My Mother has UTI since 2 months. In hospital doctors gave her meropenem for 10 days BD after discharge again UTI, after 20 days Now meropenem for 14 days TID this time meropenem was not affective they provide colistin for 10 days 36 hours duration UTI was in control then after a week we did urine test it shows PUS cells full filled now this time truzol 4.5 for 4 days UTI 50% control and now this UTI is recurrent.