what is urine wbc esterase
Leukocyte esterase (LE) is a urine test for the presence of white blood cells and other abnormalities associated with infection.he combination of the LE test with the urinary nitrite test provides an excellent screen for establishing the presence of a urinary tract infection (UTI). A urine sample that tests positive for both nitrite and leukocyte esterase should be cultured for pathogenic bacteria.