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. 2017 May 3;3(5):e000111. doi: 10.1099/mgen.0.000111

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© 2017 The Authors

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

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Fig. 4. — Minimum Spanning Trees (MSTs) showing the transmission route suggested by the genetic data. The colours represent the state from which the isolates were collected and the node sizes are representative of the number of isolates with that genotype. Open circles represent isolates with a known location, but no recorded date. From this analysis, it can be seen that transmission events from Pará introduced the Brazilian lineage to Goiás, Mato Grosso and either Rio de Janeiro or Espírito Santo in 2006, Rio Grande do Sul and Paraná in 2007 and Amazonas in 2010. The outbreak in São Paulo in 2008 was seeded either from Goiás or Pará. A transmission event from Rio de Janeiro to Paraná in 2007 is shown to be responsible for the majority of cases in this region.