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J Vet Sci 2018; 19(2): 313-317  https://doi.org/10.4142/jvs.2018.19.2.313
Pathologic and molecular characterization of Streptococcus dysgalactiae subsp. equisimilis infection in neonatal piglets
Sang-Ik Oh1,2, Jong Wan Kim1, Ji-Youl Jung1, Myeongju Chae1, Yu-Ran Lee1, Jong Ho Kim1, ByungJae So1, Ha-Young Kim1,*
1Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
2Animal Disease & Biosecurity Team, National Institute of Animal Science, Wanju 55365, Korea
Correspondence to: Tel: +82-54-912-0491; Fax: +82-54-912-0499; E-mail: kimhy@korea.kr
Received: September 21, 2017; Revised: December 4, 2017; Accepted: December 26, 2017; Published online: March 31, 2018.
Streptococcus dysgalactiae subspecies equisimilis (SDSE) is an emerging pathogen in animals and humans. Herein, we describe two clinical swine cases of SDSE infection presenting with lameness, neurological signs, or sudden death. Pathological examination indicated suppurative arthritis, encephalitis, and multifocal abscesses in kidney and heart. The β-hemolytic colonies obtained from joint samples of each case were identified as SDSE. The two isolates had low minimum inhibitory concentrations for β-lactams, and they presented the same virulence gene profile (slo-/sagA/pSTKP8). Molecular analysis by multilocus sequence typing identified the SDSE isolates from cases 1 and 2 as sequence types 315 and 252, respectively.
Keywords: Streptococcus dysgalactiae subspecies equisimilis, microbial sensitivity tests, multilocus sequence typing, piglet

© 2018 The Korean Society of Veterinary Science.

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