Genetic characterization of Legionella isolates collected during the 2012 Quebec City outbreak compared to other strains involved in large epidemics.

aPatient isolates related to the outbreak (patient), patient isolates obtained in the same period of time from elsewhere in the province of Quebec (contemporary), a subset of environmental isolates with different PFGE pattern than the epidemic strain (environment), isolates from the environmental source of the outbreak (source) and isolates from a former outbreak in the same area in 1996.bOne patient isolate had no plasmid (ID102206) and one patient isolate had only the 51.5 kb plasmid (ID120070).cA 131.9 kb plasmid was present (plasmid pLPP accession number NC_006365).dA 59.8 kb plasmid was present (plasmid pLPL accession number NC_006366).