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Volume 27, Number 7—July 2021
Research

Whole-Genome Analysis of Streptococcus pneumoniae Serotype 4 Causing Outbreak of Invasive Pneumococcal Disease, Alberta, Canada

James D. KellnerComments to Author , Leah J. Ricketson, Walter H.B. Demczuk, Irene Martin, Gregory J. Tyrrell, Otto G. Vanderkooi, and Michael R. Mulvey
Author affiliations: University of Calgary, Calgary, Alberta, Canada (J.D. Kellner, L.J. Ricketson, O.G. Vanderkooi); Alberta Health Services, Calgary Zone, Calgary (J.D. Kellner, O.G. Vanderkooi); National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada (W.H.B. Demczuk, I. Martin, M.R. Mulvey); University of Alberta, Edmonton, Alberta (G.J. Tyrrell); Alberta Precision Laboratories–Public Health, Edmonton (G.J. Tyrrell)

Main Article

Figure 3

Maximum-likelihood core SNV phylogenetic tree of 159 Streptococcus pneumoniae serotype 4 ST244 isolates collected in Alberta, Canada, 2010–2018. A total of 615 sites were used in the phylogeny, and 97.4% of the core genome was included. An internal isolate SC19-3744-P (oldest outlier) was used as a mapping reference and root. Red nodes indicate isolates from the Calgary region, blue nodes those from Edmonton; triangles indicate association with homelessness. Scale bar indicates genetic distance. SNV, single nucleotide variant; ST, sequence type.

Figure 3. Maximum-likelihood core SNV phylogenetic tree of 159 Streptococcus pneumoniae serotype 4 ST244 isolates collected in Alberta, Canada, 2010–2018. A total of 615 sites were used in the phylogeny, and 97.4% of the core genome was included. An internal isolate SC19-3744-P (oldest outlier) was used as a mapping reference and root. Red nodes indicate isolates from the Calgary region, blue nodes those from Edmonton; triangles indicate association with homelessness. Scale bar indicates genetic distance. SNV, single nucleotide variant; ST, sequence type.

Main Article

Page created: April 23, 2021
Page updated: June 16, 2021
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