Hello Thanks for query . Your brother has been detected to have stone in the mid ureter and D.J stent has been placed in his renal unit to felicitate stone to pass down easily without any pain . The fever with chills that he has is mostly due to inflammation of ureter (Ureteritis) or primarily due to nfection . He needs to get his urine culture done to trace out the organisms causing this infection and to know the antibiotic sensitivity . Please give him broad spectrum antibiotics like Cefixime along with urinary antiseptic like Nitrofurantoin twice daily and urine alkalizer thrice daily .Later on switch on to appropriate antibiotics as per culture report. Get the prescription of medicines from your family Physician. Ensure he drinks more water .To keep your urine dilute This will help to control dysuria. Do not worry his will get resolved once the stent is remved . Dr.Patil.