MRSA is a type of bacteria that's resistant to a number of widely used antibiotics. This means MRSA infections can be more difficult to treat than other bacterial infections. (NHS UK)
From May 2001 to April 2003, various types of specimens from cattle, pigs, and chickens were collected and examined for the presence of methicillin (oxacillin)-resistant Staphylococcus aureus (MRSA). S. aureus was isolated and positively identified by using Gram staining, colony morphology, tests for coagulase and urease activities, and an API Staph Ident system.