Abstract
Pediatric urinary tract infection (UTI) is the current problem of pediatrics, urology and nephrology. Its clinical features are varied and age–dependent associated with the inflammation activity, the presence of urinary system abnormalities, and comorbidity. Professional associations and experts initiated creation of one field UTI definitions, diagnostic and therapeutic approaches according to different specialties requirements. This study proposes to revise UTI and pyelonephritis classifications in children, to clarify patients routes from the assumed diagnosis to its confirmation, therapeutic management, multilevel prevention and rehabilitation based on the national protocols modification according evidence–based approach.