Leukocyte esteraseDefinition: Leukocyte esterase is a urine test to look for white blood cells and other signs associated with infection.
Alternative Names: WBC esterase
How to prepare for the test: No special preparation is necessary for this test.
How the test will feel: The test will involve only normal urination, and there is no discomfort.
Why the test is performed: Leukocyte esterase is a screening test used to detect a substance that suggests there are white blood cells in the urine, which likely means 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 Values: A 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 mean: An abnormal result indicates a possible urinary tract infection.
What the risks are: There are no risks.
Special considerations: The following may create a false positive result: - Vaginal secretions (such as blood or heavy mucus discharge)
- Trichomonas infection (such as trichomoniasis )
False negative tests can be caused by: - High levels of protein
- High levels of vitamin C
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