Foodborne Outbreak and Nonmotile Salmonella enterica Variant, France
Simon Le Hello , Anne Brisabois, Marie Accou-Demartin, Adeline Josse, Muriel Marault, Sylvie Francart, Nathalie Jourdan Da Silva, and François-Xavier Weill
Author affiliations: Institut Pasteur, Paris, France (S. Le Hello, M. Accou-Demartin, A. Josse, F.-X. Weill); Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement, et du Travail, Maison-Alfort, France (A. Brisabois, M. Marault); Ministère de l’Alimentation de l’Agriculture et de la Pêche, Paris (S. Francart); Institut National de Veille Sanitaire, Saint-Maurice, France (N. Jourdan-Da Silva)
Figure. Minimum-spanning tree of multilocus variable number tandem repeat analysis (MLVA) of Salmonella enterica serotype 1,4,,12:–:– strains isolated from humans and nonhumans during 2001–2009, France. Each MLVA type is indicated by 1 node or branch tip, displayed as circles that are connected by branches of minimum-spanning tree. The length and the color of the branches represent genetic distances (changes in loci) between 2 neighboring types. The sizes of the different color circles depend on their population size. Wedges in circles indicate the proportion of isolates from respective sources with a particular MLVA type. A complex is shown in the black rectangle, based on maximum neighbor distance of changes at 2 loci and minimum size of 2 types. This specific complex linked the tiramisu food poisoning strains and other loci-derived strains for 2005–2009.
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