Acute uncomplicated bacterial cystitis is common in general practice. Cystitis is at the second raw of antibiotic treatment indications. It has been now recommended not to perform any urine culture for more than 20 years; hence, the bacterial epidemiology of acute uncomplicated cystitis is surprisingly relatively unknown. The available bacteriological data mainly describe the epidemiology of complicated urinary tract infections or upper urinary tract infections, but the causative bacteria and the resistance rates might differ from those of uncomplicated cystitis. As an example, it is unknown to what extent Staphylococcus saprophyticus is the causative agent of uncomplicated cystitis.