Hi,my baby boy is 6months old...since from birth he had uti.initially it was klebsella growth ,but it was cured with ofloxacin,latter on in the very next week there is a growth of ecolli,doc suggested walamycin(first week)and Nova Max(sec week cont..)but medicines doesent work ,now with ecoli, culture shows rbcs-2-3 and pus cells 5-10.what should I do..pls tell me sir