Table of Contents
ISRN Orthopedics
Volume 2012, Article ID 437675, 6 pages
Research Article

Bacterial Findings in Infected Hip Joint Replacements in Patients with Rheumatoid Arthritis and Osteoarthritis: A Study of 318 Revisions for Infection Reported to the Norwegian Arthroplasty Register

1Department of Orthopaedics, Haukeland University Hospital, 5021 Bergen, Norway
2Section of Infectious Diseases, Medical Department, Haukeland University Hospital, 5021 Bergen, Norway
3Norwegian Arthroplasty Register, Haukeland University Hospital, 5009 Bergen, Norway
4University of Bergen, Bergen, Norway
5Department of Rheumatology, Haukeland University Hospital, 5021 Bergen, Norway

Received 18 July 2012; Accepted 19 September 2012

Academic Editors: L. Jeys and H. R. Song

Copyright © 2012 J. C. Schrama et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


High rates of Staphylococcus aureus are reported in prosthetic joint infection (PJI) in rheumatoid arthritis (RA). RA patients are considered to have a high risk of infection with bacteria of potentially oral or dental origin. One thousand four hundred forty-three revisions for infection were reported to the Norwegian Arthroplasty Register (NAR) from 1987 to 2007. For this study 269 infection episodes in 255 OA patients served as control group. In the NAR we identified 49 infection episodes in 37 RA patients from 1987 to 2009. The RA patients were, on average, 10 years younger than the OA patients and there were more females (70% versus 54%). We found no differences in the bacterial findings in RA and OA. A tendency towards a higher frequency of Staphylococcus aureus (18% versus 11%) causing PJI was found in the RA patients compared to OA. There were no bacteria of potential odontogenic origin found in the RA patients, while we found 4% in OA. The bacteria identified in revisions for infection in THRs in patients with RA did not significantly differ from those in OA. Bacteria of oral or dental origin were not found in infected hip joint replacements in RA.