Cystitis ·Usually caused by 。E.coli ·S.saprophyticus 。May also be caused by ·Proteus 。Klebsiella ·Enterococcus ·Pseudomonas E.coli usually causes pyelonephritis Antibiotic-sensitivity tests may be required before treatment • Usually caused by • E. coli • S. saprophyticus • May also be caused by • Proteus • Klebsiella • Enterococcus • Pseudomonas • E. coli usually causes pyelonephritis • Antibiotic-sensitivity tests may be required before treatment Cystitis