causes of leukocyte esterase in urine
1 Inflammation of the urinary tract and ureters or infection in bladder could also be the cause of leukocytes esterase in urine. 2  One more reason for leukocyte esterase in urine, is sexual intercourse. 3  During sexual intercourse the bacteria may get pressed into the urethra.idneys, bladder, ureters and urethra form the urinary system and when analysis of urine shows leukocytes (without nitrates) in urine it indicates infection in the system. To diagnose leukocytes, urinalysis has to be done in order to know the level of leukocytes esterase in urine.
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. [2] These include:1  Chlamydia. 2  Infection with a sexually transmitted microorganism called ureaplasma urealyticum.ometimes a test for leukocyte esterase produces negative results but later follow-up indicates a disease condition like a urinary tract infection. This could happen from a number of causes a simple as the laboratory technician not allowing enough time before reading the dipstick.