Increase in invasive Streptococcus pyogenes M1 infections with close evolutionary genetic relationship, Iceland and Scotland, 2022 to 2023
Stephen B. Beres, Randall J. Olsen, S. Wesley Long, Ross Langley, Thomas Williams, Helga Erlendsdóttir, Andrew Smith, Karl G. Kristinsson, James M. Musser
Abstract
Group A Streptococcus isolates of the recently described M1 UK clade have emerged to cause human infections in several European countries and elsewhere. Full-genome sequence analysis of M1 isolates discovered a close genomic relationship between some isolates from Scotland and the majority of isolates from Iceland causing serious infections in 2022 and 2023. Phylogenetic analysis strongly suggests that an isolate from or related to Scotland was the precursor to an M1 UK variant responsible for almost all recent M1 infections in Iceland.
Topics & Concepts
CladePhylogenetic treeStreptococcus pyogenesBiologyWhole genome sequencingGenomePhylogeneticsGeneticsMicrobiologyGeneBacteriaStaphylococcus aureusStreptococcal Infections and TreatmentsAntimicrobial Resistance in StaphylococcusInfective Endocarditis Diagnosis and Management