Thoughts please

3 month old baby girl has repeated urine culture showing up UTI.

On 15 Oct - KLEBSIELLA SPP On 23 Oct - Escherichia coli and 30 Oct - Escherichia coli

She is on Clavam 1 ml twice a day why isn’t the bacteria going? On medication since 16 Oct.

Hygiene and diaper cleaning is maintained. She has lot of gas and so farts a lot. Next steps Dr suggested ultrasound of abdomen on Monday and asked to stop Clavam