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    Título
    Adhesion to brown trout skin mucus, antagonism against cyst adhesion and pathogenicity to rainbow trout of some inhibitory bacteria against Saprolegnia parasitica
    Autor
    Carbajal González, María Teresa
    Fregeneda Grandes, Juan MiguelAutoridad Buleria ORCID
    González Palacios, Concepción
    Aller Gancedo, José MiguelAutoridad Buleria ORCID
    Facultad/Centro
    Facultad de Veterinaria
    Área de conocimiento
    Sanidad Animal
    Datos de la obra
    Diseases of aquatic organisms, 2013, vol. 104, n. 1
    Editor
    Inter-Research
    Fecha
    2013-04-29
    Descripción física
    P. 35-44
    Abstract
    Biological control of saprolegniosis with bacteria might be an alternative to the use of chemical compounds. Among criteria for the selection of such bacteria are their absence of pathogenicity to fish and their ability to prevent adhesion of the pathogen to the skin mucus. The pathogenicity to rainbow trout of 21 bacterial isolates with in vitro inhibitory activity against Saprolegnia parasitica was studied. Fifteen of the isolates, identified as Aeromonas sobria, Pantoea agglomerans, Pseudomonas fluorescens, Serratia fonticola, Xanthomonas retroflexus and Yersinia kristensenii, were non-pathogenic when injected into rainbow trout. Their capacity to adhere to the skin mucus of male and female brown trout and to reduce the adhesion of S. parasitica cysts under exclusion, competition and displacement conditions was tested. The 15 bacterial isolates showed a low adhesion rate, ranging between 1.7% (for an A. sobria isolate) and 15.3% (a P. fluorescens isolate). This adhesion was greater in the case of mucus from male brown trout than from females. Similarities in the adhesion to male mucus and other substrates and correlation to that observed to polystyrene suggest that adhesion to skin mucus does not depend on the substrate. A high percentage (88.9%) of the S. parasitica cysts adhered to the skin mucus of male brown trout. Almost all of the bacteria reduced this adhesion ratio significantly under exclusion and competition conditions. However, only half of the isolates displaced cysts from skin mucus, and more bacterial cells were necessary for this effect. A novel method to study the adhesion of S. parasitica cysts to skin mucus of trout and their interactions with inhibitory bacteria is described.
    Materia
    Sanidad animal
    Veterinaria
    Zoología
    Palabras clave
    Truchas
    Saprolegnia parasítica
    Flora cutánea
    Idioma
    eng
    Tipo documental
    info:eu-repo/semantics/article
    Peer review
    SI
    URI
    http://hdl.handle.net/10612/9280
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    • Artículos de revista (post-print) [2172]
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