Nosocomial Bacteriuria in Geriatric Internal Medicine Services and Follow-up Care and Geriatric Rehabilitation of the Strasbourg University Hospitals

Inclusion Criteria: * patient of age who has been hospitalized in geriatric wards (rehabilitation car service and internal medicine) of Strasbourg's University hospital * date of hospital leaving after 1/1/17 and before 1/1/18 * patient who has a health-care urinary tract infection (occurred more than 48h after admission) * single bacteria in the CBEU * bacteriuria \> 105 cfu/mL regardless which clinical context or bacteria * if a patient has several bacteriuria, they can be included if they appear after a precedent episode well treated or if the bacteria is different from the precedent Exclusion Criteria: * participation refusal * Leaving of hospital out of the inclusion period * Urinary tract infection which occurred less than 48h after admission (communitarian infection) * bacteriuria \< 105 cfu/mL * multiple bacteria in the CBEU