Volume 26, Number 10—October 2020
Research Letter
Streptococcus equi Subspecies zooepidemicus and Sudden Deaths in Swine, Canada
Figure
![Phylogenetic tree (all-shared proteins) of Streptococcus equi subspecies zooepidemicus whole-genome sequences obtained from outbreak in pigs from Canada (blue blocks, PRJNA578379), compared with previously characterized genome sequences from GenBank (n = 28). Tree inferred using BLAST (https://blast.ncbi.nlm.nih.gov), followed by FastTree within the PATRIC package (5). Support values shown indicate the number of times a particular branch was observed in the support trees using gene-wise jackknif](/eid/images/19-1485-F1.jpg)
Figure. Phylogenetic tree (all-shared proteins) of Streptococcus equi subspecies zooepidemicus whole-genome sequences obtained from outbreak in pigs from Canada (blue blocks, PRJNA578379), compared with previously characterized genome sequences from GenBank (n = 28). Tree inferred using BLAST (https://blast.ncbi.nlm.nih.gov), followed by FastTree within the PATRIC package (5). Support values shown indicate the number of times a particular branch was observed in the support trees using gene-wise jackknifing. Shaded colors reflect similar host taxonomy associated with a branch (>3 isolates).
References
- Pelkonen S, Lindahl SB, Suomala P, Karhukorpi J, Vuorinen S, Koivula I, et al. Transmission of Streptococcus equi subspecies zooepidemicus infection from horses to humans. Emerg Infect Dis. 2013;19:1041–8.
- FitzGerald W, Crowe B, Brennan P, Cassidy JP, Leahy M, McElroy MC, et al. Acute fatal haemorrhagic pneumonia caused by Streptococcus equi zooepidemicus in greyhounds in Ireland with subsequent typing of the isolates. Vet Rec. 2017;181:119. DOIPubMedGoogle Scholar
- Kernaghan S, Bujold AR, MacInnes JI. The microbiome of the soft palate of swine. Anim Health Res Rev. 2012;13:110–20. DOIPubMedGoogle Scholar
- Feng Z, Hu J. Outbreak of swine streptococcosis in Sichan province and identification of pathogen. Anim Husbandry Vet Med Lett. 1977;2:7–12.
- Wattam AR, Davis JJ, Assaf R, Boisvert S, Brettin T, Bun C, et al. Improvements to PATRIC, the all-bacterial Bioinformatics Database and Analysis Resource Center. Nucleic Acids Res. 2017;45:D535–42.
- Waller AS, Robinson C. Streptococcus zooepidemicus and Streptococcus equi evolution: the role of CRISPRs. Biochem Soc Trans. 2013;41:1437–43. DOIPubMedGoogle Scholar
- Kelly C, Bugg M, Robinson C, Mitchell Z, Davis-Poynter N, Newton JR, et al. Sequence variation of the SeM gene of Streptococcus equi allows discrimination of the source of strangles outbreaks. J Clin Microbiol. 2006;44:480–6.
- Mao Y, Fan H, Zhou Y, Lu C. Immunoproteomic assay of antigenic surface proteins in Streptococcus equi ssp. zooepidemicus. Agric Sci China. 2011;10:1096–105. DOIGoogle Scholar
- Xu, B., Zhang, P., Zhou, H., Sun, Y., Tang, J., & Fan, H. (2019). Identification of novel genes associated with anti‐phagocytic functions in Streptococcus equi subsp. zooepidemicus. Vet Microbiol, 233, 28–38.
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