What should be the dose of levofloxacin 750 for chronic uti which has been recurring over the last 3 yrs? 3 years ago the prob caused by mrsa nd after that the root cause is e.coli nd it's recurring at an interval of 1 month what should be taken to kill the bacteria adhered to the wall of bladder and urethra even white discharge is also present along with pain in lower abdomen. Last year when I had an infection I got a psa test done and the result was 3.11.