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Leukocyte esterase (LE) is an esterase (a type of enzyme) produced by leukocytes (white blood cells). A leukocyte esterase test (LE test) is a urine test for the presence of white blood cells and other abnormalities associated with infection. White blood cells in the urine can indicate a urinary tract infection (UTI). Positive test results may ...
The leukocyte esterase test indirectly detects the presence of leukocytes (white blood cells) in urine which can be associated with a urinary tract infection. In the elderly, the leukocyte esterase test is often positive even in the absence of an infection.
The test for leukocyte esterase is indicative and does not replace microscopic examination of urine. [19] It is normal to find up to 3 (occasionally 5) leukocytes per high power field (40X) in a urine sample, with women having slightly higher results owing to vaginal contamination. [citation needed] Higher numbers indicate urinary infection.
Leukocytes: n/a: 0 / negative [2] See also. Reference range; Reference ranges for blood tests; References This page was last edited on 26 January 2024, at 11:14 ...
Leukocyte esterase, an enzyme found in granulocytes, is measured to estimate the concentration of white blood cells. [53] The action of the enzyme on chemicals in the test pad ends in the creation of a purple azo dye . [ 54 ]
In complicated or questionable cases, it may be useful to confirm the diagnosis via urinalysis, looking for the presence of urinary nitrites, white blood cells (leukocytes), or leukocyte esterase. [54] Another test, urine microscopy, looks for the presence of red blood cells, white blood cells, or bacteria.
Hydronephrosis is the result of any of several abnormal pathophysiological occurrences. ... (such as a positive leukocyte esterase or nitrite). ... This means an ...
A white blood cell differential is a medical laboratory test that provides information about the types and amounts of white blood cells in a person's blood. The test, which is usually ordered as part of a complete blood count (CBC), measures the amounts of the five normal white blood cell types – neutrophils, lymphocytes, monocytes, eosinophils and basophils – as well as abnormal cell ...