The tree is created using UPGMA and distances shown are computed based on pairwise allelic differences (hamming distance). Missing genes are not included in the count.
Harris SR et al.
The 1928D Staphylococcus aureus cgMLST schema is created from 123 reference genomes giving the scheme 1700 core genes. All genes included in the schema are present in at least 95% of reference genomes.