Emerging Infectious Disease ISSN: 1080-6059

New Endemic Legionella pneumophila Serogroup I Clones, Ontario, Canada

Nathalie Tijet, Patrick Tang, Mya Romilowych, Carla Duncan, Victoria Ng, David N. Fisman, Frances Jamieson, Donald E. Low, and Cyril Guyard

Author affiliations: Ontario Agency for Health Protection and Promotion, Toronto, Ontario, Canada (N. Tijet, P. Tang, M. Romilowych, C. Duncan, D.N. Fisman, F. Jamieson, D.E. Low, C. Guyard); Research Institute of the Hospital for Sick Children, Toronto (V. Ng, D.N. Fisman); Australian National University, Canberra, Australian Capital Territory, Australia (V. Ng); University of Toronto, Toronto (F. Jamieson, D.E. Low, C. Guyard); Mount Sinai Hospital, Toronto (F. Jamieson, D.E. Low, C. Guyard)

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Figure 2

Dendrogram created by the unweighted pair group method with arithmetic mean method based on the 62 allelic profiles of 194 Legionella pneumophila serogroup 1 isolates. Clonal groups (CGs) identified by eBURST (http://eBURST.mlst.net) are indicated with solid lines, and STs included in CGs are in boldface. Ontario STs included in clonal complexes (CC) identified by comparative eBURST analysis with the European Working Group for Legionella Infections database are indicated with dashed lines. The 3

Figure 2. Dendrogram created by the unweighted pair group method with arithmetic mean method based on the 62 allelic profiles of 194 Legionella pneumophila serogroup 1 isolates. Clonal groups (CGs) identified by eBURST (http://eBURST.mlst.net) are indicated with solid lines, and STs included in CGs are in boldface. Ontario STs included in clonal complexes (CC) identified by comparative eBURST analysis with the European Working Group for Legionella Infections database are indicated with dashed lines. The 3 major clusters are indicated on the right of the figure with bold lines. The number of strains isolated in Ontario is indicated below CG. Scale bar indicates linkage distances.

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