100 years of udder health.

In 2017, the Journal of Dairy Science (JDS) celebrated 100 years of continuous publication. To mark that milestone, the journal's editor commissioned 30 comprehensive reviews of progress in dairy research with emphasis on research that had been published in JDS (McNamara and Lucy, 2017). I was asked to write a review of progress in udder health (Ruegg, 2017) and while I realized a bit too late that my agreement meant that I needed to review 100 years of research, the process of reading and contemplating the past century of progress in udder health was thoroughly enjoyable. During the process of writing the paper, I learned an enormous amount about the history of udder health research and in this brief article I will highlight a few items of interest from the last century of research in our field. [ABSTRACT FROM AUTHOR]