In recent years, the focus has been on the pathways of infection for MRSA infections. The proportion of pig farms infected with the antibiotic-resistant staphylococcal bacterium MRSA CC398 - also called livestock MRSA - has grown from a few percent in 2010 to 88% in 2016, while the number of people infected with livestock MRSA has gone down from under 20 in 2010 to 2,018 cases. in 2016.

Research has shown that the antibiotic-resistant staphylococcal bacterial livestock MRSA can be detected in the air around livestock farms. There is also an increased risk of being infected with MRSA-CC398 if you live in a pig farm area. The Norwegian Serum Institute (SSI), DTU and the University of Aarhus are currently working together to investigate whether the infection can be spread to the immediate environment via dust emitted from the pig stables through the ventilation systems.