A type of MRSA found in humans originated in cattle at least 40 years ago, new research has claimed.
Edinburgh researchers said they had “clear evidence” that livestock was the original source of an MRSA strain now widespread in people. They studied the genetic make-up of 40 strains of a bacterium, Staphylococcus aureus, that can build up antibiotic resistance to develop into MRSA. The Roslin Institute at Edinburgh University carried out the research.
At least two genetic subtypes of the bacterium, which have become endemic in people, were traced back to cattle by the scientists.
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