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Isolation, identification and virulence gene characterization of Aeromonas dhakensis isolated from sea lion (Zalophus californianus).
Jin, S; Guan, T; Hu, M; Li, W; Liu, Y.
Affiliation
  • Jin S; College of Veterinary Medicine, Northeast Agricultural University, Harbin, P. R. China.
  • Guan T; College of Veterinary Medicine, Northeast Agricultural University, Harbin, P. R. China.
  • Hu M; College of Veterinary Medicine, Northeast Agricultural University, Harbin, P. R. China.
  • Li W; College of Veterinary Medicine, Northeast Agricultural University, Harbin, P. R. China.
  • Liu Y; College of Veterinary Medicine, Northeast Agricultural University, Harbin, P. R. China.
Lett Appl Microbiol ; 74(6): 932-940, 2022 Jun.
Article in En | MEDLINE | ID: mdl-35239198
ABSTRACT
Species of Aeromonas are ubiquitous pathogens of fish and aquatic animals and can infect humans and other animals through the food chain. However, there are few reports of marine mammalian infections. In 2020, a sea lion (Zalophus californianus) died acutely at an aquarium in Harbin, Heilongjiang Province, China. In order to explore the cause of death, we dissected the animal and observed pathological changes. Ogans were aseptically collected and used for bacterial isolation and culture. This revealed that the sea lion had died of sepsis caused by a bacterial infection. Isolated bacteria were investigated by morphology, biochemical phenotype and molecular identification, and this determined the pathogen as A. dhakensis. The isolate contained six virulence genes, hlyA, aerA, act, lafA, ela, fla, and was susceptible to most antibiotics. This is the first report of A. dhakensis associated with septicaemia in pinnipeds and a description of its virulence and resistance profiles. Its presence in aquatic environments poses a potential threat to marine mammals.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Gram-Negative Bacterial Infections / Sepsis / Aeromonas / Sea Lions Type of study: Diagnostic_studies Limits: Animals Language: En Journal: Lett Appl Microbiol Year: 2022 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Gram-Negative Bacterial Infections / Sepsis / Aeromonas / Sea Lions Type of study: Diagnostic_studies Limits: Animals Language: En Journal: Lett Appl Microbiol Year: 2022 Document type: Article