Spread of a Klebsiella pneumoniae Strain Producing a Plasmid- Mediated ACC-1 AmpC β-Lactamase in a Teaching Hospital Admitting Disabled Patients

We describe a large outbreak involving a Klebsiella pneumoniae strain producing a plasmid-encoded ACC-1 type AmpC β-lactamase in a hospital caring for patients with motor impairment. The epidemic strain was isolated from 57 patients in six wards between September 1999 and May 2003 and caused clinical infections in 19 patients.