Hi My son is 10 months old his culture shows Klebsiella species >1,00,000/ml of urine. Same report in the previous test that was taken 15 days ago when he got one day fever (he used to get fever very frequently and the culture used to be always negative, this was the first positive one). but he has no fever and completely active, not on any medication. Is this UTI? (his urine flow is completely normal, no irritation). Is antibiotic required, since no fever would it go off on its own? what are the effects of leaving this untreated? pls advice.