About the Authors

Kristin M. Marshall

Current address: U.S. Food and Drug Administration, National Center for Food Safety and Technology, Summit-Argo, Illinois, United States of America

Marite Bradshaw
Eric A. Johnson

eajohnso@wisc.edu

Affiliation Department of Bacteriology, College of Agriculture and Life Sciences, University of Wisconsin, Madison, Wisconsin, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KMM MB EAJ. Performed the experiments: KMM MB. Analyzed the data: KMM MB EAJ. Contributed reagents/materials/analysis tools: KMM MB. Wrote the paper: KMM MB EAJ.