<prompt> Which one of the following statements is false with regard to pyuria in children?Presence of more than 5 WBChpf high power field for girls and more than 3 WBChpf for boysInfection can occur without pyuriaPyuria may be present without Urinary tract infectionIsolated pyuria is neither confirmatory nor diagnostic for Urinary tract infection  <response>: Gram stain of the uncentrifuged urine revealing 2 or more bacteria per oil immersion field suggests significant bateriuria. Dipstick examination combining detection of leukocyte esterase and nitrate is as sensitive as microscopic urinalysis in screening for UTI. The defenitive diagnosis of UTI depends on the urine culture showing 100000 organismml. Ref: Kliegman, Behrman, Jenson, Stanton 2008, Chapter 538 Urinary Tract Infections, In the book, NELSON TEXTBOOK OF PEDIATRICS, Volume 2, 18th Edition, New Delhi, Pages 2225-6. 