MRSA rates have declined since 2005

Rates of both hospital acquired and community acquired methicillin-resistant Staphylococcus aureus (MRSA) infection have declined between the years 2005 and 2010, according to a study in the Journal of the American Medical Association.

The study examined medical record data from the Department of Defense TRICARE beneficiaries from January 2005 through December 2010. 

Key findings from the study include:

  • The annual incidence rates for community-onset MRSA bacteremia decreased from 1.7 per 100,000 person-years in 2005 to 1.2 per 100,000 person-years in 2010.
  • The annual incidence rates for hospital-onset MRSA bacteremia also decreased from 0.7 per 100,000 person-years  in 2005 to 0.4 per 100,000 person-years in 2010.
  • The proportion of community-onset skin and soft tissue infection due to MRSA peaked at 62% in 2006 before decreasing annually to 52% in 2010.

The authors state that additional studies are needed to assess whether these trends will continue, which prevention methods are most effective, and to what degree other factors may be contributing.

(AHA News Now, http://www.ahanews.com/, July 6, 2012; Journal of the American Medical Association, http://jama.jamanetwork.com/, July 4, 2012)