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First report of tetracycline-resistant Aeromonas veronii infection in Amur catfish (Silurus asotus) cultured in Korea

  • Kim, Hyo Yeon (Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Jun, Jin Woo (Department of Aquaculture, Korea National College of Agriculture and Fisheries) ;
  • Lim, Se Ra (Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Park, Seon Young (Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Han, Jee Eun (Laboratory of Aquatic Biomedicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Park, Se Chang (Laboratory of Aquatic Biomedicine, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University) ;
  • Kim, Ji Hyung (Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology)
  • Received : 2019.07.25
  • Accepted : 2019.10.04
  • Published : 2019.12.31

Abstract

Mass mortality in commercially cultured Amur catfish (Silurus asotus), showing symptoms of dermal ulcerations, occurred on a private farm in Mar 2019 in Korea. β-hemolytic bacteria were isolated from the ulcers and kidneys of the fish and identified as Aeromonas veronii. The isolate was resistant to tetracycline and possessed cytotoxic heat-labile enterotoxin (aerolysin/hemolysin). We investigated the genetic determinants associated with tetracycline resistance, and the isolate has been confirmed to simultaneously possess tetA and tetE genes. This is the first report on the occurrence of tetracycline-resistant A. veronii infection related to mass mortality in commercially cultured Amur catfish in Korea.

Acknowledgement

Supported by : KRIBB

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