my mom has e coli and urine infection, which never gets cured since she had a stone in her urethra. she was operated in august 2013. Again in january 2014 she was having high and low fever for a long one month. when diagnosed it was found that she has B.coli.,and doctor has given martifur 2 times daily for a week. .. is it safe for her as she is diabetic and only one kidney is working with creatinine 3.0. she is also a heart patient. he is also a metastatic breast cancer patient (bone metastasis) with renal disease.. Her age is 59. and from India. She is also tired and always has fever between 98.8 to 100 degree c. plz help