My daughter is 5 months old.. And for past few days she had loose motion and after motion and urine test doc. asked for urine and motion test. As she cried during passing urine. test results shown baby has urine tract infection. Elders are saying Uti is because of using diapers. I used diaper only during night in normal days. As she had diarrhoea so we used on day time for 2-3 days. May I know the cause of UTI in my baby.