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. 2022 Jan 31;7(2):251–261. doi: 10.1038/s41564-021-01054-z

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Extended Data Fig. 6 — ML phylogenetic tree of each subtype was generated based on core genome SNPs. Serotypes determined through biochemical serotyping are displayed on the right-hand side of each tree, and coloured according to the inlaid key. The 26 inferred serotype switching events occurring along the phylogenetic branches are labelled accordingly. Numbers inside each backets represents switch IDs, with further details provided in Supplementary Table 4. Where the dominant serotype cannot be determined, a question mark is displayed, indicating switch from unknown ancestral type. Serotype switching events resulting in more than two descendant isolates are highlighted in red.