Outbreak of nosocomial multidrug-resistant Enterobacter aerogenes in a geriatric unit: failure of isolation contact, analysis of risk factors, and use of pulsed-field gel electrophoresis.

We describe herein an outbreak of Enterobacter aerogenes in a geriatric acute unit with failure of contact isolation that necessitated the temporary closure of the department. We emphasize the need for guidelines for the management of multiresistant bacteria.