Edwardsiella piscicida: A versatile emerging pathogen of fish

Ka Yin Leung*, Qiyao Wang, Zhiyun Yang, Bupe A. Siame

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

87 Scopus citations


Edwardsiella piscicida is an Enterobacteriaceae that is abundant in water and causes food and waterborne infections in fish, animals, and humans. The bacterium causes Edwardsiellosis in farmed fish and can lead to severe economic losses in aquaculture worldwide. E. piscicida is an intracellular pathogen that can also cause systemic infection. Type III and type VI secretion systems are the bacterium’s most lethal weapons against host defenses. It also possesses multi-antibiotic resistant genes and is selected and enriched in the environment due to the overuse of antibiotics. Therefore, the bacterium has great potential to contribute to the evolution of the resistome. All these properties have made this bacterium a perfect model to study bacteria virulence mechanisms and the spread of antimicrobial genes in the environment. We summarize recent advance in E. piscicida biology and provide insights into future research in virulence mechanisms, vaccine development and novel therapeutics.

Original languageEnglish
Pages (from-to)555-567
Number of pages13
Issue number1
StatePublished - 1 Jan 2019


  • Edwardsiella piscicida
  • T3SS/T6SS and effectors
  • intracellular and systemic infection
  • resistome
  • virulence mechanisms


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