FN Archimer Export Format PT J TI Molecular and phenotypic characterization of Vibrio aestuarianus subsp francensis subsp nov., a pathogen of the oyster Crassostrea gigas BT AF GARNIER, Matthieu LABREUCHE, Yannick NICOLAS, Jean-Louis AS 1:1;2:1;3:1; FF 1:PDG-DOP-DCB-PFOM-PI;2:PDG-DOP-DCOP-LEADNC-LAC;3:PDG-DOP-DCB-PFOM-PI; C1 IFREMER, Ctr Brest, Lab Physiol Invertebres, PFOM,UMR PE2M, F-29280 Plouzane, France. C2 IFREMER, FRANCE SI BREST SAINT VINCENT SE PDG-DOP-DCB-PFOM-PI PDG-DOP-DCOP-LEADNC-LAC IN WOS Ifremer jusqu'en 2018 IF 2.582 TC 54 UR https://archimer.ifremer.fr/doc/2008/publication-4961.pdf LA English DT Article DE ;Polyphasic approach;Summer mortalities;Crassostrea gigas;Pathogen;French isolates;Vibrio aestuarianus AB Eleven Vibrio isolates invading the hemolymph of live and moribund oysters (Crassostrea gigas) collected in the field and from a hatchery in France, were characterized by a polyphasic approach. Phylogenetic analysis of 16S rRNA, gyrB and toxR genes indicated high homogeneity between these strains and the Vibrio aestuarianus type strain (ATCC35048(T)), and confirmed previous 16S rRNA analysis. In contrast, DNA:DNA hybridization was from 61% to 100%, while phenotypic characters and virulence tests showed a large diversity between the strains. Nevertheless, several common characters allowed the isolates to be distinguished from the reference strain. On the basis of several distinct phenotypic characteristics, it is proposed to establish two subspecies within the V. aestuarianus spp. group, V. aestuarianus subsp. aestuarianus [D. Tison, R. Seidler, Vibrio aestuarianus: a new species from estuarine waters and shellfish, Int. J. Syst. Bacteriol. (1983) 699-702] and V. aestuarianus subsp. francensis for these French isolates. The characters that differentiate the new strains from V. aestuarianus subsp. aestuarianus(T) are virulence (positive for 63% of the isolates) and 12:0 fatty acid content. The colonies were smaller and uncoloured, whereas no growth occurred at 35 degrees C or on TCBS, and the strains did not utilize several substrates, including L-serine, alpha-cyclodextrin, D-mannitol, alpha-glycyl-L-aspartic acid, L-threonine and glucose-1-phosphate. (c) 2008 Elsevier GmbH. All rights reserved. PY 2008 PD OCT SO Systematic and Applied Microbiology SN 0723-2020 PU Elsevier VL 31 IS 5 UT 000260580900004 BP 358 EP 365 DI 10.1016/j.syapm.2008.06.003 ID 4961 ER EF