Anne M. Zajac, DVM, MS, PhD, DACVM-Parasit., is Professor in the Department of Biomedical Sciences and Pathobiology at the Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia.

Gary A. Conboy, BSc, DVM, PhD, DACVM-Parasit., is Professor in the Department of Pathobiology and Microbiology at the Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada.

Susan E. Little, DVM, PhD, DACVM-Parasit., is Regents Professor and the Krull-Ewing Professor in Veterinary Parasitology at the College of Veterinary Medicine, Oklahoma State University, Stillwater, Oklahoma, USA.

Mason V. Reichard, MS, PhD, is Professor of Veterinary Parasitology at the College of Veterinary Medicine, Oklahoma State University, Stillwater, Oklahoma, USA.