A blockage in the urinary tract can cause leukocytes to appear in the urine. This is often accompanied by blood in the urine. Trauma to the pelvis, a pelvis tumor, bladder or kidney stones, unwanted objects in the urinary tract or prostate hypertrophy can cause a blockage that damages the urinary system.ladder infections or inflammation of the urinary tract and ureters can also cause leukocytes to appear in the urine. Sexual intercourse can cause the transfer of bacteria that can cause an infection to form in the urinary tract.
The definition of a residual is something left over after other things have been used, subtracted or removed. An example of residual is the paint which left over after all the rooms in a house have been painted.
Residual chlorine is the amount of chlorine that remains in the water after a certain period or contact time. Testing for residual chlorine is one of the most common tests used by water treatment plants. The residual chlorine test determines the amount of remaining chlorine in water that has finished testing and is ready to be released to the distribution system.