About the Authors

Annette M. O'Connor

oconnor@iastate.edu

Affiliation Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America

Brent Auvermann

Affiliation Texas AgriLife Research, Amarillo, Texas, United States of America

Danelle Bickett-Weddle

Affiliation Center For Food Security/Public Health, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America

Steve Kirkhorn

Affiliation National Farm Medicine Center, Marshfield Clinic, Marshfield, Wisconsin, United States of America

Jan M. Sargeant

Affiliation Centre for Public Health and Zoonoses, and Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada

Alejandro Ramirez

Affiliation Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America

Susanna G. Von Essen

Affiliation Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AO. Analyzed the data: AO. Wrote the paper: AO. Reviewed papers, participated in meetings and commented on manuscript drafts: BA DB-W SK JS AR SVE.