A review of the epidemiology of paratuberculosis was published in two parts by Dr. Conor McAloon et al. in the April 2019 issue of The Veterinary Journal. Unfortunately the articles are not Open Access, meaning you must pay a fee to gain access to the full article unless your institution subscribes to the journal.
Dr. McAloon works in the Section of Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Ireland. He recently received his PhD and is one of the promising new young scientists in the field of paratuberculosis research. The reviews come from his thesis and are published in two parts: Part 1 concerns broader aspects of epidemiology of paratuberculosis, and Part 2 concerns on-farm control of paratuberculosis. Both are excellent and provide the most comprehensive and current information on the subject.
Epidemiology is a topic under each of the main animal species covered on this website. For example this link takes you to the epidemiology of Johne’s disease in dairy cattle: Dairy cattle/Epidemiology