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Fig. 1 | Genome Biology

Fig. 1

From: Methicillin-resistant Staphylococcus aureus emerged long before the introduction of methicillin into clinical practice

Fig. 1

Population structure of historic MRSA isolates. a Maximum likelihood tree of historic MRSA isolates. The tree was built using a maximum likelihood method using SNPs from the core genome of 209 isolates. Included in the phylogeny is the COL reference isolate to which the sequence reads were mapped. The tree is rooted with RH12000692_7401696 as an outgroup; this is a CC8 isolate and is a triple locus variant of ST250. Tree branches are coloured according to their ancestral sequence type population; blue branches indicate the ST250 population and green branches the ST247 population. Isolates from Denmark are highlighted in blue shading and isolates described in the Jevons study are outlined in the dashed box, and a zoomed in view of the phylogeny is displayed in b. The coloured branch labels indicate the three individuals who supplied the original isolates in the Jevons study

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