Genetic analysis based on next generation sequencing of Streptococcus equi subsp. equi isolated from horses imported into Japan

Strangles is a globally widespread, commonly diagnosed and important infectious disease of equids caused by Streptococcus equi subsp. equi. We performed whole genome sequencing of 19 S. equi isolates collected from imported horses at the Japanese border. Of these isolates, 15 isolates were obtained...

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Bibliographic Details
Published in:Journal of Veterinary Medical Science 2024, Vol.86(8), pp.828-832
Main Authors: NAKAJIMA, Kei, KASUYA, Kazufumi, SENBA, Hironobu, TAGAMI, Katsunori, KINOSHITA, Yuta, NIWA, Hidekazu
Format: Article
Language:English
Subjects:
animal quarantine service
Antimicrobial resistance
Bacteriology
Bayesian analysis
Disease resistance
Genetic analysis
Genomic analysis
Infectious diseases
Next-generation sequencing
Population structure
Single-nucleotide polymorphism
Strangles
Streptococcus equi
Streptococcus infections
Whole genome sequencing
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Summary:Strangles is a globally widespread, commonly diagnosed and important infectious disease of equids caused by Streptococcus equi subsp. equi. We performed whole genome sequencing of 19 S. equi isolates collected from imported horses at the Japanese border. Of these isolates, 15 isolates were obtained from clinical cases and 4 were from subclinical cases. The 19 isolates were grouped into 3 Bayesian analysis of population structure (BAPS) groups by the core genome single nucleotide polymorphism analysis corresponding to exporting country, SeM typing, or exporter of the horses. The 19 isolates possessed same pathogenic genes regardless of clinical status in imported horses and no antimicrobial resistance genes. The disease status of the horses may rather reflect the prior exposure of animals with sub-clinical infection to S. equi.
ISSN:0916-7250
1347-7439
1347-7439
DOI:10.1292/jvms.23-0342