Hi, It would be more easy for me if I get a few more details: Any symptoms other than fever, like frequent or painful urination, abdominal pain, vomiting, sever headache? From the given details, your kid is having high fever for past 3 days. If I was your treating doctor, after a thorough physical examination to rule out other conditions like pharyngitis, I will treat this as case of urinary infection (even though reports are only marginally abnormal). In such cases, I used to send urine culture before starting antibiotics, reports of which will be available by 3rd days. Fever not coming down after 3 days means, he is not responding to the given antibiotics. We need to change the antibiotic depending on culture, or empirically to another group if culture was not done. Kindly get back to your doctor without delay. Meanwhile, give him paracetamol every 6-8 hours and frequent oral fluids. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Muhammed Aslam TK, Pediatrician