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. 2021 Nov 11;7(11):000659. doi: 10.1099/mgen.0.000659

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© 2021 The Authors

This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial License.

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Fig. 4. — Variably-presented virulence factors of 1654 B. pseudomallei isolates. (a) Phylogenetic tree with two rings shows the distribution of two variably occurring virulence factors (VFs): boaB (yellow) and chbp (green). The outer ring represents the five major groups, which contain global strains (black) and Hainan isolates (red). (b) Histogram shows the percentage of Hainan B. pseudomallei isolates in the five major groups that contain the virulence factor gene boaB; boaB is present in 56 % of the Hainan strains in group 1, but is almost absent from the other major groups.