UTI infection with fever and cough.

UTI My father is suffering from UTI, took tazofic for fove days as per doctor after that no symptoms of fever. Exactly after one week we observed fever and chills, again doctor prescribed magnex forte for 5 days again one week there is no fever. Again exactly one week consulted urologist, as per doctor using fosirol sachet weekly once. After taking one sachet for first 3 days we didn't observed fever again 4 th day we observed fever around 99. To 100.4 temperature night time. One month back in urine culture was ECOLI 10000 cfu/ml and at present >100000cfu/ml. Urologist sir said to use one month course , fosfomycin weekly once. 6 months back enlarged prostate was there after using alfusin d now it became normal. But some time he his observing burning sensation while voiding urine. Pre void 460/ml and post void is 130/ml. Covid and typhoid and malaria test was negative