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Phylogenetic reconstruction using 827 core biallelic SNP loci of emm92 GAS strains from Houston (n=19) and the CDC ABCs (n=239) relative to the reference TSPY556. Node colour and shape indicate year of isolation and geographical location, respectively (see node legend). Resistance genotypes for aminoglycosides (AG), MLS and tetracycline (Tet) are shown on right, and coloured by allele (see resistance legend).
