The peculiarity of our study with respect to the data recorded in other studies, related to ADA activity, in cattle with similar processes (mastitis or laminitis) is the time chosen for the assessment, as in our study it widely exceeds the post-partum stage, and even the peak lactation (Frtizen et al. 2016, Sordillo and Maravinga 2014). Here, ADA is linked to mastitis.