Low prevalence of Salmonella in Swedish dairy herds highlight differences between serotypes

We conclude that for future surveillance, the Bovine ELISA can be used to help in identifying infected herds, and the Dublin ELISA can be used to distinguish herds with S. Dublin infections. The geographical clustering of test positive herds could facilitate future surveillance and disease control interventions. The results highlight differences between S. Dublin and other serotypes, e.g. concerning prevalence and degree of geographical clustering. Further studies on risk factors and potential local spread of Salmonella is warranted, particularly in the regions with clustering of S. Dublin infected herds.