1. Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Lisburn Road, Belfast, Northern Ireland, BT9 7AD, Department of Pathogenic Biology, Xian Jiatong University, Xi'an, Shaanxi Province, The People's Republic of China, School of Biomedical Science, University of Ulster, Coleraine, County Londonderry, Northern Ireland
2. Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Lisburn Road, Belfast, Northern Ireland, BT9 7AD
3. Oral Research Group, School of Medicine & Dentistry, Queen's University, The Royal Group of Hospitals, Belfast, Northern Ireland
4. School of Biomedical Science, University of Ulster, Coleraine, County Londonderry, Northern Ireland
5. Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Lisburn Road, Belfast, Northern Ireland, BT9 7AD, School of Biomedical Science, University of Ulster, Coleraine, County Londonderry, Northern Ireland,