Leukocyte esterase is a urine test to look for white blood cells and other signs associated with infection.
How the test is performed
After you provide a urine sample, it is tested right away. The health care provider uses a dipstick made with a color-sensitive pad. The color of the dipstick changes to tell the provider if you may have white blood cells in your urine.
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. 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. This may mean you have a
If this test is positive, the urine should be examined under a microscope for white blood cells and other signs that point to an infection.
A negative test result is normal.
Normal values vary from lab to lab. Talk to your doctor about the meaning of your specific test result.
The following may create a false positive result:
- Trichomonas infection (such as
- Vaginal secretions (such as blood or heavy mucus discharge)
False negative tests can be caused by:
- High level of protein
- High level of vitamin C
What abnormal results mean
An abnormal result indicates a possible urinary tract infection.