Fig. 1: Population structure and geographic distribution of BSI-derived S. aureus during 2019–2020. | Nature Communications

Fig. 1: Population structure and geographic distribution of BSI-derived S. aureus during 2019–2020.

From: Staphylococcus aureus ST764-SCCmecII high-risk clone in bloodstream infections revealed through national genomic surveillance integrating clinical data

Fig. 1

a Midpoint-rooted maximum-likelihood (ML) tree showing the phylogenetic structure of 580 S. aureus isolates during 2019–2020. The scale bar represents the number of nucleotide substitutions per site. Matrix shows the metadata; 1, Bayesian analysis of population structure (BAPS) sequence cluster (SC) number identified by FastBAPS; 2, Sequence type (ST) number of each S. aureus isolate; 3, indicates the eastern or western Japan where S. aureus was isolated; 4, indicates the SCCmec type of MRSA. The pie graph shows the proportion of the metadata 1–4. ST with less than 3 isolates included in other. b Genotypic distribution in eastern or western Japan. ST under top 10 included in other. c Comparison of geographic proportions of STs is shown in SC1, SC3, and SC8. The color tone is shown in the same pattern in Fig. 1. *p < 0.05; western Japan vs. eastern Japan. P-value (p) was calculated using the χ2 test. Metadata information of 580 S. aureus isolated in 2019–2020 is summarized in Supplementary Data 1.

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