Invasive Group A Streptococcus Hypervirulent M1UK Clone, Canada, 2018–2023
Alyssa R. Golden
, Averil Griffith, Gregory J. Tyrrell, Julianne V. Kus, Allison McGeer, Marc-Christian Domingo, Jennifer Grant, Jessica Minion, Paul Van Caeseele, Guillaume Desnoyers, David Haldane, Yang Yu, Xiaofeng Ding, Laura Steven, Jan McFadzen, Courtney Primeau, and Irene Martin
Author affiliation: Public Health Agency of Canada, Winnipeg, Manitoba, Canada (A. Golden, A. Griffith, I. Martin); Provincial Laboratory for Public Health (Microbiology), Edmonton, Alberta, Canada (G.J. Tyrrell); Public Health Ontario, Toronto, Ontario, Canada (J.V. Kus); University of Toronto, Toronto (J.V. Kus); Mount Sinai Hospital, Toronto (A. McGeer); Institut National de Santé Publique du Québec, Sainte-Anne-de-Bellevue, Québec, Canada (M-.C. Domingo); British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada (J. Grant); Roy Romanow Provincial Laboratory, Regina, Saskatchewan, Canada (J. Minion); Cadham Provincial Laboratory, Winnipeg (P. Van Caeseele); Laboratoire de Santé Publique du New Brunswick, Moncton, New Brunswick, Canada (G. Desnoyers); Queen Elizabeth II Health Science Centre, Halifax, Nova Scotia, Canada (D. Haldane); Newfoundland and Labrador Public Health Laboratory, St. John’s, Newfoundland, Canada (Y. Yu); Queen Elizabeth Hospital, Charlottetown, Prince Edward Island, Canada (X. Ding); Stanton Territorial Hospital Laboratory, Yellowknife, Northwest Territories, Canada (L. Steven); Yukon Communicable Disease Control, Whitehorse, Yukon, Canada (J. McFadzen); Public Health Agency of Canada, Ottawa, Ontario, Canada (C. Primeau)
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Figure 2
Figure 2. Maximum-likelihood core single-nucleotide variant phylogeny for 1,069 invasive group A Streptococcus M1UK lineage isolates collected in Canada, 2018–2023. Eleven large clusters are shown, each containing 10–280 isolates.
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