Genetic characterization of Theileria equi infecting horses in North America: evidence for a limited source of U.S. introductions. - Hall, Carina M.; Busch, Joseph D.; Scoles, Glen A.; Palma-Cagle, Kristina A.; Ueti, Massaro W.; Kappmeyer, Lowell S.; Wagner, David M. (Parasites & Vectors, 2013)