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)
Figure 6. Geographic distribution of phylogenetic clusters II and I/III from 1990 through 2007. Rates are cases of infection with Legionella pneumophilia serogroup 1 clones per 100,000 persons per year. The province of Ontario was divided into 7 health regions (OHRs) with populations ranging from ≈0.5 to 2 million persons: Toronto, South West (SW), Central South (CS), Central West (CW), Central East (CE), East, and North.
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