Øystein Angen worked for several years as veterinary surgeon in Norway and Denmark before he obtained his PhD in veterinary bacteriology at the Royal Veterinary and Agricultural University in Copenhagen. His research in bacteriology has focused on molecular epidemiology, phylogeny and taxonomy. This has included reclassification of several species within the family Pasteurellaceae and description of new genera for veterinary relevant pathogens. A long standing interest is bacteria within genus Mannheimia and development of detection and typing methods for Actinobacillus pleuropneumoniae. He has worked at the National Veterinary Institutes both in Denmark and Norway. The last three years he has been involved in research on MRSA at Statens Serum Institut in Copenhagen. The focus of this research has been modes of transmission of MRSA from the swine and farm environment to humans.