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. 2014 Jan 6;14:5. doi: 10.1186/1471-2180-14-5

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Copyright © 2014 Meng et al.; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Genetic relationships of STEC isolates based on MLST. A) Genetic relationships of STEC sequence types (STs) from this study. Each circle represents a given ST with size proportional to the number of isolates. The colors for the slices of the pie represent places of isolates: Beijing city in green, Chongqing city in red and Guizhou province in purple. The numbers on connecting lines show the number of allelic difference between two STs. The number in a circle is the ST number. B) Minimal spanning tree of STs from this study, STs from the HUSEC collection and other human STEC STs. Ninety-three pig STEC isolates (in red) were compared to STs of HUSEC collection (in orange), human STEC STs (in green) and STs from other source that are identical to STs in our study (in blue) in E. coli MLST database. Each circle represents a given ST with the pie proportional to number of isolates in a given ST from different sources. The numbers on connecting lines show the number of allelic difference between two STs. The number in a circle is the ST number.