Normal urinalysis leukocyte esterase level is:

Normal urinalysis leukocyte esterase level is:

• A. Negative
• B. Trace
• C. Not detected
• D. Positive

Answer: (A)

Leukocyte esterase is a marker for white blood cells in the urine, used to screen for pyuria and possible urinary tract infection. In a normal urinalysis, there are no significant leukocytes in the urine, so leukocyte esterase is not present, yielding a negative result. This absence means there’s no leukocyte-driven inflammation detected by the test. If leukocyte esterase is detected—even at trace levels—it suggests pyuria and potential infection or inflammation, which is not considered normal. Therefore, the normal result is negative.

Leukocyte esterase is a marker for white blood cells in the urine, used to screen for pyuria and possible urinary tract infection. In a normal urinalysis, there are no significant leukocytes in the urine, so leukocyte esterase is not present, yielding a negative result. This absence means there’s no leukocyte-driven inflammation detected by the test. If leukocyte esterase is detected—even at trace levels—it suggests pyuria and potential infection or inflammation, which is not considered normal. Therefore, the normal result is negative.