1. 1U.S. Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC-East, Beltsville, Maryland 20705, USA
2. 2Centre for Food-borne and Animal Parasitology, Saskatoon Laboratory, Canadian Food Inspection Agency, 116 Veterinary Road, Saskatoon, Saskatchewan, Canada S7N 2R3
3. 3U.S. Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center, Diet, Genomics, and Immunology Laboratory, BARC-East, Beltsville, Maryland 20705, USA
4. 4National Academy of Sciences, Policy and Global Affairs Division, 500 Fifth Street N.W., Washington, D.C. 20001, USA