Vibrio gigantis sp nov., isolated from the haemolymph of cultured oysters (Crassostrea gigas)

• Published in: International Journal of Systematic and Evolutionary Microbiology
• Main Authors: Le Roux, Frederique, Goubet, A, Thompson, F, Faury, Nicole, Gay, Melanie, Swings, J, Saulnier, Denis
• Format: Article in Journal/Newspaper
• Language: English
• Published: Society for General Microbiology 2005
• Subjects: Vibrio gigantis; Haemoplymph; Disease; Crassostrea gigas; Oyster culture
• Online Access: https://archimer.ifremer.fr/doc/2005/publication-792.pdf; https://doi.org/10.1099/ijs.0.63666-0; https://archimer.ifremer.fr/doc/00000/792/

Polyphasic analysis of four new Vibrio isolates originating from the haemolymph of diseased cultured oysters is described. The new isolates were closely related to Vibrio splendidus, having 98 % 16S rRNA gene sequence similarity. Phylogenetic analysis based on DNA gyrase subunit B (gyrB), RNA polymerase Quo factor (rpoD), replication origin-binding protein (rctB) and transmembrane regulatory protein (toxR) genes, fluorescent amplified fragment length polymorphism and DNA-DNA hybridization experiments clearly showed that the new isolates form a tight genomic group that is different from the currently known Vibrio species. It is proposed that these new isolates should be accommodated in a novel species, Vibrio gigantis sp. nov. Phenotypic features that differentiate V. gigantis from other known Vibrio species include arginine dihydrolase, gelatinase and beta-galactosidase activities, NO2 production, growth at 35 degrees C, and utilization of sucrose, melibiose, amygdalin, glycerol, galactose, starch and glycogen. The type strain is LGP 13(T) (=LMG 22741(T)=CIP 108656(T)).