Research led by Dr Holmes has identified a novel variant of methicillin-resistant Staphylococcus aureus (MRSA) in livestock. This represents a previously unidentified reservoir of infection which has had impact on the epidemiology of MRSA and its management. This research also impacts on antibiotic use in agriculture and its role in the emergence of antibiotic resistance. As a consequence of these research findings commercial tests and testing protocols have been developed to detect the new MRSA variant, which are now used widely in clinical settings throughout Europe. The discovery has also been used to inform policy decisions at a governmental level in the USA and Europe.