Bacterial skin flora variation and in vitro inhibitory activity against Saprolegnia parasitica in brown and rainbow trout

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Bacterial skin flora variation and in vitro inhibitory activity against Saprolegnia parasitica in brown and rainbow trout

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dc.contributor Facultad de Veterinaria es_ES
dc.contributor.author Fregeneda Grandes, Juan Miguel
dc.contributor.author Carbajal González, María Teresa
dc.contributor.author Suárez Ramos, Pilar Susana
dc.contributor.author Rodríguez Cadenas, Fausto
dc.contributor.author Aller Gancedo, José Miguel
dc.contributor.other Sanidad Animal es_ES
dc.date 2011-09-09
dc.date.accessioned 2018-12-24T18:06:53Z
dc.date.available 2018-12-24T18:06:53Z
dc.date.issued 2018-12-24
dc.identifier.citation Diseases of aquatic organisms, 2011, vol. 96, n. 2 es_ES
dc.identifier.uri http://hdl.handle.net/10612/9203
dc.description P. 126-135 es_ES
dc.description.abstract Variations in the number and diversity of bacteria from the skin of brown trout Salmo trutta L. and rainbow trout Oncorhynchus mykiss Walbaum were surveyed from different rivers and fish farms in northern Spain. In addition to determining bacterial populations in skin samples of healthy fish, bacterial populations were determined from skin lesions (of brown trout only) infected with Saprolegnia parasitica, the causal agent of saprolegniosis. Mean bacterial counts from skin lesions of brown trout suffering from saprolegniosis were nearly 1000 times greater than from the skin of uninfected brown and rainbow trout. More than 20 different genera of bacteria were identified, with isolates of Aeromonas and Iodobacter being the predominant genera associated with saprolegniosis lesions. The in vitro inhibitory activity of 72 of these skin isolates was tested against S. parasitica using 3 different assays. These included (1) assessing the inhibition by bacteria of colony growth on agar media, (2) the inhibition of colony growth from colonized hemp seeds in liquid media and (3) the inhibition of cyst germination in liquid media. Finally, the fungicidal effect of the 24 most inhibitory bacterial species, and the inhibitory activity of their culture supernatants, was tested in the same way. Isolates identified as Aeromonas piscicola, A. sobria, Pantoea agglomerans and Pseudomonas fluorescens achieved the highest inhibition against S. parasitica. Many of these inhibitory isolates were obtained primarily from skin lesions of fish with saprolegniosis. It is suggested that some of these isolates might be useful in the biological control of saprolegniosis. es_ES
dc.language eng es_ES
dc.publisher Inter-Research es_ES
dc.subject Inmunología es_ES
dc.subject Sanidad animal es_ES
dc.subject Zoología es_ES
dc.subject.other Saprolegnia parasítica es_ES
dc.subject.other Truchas es_ES
dc.subject.other Bacterias es_ES
dc.title Bacterial skin flora variation and in vitro inhibitory activity against Saprolegnia parasitica in brown and rainbow trout es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.description.peerreviewed SI es_ES

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