alexa Genotypic diversity of Vibrio isolates associated with turbot (Scophthalmus maximus) culture.
Microbiology

Microbiology

Journal of Bacteriology & Parasitology

Author(s): Montes M, Farto R, Prez MJ, Armada SP, Nieto TP

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Abstract One hundred environmental strains of Vibrio isolated from seawater and skin of healthy turbot in an aquaculture system were analyzed. Chromosomal DNA was digested with HindIII and MluI, and hybridized using a digoxigenin-labeled probe complementary to 16S and 23S rRNA of Escherichia coli. Nineteen riboclusters were defined by ribotyping analysis at a value of SD> or = 70\%, using the Dice coefficient (S(D)) and UPGMA. The phylogenetic position of each ribocluster was achieved by 16S rRNA gene sequencing of representative isolates. Both techniques were necessary and useful for identifying the isolates. V. parahaemolyticus, V. scophthalmi, V. splendidus-V. lentus related group, V. halioticoli, V. fischeri and V. ichthyoenteri were identified and clustered separately. Their ribocluster diversity was studied. Throughout the year, ribotypic profiles of corresponding strains isolated from both seawater and turbot skin appeared, indicating that environmental strains can easily colonize turbot. No correspondence between riboclusters and the season of isolation was found. Some ribotypes had been found in previous studies, demonstrating that ribotyping is a useful tool for monitoring environmental isolates and to finding strains that can colonize aquatic organisms and are able to produce outbreaks. The ribotype schemes defined here can be used as a ribotype database of environmental isolates of these species. This article was published in Res Microbiol and referenced in Journal of Bacteriology & Parasitology

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