Swedish milk needs to be more internationally competitive. To achieve this objective costs related to production need to decrease at the same time as customer perceived values are strengthened and more clearly communicated. Lowering the incidence of mastitis reduces the production cost for farmers. A more targeted use of antibiotics, in combination with an increased welfare and extended life expectancy for cows builds a sustainability position and a competitive edge. In order to reduce the incidence of mastitis new and improved tools to monitor and evaluate udder health is required. The purpose of this project is to investigate and evaluate whether Differential Somatic Cell Count (DSCC) can be used to achieve this. If the project can show that the DSCC tool can be of help to improve udder health more efficiently, it can be included as a standard parameter to be used at test milking, and in doing so help to increase the competitiveness.