The prevention, detection and treatment of mastitis form the basis for contemporary udder health management. After detection and initiation of treatment, the recovery, being the suppression of the causal pathogen (bacteriological healing), the disappearance of clinical symptoms and the regeneration of the udder tissue (clinical healing), is almost objec- tively monitored. Due to lack of information about this recovery, it is impossible for the dairy farmer to estimate the effectiveness of the treatment and to adjust treatment duration and further support. Dlt results in excessive antibiotic use in the case of too long treatment and, secondly, the absence of complete recovery by too short or suboptimal treatment.