leukocyte esterase test

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leu·ko·cyte es·ter·ase test

(LET) (lū'kō-sīt es'tĕr-ās test)
A chemical assay to determine the presence of lysed or intact white blood cells in urine, performed with a dipstick as part of routine urinalysis; serves as an adjunct to microscopic examination of urinary sediment, and used to screen asymptomatic people for urinary tract infection, especially chlamydial urethritis.
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