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Volume 9, Issue 2

outbreak caused by an emerging zoonotic strain with acquired multi-drug resistance in Thailand Open Access

Abstract

is an emerging zoonotic swine pathogen which can cause severe infections in humans. In March 2021, an outbreak of infections with 19 confirmed cases of septicemia and meningitis leading to two deaths, occurred in Nakhon Ratchasima province, Thailand. We characterized the outbreak through an epidemiological investigation combined with Illumina and Nanopore whole genome sequencing (WGS). The source of the outbreak was traced back to a raw pork dish prepared from a single pig during a Buddhist ceremony attended by 241 people. WGS analysis revealed that a single serotype 2 strain belonging to a novel sequence type (ST) of the emergent Thai zoonotic clade CC233/379, was responsible for the infections. The outbreak clone grouped together with other Thai zoonotic strains from CC233/379 and CC104 in a global phylogeny and capsule switching events between serotype 2 zoonotic strains and serotype 7 porcine strains were identified. The outbreak strain showed reduced susceptibility to penicillin corresponding with mutations in key residues in the penicillin binding proteins (PBPs). Furthermore, the outbreak strain was resistant to tetracycline, erythromycin, clindamycin, linezolid and chloramphenicol, having acquired an integrative and conjugative element (ICE) carrying resistance genes and as well as a transposon from the IS1216 family carrying and . This investigation demonstrates that multi-drug resistant zoonotic lineages of which pose a threat to human health continue to emerge.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): antimicrobial resistance , outbreak , Streptococcus suis , whole genome sequencing and zoonosis
Funding
This study was supported by the:
  • Health~Holland (Award LSHM19137)
    • Principle Award Recipient: ConstanceSchultsz
© 2023 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2023-02-15
2025-05-22
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Streptococcus suis outbreak caused by an emerging zoonotic strain with acquired multi-drug resistance in Thailand
M Gen 9, 000952 (2023); https://doi.org/10.1099/mgen.0.000952
/content/journal/mgen/10.1099/mgen.0.000952
/content/journal/mgen/10.1099/mgen.0.000952
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