My father is 72 years old, he is suffering from prostate problem, we are planning for surgery turp or help, doctor advised for urine culture in that we have infection so doctor gave us amikacin 750 mg injection and forisol powder for 1 week, after medication we repeated the test then again infection came, but all antibiotics are shown resistant, what should I do now, but my father does not have any symptom of urine pain or fever, pls suggest me.