Main areas of research Riemerella infections in poultry Erysipelas in poultry - pathology, serotyping and epidemiology Respiratory diseases of poultry caused by viruses, including interactions between viruses, mycoplasma, bacteria and environment Salmonella infections in poultry Development and application of molecular methods for subspecies and serovar characterization of S. enterica Antigenic characterization of S. enterica serovar Berta and development of sensitive and specific immunoassays for detection of infections caused by this serovar Clonal transmission of S. enterica Plasmid mediated virulence expression Host specificity and pathogenesis Risk factors