WebMD Medical News
Louise Chang, MD
May 28, 2007 -- A new study adds to concern that MRSA (methicillin-resistant Staphylococcus aureus) is rising in communities.
Staph infection, including MRSA, usually affects the skin and is minor. But some staph infections are serious and may enter the blood or other parts of the body.
MRSA and other staph infections usually spread in hospitals or other health care facilities. But they can also happen in communities. Poor hygiene and crowded living conditions are risk factors.
The new MRSA study, published in the Archives of Internal Medicine, included patients treated from 2000 to 2005 at a large public hospital in Chicago -- the John H. Stroger Jr. Hospital of Cook County.
The researchers included Bala Hota, MD, MPH, of Chicago's Rush University. They focused on patients who didn't get MRSA in a hospital or other health care facility.
Hota's team studied tissue culturesfrom patients with no hospitalizations or surgeries in the previous year.
They found nearly a sevenfold increase in community-acquired MRSA infections during the years studied, rising from 24 cases per 100,000 people in 2000 to 164 cases per 100,000 people in 2005.
The study shows no change in the rate of community-acquired staph infections that were not drug resistant.
Why is community-acquired MRSA increasing? Hota and colleagues aren't sure.
However, they note that the hospital they studied serves a high-risk population, including people who live in public housing and people who have recently spent time in jail. Living in crowded settings is a risk factor for MRSA infection.
Here are five tips from the CDC on preventing MRSA skin infections:
SOURCES: Hota, B. Archives of Internal Medicine, May 28, 2007; vol
167: pp 1026-1033. CDC: "Community-Associated MRSA Information for the
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