About the Authors

Dennis vanEngelsdorp

Affiliations Pennsylvania Department of Agriculture, Harrisburg, Pennsylvania, United States of America, Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Jay D. Evans

Affiliation United States Department of Agriculture (USDA) – Agricultural Research Service (ARS) Bee Research Laboratory, Beltsville, Maryland, United States of America

Claude Saegerman

Affiliation Department of Infectious and Parasitic Diseases, Epidemiology and Risk analysis applied to the Veterinary Sciences, University of Liege, Liege, Belgium

Chris Mullin

Affiliation Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Eric Haubruge

Affiliation Department of Functional and Evolutionary Entomology, Gembloux Agricultural University, Gembloux, Belgium

Bach Kim Nguyen

Affiliation Department of Functional and Evolutionary Entomology, Gembloux Agricultural University, Gembloux, Belgium

Maryann Frazier

Affiliation Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Jim Frazier

Affiliation Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Diana Cox-Foster

Affiliation Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Yanping Chen

Affiliation United States Department of Agriculture (USDA) – Agricultural Research Service (ARS) Bee Research Laboratory, Beltsville, Maryland, United States of America

Robyn Underwood

Affiliation Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

David R. Tarpy

Affiliation Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America

Jeffery S. Pettis

Jeffery.Pettis@ars.usda.gov

Affiliation United States Department of Agriculture (USDA) – Agricultural Research Service (ARS) Bee Research Laboratory, Beltsville, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: Dv JSP. Performed the experiments: Dv JDE CM MF JF DRT. Analyzed the data: Dv CS EH BKN RMU. Contributed reagents/materials/analysis tools: JDE CM MF JF DLCF YPC DRT. Wrote the paper: Dv JDE CS CM EH BKN RMU DRT JSP.