NEPHROLOGY… Screening tests for diagnosing urinary tract infection (UTI) 30 Jul 202029 Jul 2020 Screening tests include urine microscopy, gram stain, leukocyte esterase and nitrite tests. Urine microscopy: Pyuria is defined as >10 WBCs/mm3 in uncentrifuged and >5 WBCs/hpf in centrifuged urine specimen. Pyuria may be…