- Have a diagnosis of intractable UTI/pyelonephritis infection anticipated to require more than 14 days of study drug therapy, a permanent indwelling bladder catheter or instrumentation including nephrostomy or current urinary catheter that will not be removed or anticipation of urinary catheter placement that will not be removed during the course of iv study drug therapy administration, complete and permanent obstruction of the urinary tract, confirmed fungal UTI, suspected or confirmed perinephric or intrarenal abscess, suspected or confirmed prostatitis, known ileal loops, or any of the following clinically significant laboratory abnormalities: absolute neutrophil count (ANC) <500 cells/µL, platelet count <40,000 cells/µL, serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), or total bilirubin >5x the age-specific upper limit of normal (ULN), acute or chronic renal insufficiency with a baseline creatinine clearance <60 mL per minute or requires dialysis therapy for any reason