i am facing uti since 5 months. i realized it when urine started coming bloody. we went to doctor. after taking blood, urine, sonography, x ray tests we understood that it was caused by e coli. i completed course of 28 merotec 1gm injections in 14 days. then again we took blood, urine and sonography tests and the reports came normal. i was under observation for one month. i took 2 niftas 100mg each day in those 30 days. after 1 week i again started getting bloody drops in my urine. i went to doctor. again we took blood, urine tests and ct scan. it was again caused by e coli. doctor recommended me to take niftran 100mg 2 times each day for 1 and half month. after 15 days i again started getting burning in urine, lose motions, stomach pain, fever. why is it happening even though i am taking antibiotics each day?