J Vet Sci.  2018 Mar;19(2):313-317. 10.4142/jvs.2018.19.2.313.

Pathologic and molecular characterization of Streptococcus dysgalactiae subsp. equisimilis infection in neonatal piglets

Affiliations
  • 1Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea. kimhy@korea.kr
  • 2Animal Disease & Biosecurity Team, National Institute of Animal Science, Wanju 55365, Korea.

Abstract

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.

Keyword

Streptococcus dysgalactiae subspecies equisimilis; microbial sensitivity tests; multilocus sequence typing; piglet

MeSH Terms

Abscess
Animals
Arthritis, Infectious
Death, Sudden
Encephalitis
Heart
Humans
Joints
Kidney
Microbial Sensitivity Tests
Multilocus Sequence Typing
Streptococcus*
Swine
Virulence
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