Urine infection. Is that required?

Hi, My daughter is 11 months old. She got fever with temperature around 93.5 but no cough, cold, no throat infection, only fever with high temperature and baby was active. As per the advice from doctor, given colpol 1.2 mg 6 hr once for 5 days. If fever is going very highs, given Ibugesic plus 4 mg. Since fever was not reduced on 5th day as well, given her urine sample for test. Attaching her urine routine and culture test results here. Based on result, docotor prescribed antibiotic Cefixime 4 ml daily for 7 days. After giving first dosage of antibiotic, fever was not there. So we cmpleted 7 days of antibiotics. Now doctor recommended to do ultra sound of kidney to find tje rootcause since culture result is positive. Is that required? Now she is again getting fever 12 hrs once 100°c Pls advice