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Abstract
We examined trends in incidence of methicillin-resistant Staphylococcus aureus (MRSA) infections in Connecticut, with emphasis on 2007-2010, after legislation required reporting of hospital infections. A case was defined as isolation of MRSA from normally sterile body sites, classified after medical record review as hospital onset (HO), community onset, health care-associated community onset (HACO), or community-associated (CA). Blood isolates collected during 2005-2010 were typed and categorized as community- or health care-related strains. During 2001-2010, a total of 8,758 cases were reported (58% HACO, 31% HO, and 11% CA), and MRSA incidence decreased (p<0.05) for HACO and HO, but increased for CA. Significant 3- to 4-year period trends were decreases in all MRSA (-18.8%), HACO (-12.8%), HO (-33.2%), and CA (-12.7%) infections during 2007-2010, and an increase in CA infections during 2004-2006. Decreases in health care-related isolates accounted for all reductions. Hospital infections reporting may have catalyzed the decreases.
Highlights
Increasing reports and growing public concern about Methicillin-resistant Staphylococcus aureus (MRSA) have prompted the Illinois Department of Public Health (IDPH) to publish the following report describing the burden of MRSA in Illinois hospitals
National data samples estimate that only about 14percent of invasive MRSA infections occur in the community, with the rest occurring in hospitals and health care facilities such as nursing homes and dialysis centers1
Other data sources, including the Hospital Report Card Act and the Illinois Department of Public Health surveillance activities, will provide additional insights into the extent to which MRSA infections occur as a direct result of hospitalization, as well as the epidemiology of community-associated MRSA infection
Summary
This report provides information about patients with. MRSA infections in Illinois hospitals and makes an overall national comparison. Due to the nature of the data available to the Department at this time, the report is limited to describing. This does not provide the number of people hospitalized already infected with MRSA, nor does it describe the scope of MRSA in the community. National data samples estimate that only about 14percent of invasive MRSA infections occur in the community, with the rest occurring in hospitals and health care facilities such as nursing homes and dialysis centers. MRSA occurs most frequently among patients who undergo invasive medical procedures or have weakened immune systems. MRSA in health care settings can cause serious and potentially life threatening infections, such as blood stream infections, surgical site infections, and pneumonia
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