Medical Definition of MRSA
: any of several strains of a bacterium (Staphylococcus aureus) that are resistant to methicillin and related antibiotics (such as penicillin) and often live harmlessly on skin and mucous membranes but may cause usually mild infections of the skin or sometimes more severe infections (as of the blood, lungs, or bone) especially in hospitalized or immunocompromised individuals <The rise of superbugs that can survive multiple antibiotics—such as MRSA, the notorious “flesh-eating bacterium”—has turned once-trivial infections into persistent problems.—Valerie Ross, Discover, September 2010> <MRSA—methicillin-resistant Staphylococcus aureus—lives harmlessly in the noses and on the skin of millions of people, but can cause serious harm if it enters the body through a cut and reaches the bloodstream, attacking bones and tissue.—Bob Meadows, People, 5 Nov. 2007> <But in 2002 strains of MRSA that were also resistant to vancomycin began to emerge in hospitals.—Christopher T. Walsh et al., Scientific American, July 2009>—see ca-mrsa
Origin of mrsa
methicillin-resistant Staphylococcus aureus
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Dictionary: Definition of "MRSA"
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