1. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts, USA
2. Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
3. Unité Mixte de Recherche, Centre National de Recherche Scientifique 7138, Systématique, Adaptation, Evolution, Université Pierre et Marie Curie, 75005 Paris, France
4. Listeria, Yersinia, Vibrio and Enterobacteriaceae Reference Laboratories, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA