Presence of virulent Edwardsiella tarda in farmed nile tilapia and striped catfish.

ABSTRACT: The production of striped catfish (Pangasianodon hypothalamus) has increased worldwide; recently, it was farmed with Nile tilapia in polyculture farms. Polyculture systems and water temperature (25℃ and 33℃) could affect Edwardsiella tarda infection, antibiotic efficacy, and residues. Moribund fishes were collected from three Farms 1-3: Farm 1 (monoculture, Nile tilapia), Farm 2 (monoculture, striped catfish), and Farm 3 (polyculture). Four E. tarda, LAMSH1, and LAMAH2-4 were isolated, whereas LAMAH3 was isolated from both fish spp., where striped catfish were highly susceptible to infection. The obtained E. tarda, which was isolated from striped catfish, has a significantly lower LD₅₀ than those retrieved from Nile tilapia, and co-infection occurred only in striped catfish on F

SUBMITTER: Okasha LA 

PROVIDER: S-EPMC12412243 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature