1. UCD Veterinary Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland
2. Department of Clinical Microbiology, St Vincent’s University Hospital, Elm Park, Dublin 4, Ireland
3. Department of Medicine for the Older Person, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland
4. Health Protection and Surveillance Centre, Gardiner Street, Dublin 1, Ireland
5. Department of Clinical Microbiology, Beaumont Hospital, Beaumont Road, Dublin 9, Ireland