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WASHINGTON (AP) - Drug-resistant staph bacteria picked up in ordinary community settings are increasinglyacquiring "superbug" powers and causing far more serious illnesses than they have in the past, doctors reportedMonday. These widespread germs used to be easier to treat than the dangerous forms of staph found in hospitalsand nursing homes.
"Until recently we rarely thought of it as a problem among healthy people in the community," said Dr. RachelGorwitz of the federal Centers for Disease Control and Prevention.
Now, the germs causing outbreaks in schools, on sports teams and in other social situations are posing agrowing threat. A CDC study found that at least 10 percent of cases involving the most common communitystrain were able to evade the antibiotics typically used to treat them.
"They're becoming more resistant and they're coming into the hospitals," where they swap gene componentswith other bacteria and grow even more dangerous, said Dr. Keith Klugman, an infectious disease expert atEmory University. "It's really a major epidemic." The germ is methicillin-resistant Staphylococcus aureus, or MRSA. People can carry it on their skin or in theirnoses with no symptoms and still infect others - the reason many hospitals isolate and test new patients to see ifthey harbor the bug.
MRSA mostly causes Cleveland Browns tight end Kellen Winslow was just hospitalized for astaph infection, his second in recent years, and the team reportedly has had at least six cases in the past threeyears.
But the germ can be life-threatening if it gets into the bloodstream, lungs or organs. Pneumonia, sinus infectionsand even "flesh-eating" wounds due to MRSA are on the rise, doctors reported Monday at an infectious diseasesconference in Washington.
About 95,000 serious infections and 20,000 deaths due to drug-resistant staph bacteria occur in the UnitedStates each year.
To treat them, "we've had to dust off antibiotics so old that they've lost their patent," said Dr. Robert Daum, apediatrician at the University of Chicago.
The CDC used a network of hospitals in nine cities and states to test samples of the most common communityMRSA strain, USA300, over the last few years.
MRSA usually is resistant only to penicillin-type drugs. But 10 percent of the 824 samples checked also couldevade clindamycin, tetracycline, Bactrim or other antibiotics.
"The drugs that doctors have typically used to treat staph infections are not effective against MRSA," andfamily doctors increasingly are seeing a problem only hospital infection specialists once did, Gorwitz said.
Even more worrisome: many of these community strains had features allowing them to easily swap genes andbecome even hardier.
Doctors from Spain reported the first hospital outbreak of MRSA resistant to linezolid, a last-resort drug sold byPfizer Inc. (as Zyvox in the United States and Zyvoxid in Europe. A dozen intensive care patients gotpneumonia and bloodstream infections last spring and the outbreak was controlled after use of the antibiotic wasseverely curbed, said Dr. Miguel Sanchez of Hospital Clinico San Carlos in Madrid.
Georgetown University saw a spike in sinus infections due to MRSA. The germ accounted for 69 percent of thestaph-caused cases in the hospital between 2004 and 2006 compared with 30 percent from 2001 to 2003.
Henry Ford Hospital in Detroit found that more than half of staph-caused pneumonia cases from 2005 through2007 were due to MRSA.
Doctors from Case Western Reserve University and the VA Medical Center in Cleveland found that by the timehospitals isolated and tested new patients to see if they harbored MRSA, many had already contaminated theirskin and surroundings. Within about a day of being admitted, roughly a third had already started to spread thegerm.
Hospital screening is controversial, and has had mixed success, said Dr. M. Lindsay Grayson, an infectiousdiseases expert at the University of Melbourne in Australia.
The nation's Veterans Affairs hospitals began universal MRSA testing in 2007. Illinois and some other stateshave adopted or are considering laws requiring hospitals to test high-risk and intensive-care patients for MRSA.
The conference is a meeting of the American Society for Microbiology and the Infectious Diseases Societyof America.

Source: http://gcwoa.org/Documents/MRSA%202008.pdf

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