Molecular Epidemiology of Staphylococcus aureus Colonization in 2 Long‐Term Care Facilities
Drs. Mody and Bradley are from the Geriatric Research Education and Clinical Center, Veterans Affairs Ann Arbor Healthcare System and from the Division of Geriatric Medicine, University of Michigan, Ann Arbor. Dr. Flannery, Mr. Beilaczyc, and Dr. Bradley are from the Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor.
Persistent colonization with Staphylococcus aureus was assessed in 22 nursing home residents. Eighteen residents (82%) remained colonized with the same strain found at baseline; 6 (33%) of 18 residents transiently acquired a new strain. Four residents (18%) acquired a new persistent strain. Residents colonized with methicillin‐resistant S. aureus were more likely to acquire a new strain (67%) than were residents colonized with methicillin‐susceptible S. aureus (20%) (
).
Received July 13, 2005; accepted September 27, 2005; electronically published February 8, 2006.
-
Presented in part at the Annual Meeting of the Society for Healthcare Epidemiology of America; Los Angeles, CA; April, 2005.



