Which one of the following statements is false with regard to pyuria in children –
Presence of more than 5 WBC/hpf (high power field) for girls and more than 3 WBC/hpf for boys
Infection can occur without pyuria
Pyuria may be present without Urinary tract infection
Isolated pyuria is neither confirmatory nor diagnostic for Urinary tract infection
Pyuria is the presence of more than 5 WBCs / high power field, both for boys and girls.            —CPDT
Pyuria suggests infection, but infection can, occur in the absence of pyuria.                               —Nelson
Pyuria can present without UTI.                                                                                                              — Nelson
So, Isolated pyuria is neither confirmatory nor diagnostic for UTI.