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Neighbor-net network based on 1,605 core genes for isolates belonging to the South American lineage, the original U.K. lineage, and the novel U.K. 2013 lineage, which all belong to the South American sublineage of serogroup W CC11. MenW CC11 invasive isolates from Sweden collected in 1995 to 2014 (n = 8) are shown as red dots, and isolates collected in 2015 to 2017 (n = 27) are shown as green dots. The distance between isolates was defined as the number of loci with allelic differences.
