Surface properties of Streptococcus phocae strains isolated from diseased Atlantic salmon, Salmo salar L.

A. González-Contreras, B. Magariños, M. Godoy, R. Irgang, A. E. Toranzo, R. Avendaño-Herrera

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

23 Citas (Scopus)

Resumen

Streptococcus phocae is an emerging pathogen for Chilean Atlantic salmon, Salmo salar, but the factors determining its virulence are not yet elucidated. In this work, cell surface-related properties such as hydrophobicity and haemagglutination, adhesion to mucus and cell lines, capsule detection, survival and biofilm formation in skin mucus and serum resistance of the isolates responsible for outbreaks in Atlantic salmon and seals were examined. Adhesion to hydrocarbons and the results of salt aggregation tests indicated most of the S. phocae were strongly hydrophobic. All isolates exhibited a similar ability to attach to the Chinook salmon embryo (CHSE) cells line, but were not able to enter CHSE cells. Haemagglutination was not detected. Our data clearly indicate that S. phocae can resist the killing activity of mucus and serum and proliferate in them, which could be associated with the presence of a capsular layer around the cells. Pathogenicity studies using seal and fish isolates demonstrated mortality or pathological signs in fish injected only with the Atlantic salmon isolate. No mortalities or histopathological alterations were observed in fish injected with extracellular products.

Idioma originalInglés
Páginas (desde-hasta)203-215
Número de páginas13
PublicaciónJournal of Fish Diseases
Volumen34
N.º3
DOI
EstadoPublicada - mar 2011

Áreas temáticas de ASJC Scopus

  • Ciencias acuáticas
  • Veterinaria (miscelánea)

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