1 Aeromonas bivalvium sp. nov., a novel species isolated from bivalve molluscs. 2 3 David Miñana-Galbis, Maribel Farfán, M. Carme Fusté and J. Gaspar Lorén* 4 5 Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de 6 Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain. 7 8 *Corresponding author: 9 Dr. J. Gaspar Lorén. 10 Tel.: 34 93 402 44 97. 11 Fax: 34 93 402 44 98. 12 e-mail:
[email protected] 13 14 Running title: 15 Aeromonas bivalvium sp. nov. 16 17 Subject category: 18 New Taxa (subsection Proteobacteria). 19 20 Abbreviations: 21 AD, m-Aeromonas selective agar base Havelaar; ADH, arginine dehydrolase; BCCMTM/LMG, Belgian 22 Coordinated Collections of Microorganisms / Laboratorium voor Microbiologie from Universiteit Gent; 23 bv., biovar; CECT, Spanish Type Culture Collection from Universitat de València; FAFLP, fluorescent 24 amplified fragment length polymorphism; HG, hybridization group; LDC, lysine decarboxylase; MR, 25 methyl red; O/129, 2,4-diamino-6,7-diisopropylpteridine; ODC, ornithine decarboxylase; TSA, tryptone 26 soy agar; VP, Voges-Proskauer. 27 28 Footnote: 29 The GenBank accession numbers for the 16S rDNA sequences of strains 868ET and 665N are 30 DQ504429 and DQ504430, respectively. 31 32 SUMMARY 33 34 A polyphasic study was performed to determine the taxonomic position of two Aeromonas strains, 35 665N and 868ET, isolated from bivalve molluscs that could not be identified at species level in a 36 previous numerical taxonomy study. The DNA G+C content of these isolates ranged from 62·3 to 62·6 37 mol%. Sequence analysis of the 16S rRNA gene showed that both strains were closely related to 38 members of the genus Aeromonas.