Hi: Thank you for your question. The diagnosis of a kidney infection does not rest solely on the number of leukocytes. The distinction is important because a different antibiotic would be used. Generally, we look for a fever, flank (upper, not lower back pain). to distinguish between kidney and bladder infections. Leukocytes are generally higher in a kidney infection, but not necessarily. In more severe cases, the patient would be vomiting and would need IV fluids and antibiotics. Sometimes when a patient has leukocytes and no symptoms, doctors will not treat as the body s own defense system will take over or because the urine dip may have been inaccurate. You did not list any symptoms. I will have to assume you are on an antibiotic and that it is working. Hope this helps. Carol Rogala D.O.