Journal
DISEASES OF AQUATIC ORGANISMS
Volume 67, Issue 3, Pages 209-215Publisher
INTER-RESEARCH
DOI: 10.3354/dao067209
Keywords
flat oyster; Vibrio; Vibrio neptunius; pathogenicity test; shellfish hatchery
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Shellfish hatcheries are often affected by disease outbreaks. Three such episodes were investigated in different Galician hatcheries in order to establish the relationship between present microbiota and mortalities. Isolates were obtained from various parts of the hatcheries. Experimental tests for pathogenicity were carried out in microscale experiments using selected strains on Ostrea edulis larvae. The pathogenicity of 1 strain from each outbreak was demonstrated and shown to cause high mortalities (ranging from 98.5 to 100 %) in 72 to 96 h after inoculation of larval cultures. All 3 strains belong to the genus Vibrio. One of the strains was identified as Vibrio neptunius and is the first description of this species as a molluscan pathogen. The other 2 strains showed low similarity with the Vibrio species analysed and may constitute new species within this genus.
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