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Explanation: This is the standard English phrase referring to the type of tests (assays) used to detect, for instance, various viruses -- most commonly the hepatitis A, B, and C viruses in human blood serum, and also the HIV viruses.
(I do a LOT of work in this area -- in fact, just now I'm taking a KudoZ break from finishing a set of ELISA [enzyme-linked immunoassay] studies...)
(pop "ELISA" or "MONOLISA" or "RIA +assay" into Google!)
Heathcliff United States Local time: 17:12 Native speaker of: English PRO pts in pair: 504