About the Authors

Michael Cooley

To whom correspondence should be addressed. E-mail: mcooley@pw.usda.gov (MC); mandrell@pw.usda.gov (RM)

Affiliation Produce Safety and Microbiology Research Unit, United States Department of Agriculture-Agricultural Research Service, Western Regional Research Center, Albany, California, United States of America

Diana Carychao

Affiliation Produce Safety and Microbiology Research Unit, United States Department of Agriculture-Agricultural Research Service, Western Regional Research Center, Albany, California, United States of America

Leta Crawford-Miksza

Affiliation California Department of Health Services, Food and Drug Laboratory Branch, Richmond, California, United States of America

Michele T. Jay

Affiliation California Department of Health Services, Food and Drug Laboratory Branch, Richmond, California, United States of America

Carol Myers

Affiliation California Department of Health Services, Food and Drug Branch, California, United States of America

Christopher Rose

Affiliation Central Coast Regional Water Quality Control Board, California Environmental Protection Agency, San Louis Obispo, California, United States of America

Christine Keys

Affiliation Food and Drug Administration/Center for Food Safety and Applied Nutrition (CFSAN)/Office of Plant and Dairy Foods (OPDF)/DMS, College Park, Maryland, United States of America

Jeff Farrar

Affiliation California Department of Health Services, Food and Drug Branch, California, United States of America

Robert E. Mandrell

To whom correspondence should be addressed. E-mail: mcooley@pw.usda.gov (MC); mandrell@pw.usda.gov (RM)

Affiliation Produce Safety and Microbiology Research Unit, United States Department of Agriculture-Agricultural Research Service, Western Regional Research Center, Albany, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RM LC JF MC. Performed the experiments: LC MJ CM CR MC DC. Analyzed the data: RM LC MJ CM MC DC CK. Contributed reagents/materials/analysis tools: LC MJ MC. Wrote the paper: RM MC.