I am currently being treated for pyleonephritis in the left kidney. I am receiving outpatient Invanz infusions as the bacteria was previously noted to be a rare E-coli strain. However, before I began the infusion therapy, my urine was sent for a culture from the urologist's office. I received a call telling me that the culture was negative. I am still suffering from moderate to severe left flank pain and occasional night sweats. I am 55 yrs old, female, diabetic. I am 5'3" and weigh 240. Thank you