Institution: | .Animal Parasitic Diseases Laboratory, ARS, USDA, Beltsville, MD USA ;.Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB Canada ;.Department of Animal Science, Iowa State University, Ames, IA USA ;.Institute for Animal Science, Physiology and Hygiene Unit, University of Bonn, Katzenburgweg 7-9, 53115 Bonn, Germany |