Which one of the following statement is FALSE with regard to pyuria in children:: (A) Presence of more than 5 WBC/hpf for girls and more than 3 WBC/hpf for boys, (B) Infection can occur without pyuria, (C) Pyuria maybe present without UTI, (D) Isolated pyuria is neither confirmatory nor diagnostic for urinary tract infection
Answer is A. a. Presence of more than 5WBC/hpf for girls and more than 3WBC/hpf for boys(Ref: Nelson's 20/e p 2557)High Yield Points:Pyuria suggests infection, but infection can occur in the absence of pyuria; Conversely, pyuria can be present without UTI;Sterile pyuria (positive leukocytes, negative cultures) occurs in partially treated bacterial UTI, viral infections, renal tuberculosis, renal abscess, interstitial nephritis, inflammation near ureter or bladderIn an uncentrifuged urine specimen >5WBCs/hpf is abnormal and is called pyuria.