1. Department of Clinical Microbiology, Beaumont Hospital,PO Box 1297, Beaumont Road, Dublin 8, Ireland
2. National MRSA Reference Laboratory, St James'sHospital, James's Street, Dublin 8, Ireland
3. Temenos Medical Centre, Malahide, Dublin, Ireland
4. Health Protection Surveillance Centre, 25–27Middle Gardiner Street, Dublin 1, Ireland
5. Department of Clinical Microbiology, RCSI Educationand Research Centre, Smurfit Building, Beaumont Hospital, PO Box 9063, Dublin9, Ireland