antigen as a marker for the detection of a specific protein, especially an antigen or antibody. It is often used as a diagnostic test to determine exposure to a particular infectious agent, such as the AIDS virus, by identifying antibodies present in a blood sample.
[e(nzyme)-l(inked) i(mmunoad)s(orbent) a(ssay).]
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