Leukocyte esterase is a urine test to look for white blood cells and other signs associated with infection.
Alternative NamesWBC esterase
How the test is performedA clean catch urine sample is needed. See: Urine specimen - clean catch
How to prepare for the testNo special preparation is necessary for this test.
How the test will feelThe test will involve only normal urination, and there is no discomfort.
Why the test is performedLeukocyte esterase is a screening test used to detect a substance that suggests there are white blood cells in the urine, which may mean you have a urinary tract infection.
This test is part of the routine urine dipstick test. If this test is positive, the urine should be examined under a microscope for white blood cells and other abnormalities associated with infection.
Normal ValuesA negative test result is normal.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results meanAn abnormal result indicates a possible urinary tract infection.
What the risks areThere are no risks.
Special considerationsThe following may create a false positive result:
False negative tests can be caused by:
Leukocyte esterase is a urine test to look for white blood cells and other signs associated with infection.
Alternative NamesWBC esterase
How the test is performedA clean catch urine sample is needed. See: Urine specimen - clean catch
How to prepare for the testNo special preparation is necessary for this test.
How the test will feelThe test will involve only normal urination, and there is no discomfort.
Why the test is performedLeukocyte esterase is a screening test used to detect a substance that suggests there are white blood cells in the urine, which may mean you have a urinary tract infection.
This test is part of the routine urine dipstick test. If this test is positive, the urine should be examined under a microscope for white blood cells and other abnormalities associated with infection.
Normal ValuesA negative test result is normal.
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your doctor about the meaning of your specific test results.
What abnormal results meanAn abnormal result indicates a possible urinary tract infection.
Special considerationsThe following may create a false positive result:
False negative tests can be caused by:
Landry DW, Bazari H. Approach to the patient with renal disease. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 116.
Ban KM, Easter JS. Selected urologic problems. In: Marx JA, Hockberger RS, Walls RM, et al, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 97.
Litza JA, Brill JR. Urinary tract infections. Prim Care. 2010 Sep;37(3):491-507, viii.
Reviewed ByReview Date: 08/21/2011
Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
A routine urinalysis usually includes the following tests: color, transparency, specific gravity, pH, protein, glucose, ketones, blood, bilirubin, nitrite, urobilinogen, and leukocyte esterase.
Urine is 95% water, and also contains Urea, Creatinine, Uric acid, as well as salt and ammonia and other trace elements and hormones.
esterase, unlike lipases, are inactive against water-insoluble esters as vinyl laurate and trioctanoylglycerol. From the the comparison of structural features of sequence-related esterases and lipases, it appears that lipases, unlike esterases, display a significant difference in the distribution of hydrophobic amino acid residues at vicinity of their active site
An ester is a compound formed by condensation (dehydration) of an oxy-acid and an alcohol. Example: Glycerol + nitic acid --> glycerol trinitrate + water (glycerol trinitrate = 1,2,3-trinitroxypropane = nitroglycerine) Organic esters are more common. Formed from an organic oxy-acids (eg. carboxylic, nitro- and sulfonic acids) and an alcohol. Many fats in the body are triglycerides, long chain fatty acid tri-esters of glycerol.
Leukocyte esterase is a urine test that searches white blood cells for abnormalities due in infections.
A cause of leukocyte esterase in urine is an urinary tract infection. Leukocyte esterase is a test used to detect a specific substance that indicates that there may be white blood cells in urine.
through the urine
My leukocyte Esterace ua came indicating I have a moderate amount in my urine. Will my doctor prescribe an antibiotic?
Leukocyte esterase is a test used to help determine whether a person has a urinary tract infection.
Leukoesterase = Leukocyte + Esterase. Leukoesterase is a combination word derived from the words Leukocyte and Esterase (LE), which is a urine test for the presence of white blood cells in the urine. "Leukocyte" meaning white blood cell and "Esterase" meaning white blood cell enzyme. Leukoesterase is released by white blood cells. A positive screen for leukoesterase usually indicates a urinary tract infection, in combination with a positive nitrite test - (see "Nitrite Test"). The LE test is also used to screen for gnorrhea and amniotic fluid. In a normal urinalysis Leukesterase is not present or "negative" when listed in lab results. *Please see Leukocyte Esterase Wiki for further discussion and more detailed explantion.
Leukocyte esterase is a urine test that is used to determine the amount of white blood cells. It also can check the existing white blood cells for abnormalities that would be caused by an infection.
Leuko Est is an abbreviation used for leukocyte esterase urine test. This test is used to determine if an individual has specific types of infections.
A routine urinalysis usually includes the following tests: color, transparency, specific gravity, pH, protein, glucose, ketones, blood, bilirubin, nitrite, urobilinogen, and leukocyte esterase.
You may have an infection.A positive finding of the enzyme leukocyte esterase in urinalysis indicates the presence of white blood cells in the urine. This normally suggests inflammation of some sort, often from a urinary tract infection. A simple dipstick test as part of a urinalysis can detect the presence of this enzyme.Leukocyte esterase in urinalysis functions as a screening test. A negative result makes it unlikely an infection exists, thus making further testing of the urinary with a microscopic examination and urine culture for bacteria usually unnecessary.Although a urinary tract infection is the most common cause of leukocyte esterase in urinalysis some other and rarer causes for the positive result with a negative microorganism culture do exist. These include:ChlamydiaInfection with a sexually transmitted microorganism called ureaplasma urealyticumBalanitis, a skin disease occurring at the head of the penisCancer of the bladderKidney stonesTuberculosisA foreign body in the urinary tractGlomerulonephritis, an inflammation of small blood vessels in the kidneysPrescription drugs such as corticosteroids
choline esterase enzyme and there is 2 types of choline esterase 1 .truecholine esterase 2. pseudo choline esterase
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