<unk>  is an isolate of the bacterium<unk>  aureus  characterized by antibiotic resistance to all penicillins, including<unk>  and other narrow-spectrum β-lactamase-resistant penicillin antibiotics.<unk>  was discovered for the first time in 1961 in the United Kingdom, but it is now widespread in the hospital setting. <unk>  is commonly termed a superbug.<unk>  may also be known as oxacillin-resistant<unk>  aureus (ORSA) and multiple-resistant<unk>  aureus. Strains of S. aureus that are non-resistant to<unk>  are sometimes called<unk> -susceptible<unk>  aureus (MSSA) if an explicit distinction must be made.
Although<unk>  has traditionally been seen as a hospital-associated infection, community-acquired<unk>  strains have appeared in recent years, notably in the U.S. and Australia. The abbreviations CA-MRSA (community-acquired<unk>  and HA-MRSA (hospital-acquired<unk>  are now commonly seen in medical literature.
Methicillin-resistant staphylococcus aureus
Methicillin resistant staphylococcus aureus
Vancomycin-resistant Staphylococcus aureus
Vancomycin-resistant enterococci
Streptococcus anginosus
Streptococcus viridans
Enterococcus faecium
Streptococcus pyogenes