Methicillin-Resistant Clonal Complex 398 as a Major MRSA Lineage in Dogs and Cats in Thailand.

Surawit Chueahiran, Jitrapa Yindee, Pongthai Boonkham, Nipattra Suanpairintr, Pattrarat Chanchaithong
Author Information
  1. Surawit Chueahiran: Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand. ORCID
  2. Jitrapa Yindee: Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand.
  3. Pongthai Boonkham: Veterinary Diagnostic Laboratory, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand.
  4. Nipattra Suanpairintr: Department of Pharmacology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand.
  5. Pattrarat Chanchaithong: Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand. ORCID

Abstract

The aim of this study was to present molecular and antimicrobial resistance characteristics of methicillin-resistant (MRSA) clonal complex (CC) 398 isolated from diseased dogs and cats in Thailand. A total of 20 MRSA isolates of 134 isolated from canine and feline clinical samples during 2017-2020 were CC398, consisting of sequence type (ST) 398 (18 isolates), ST5926 (1 isolate), and ST6563 (1 isolate) by multilocus sequence typing. t034 and staphylococcal cassette chromosome (SCC) V were predominantly associated with ST398. Intraclonal differentiation was present by additional (t1255, t4653), non-detectable , composite SCC with a hybrid of + and class A complex, and DNA fingerprints by pulsed-field gel electrophoresis. The isolates essentially carried antimicrobial resistance genes, mediating multiple resistance to β-lactams (, ), tetracyclines [(M)], aminoglycosides [], and trimethoprim (). Livestock-associated MRSA ST398 resistance genes including (B), (E), , , and (L) were heterogeneously found and lost in subpopulation, with the absence or presence of additional (A), (B), and genes that corresponded to resistance phenotypes. As only a single CC398 was detected with the presence of intraclonal variation, CC398 seems to be the successful MRSA clone colonizing in small animals as a pet-associated MRSA in Thailand.

Keywords

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Grants

  1. 4/2561/Chulalongkorn University-Veterinary Science Research Fund
  2. no grant number/Chulalongkorn Academic Advancement into Its 2nd Century Project

Word Cloud

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