Bacterial isolates were obtained from mortality events affecting Mytilus edulis and reported by professionals in 2010-2013 or from mussel microflora. Experimental infections allowed the selection of two isolates affiliated to Vibrio splendidus/Vibrio hemicentroti type strains: a virulent 10/068 1T1 (76.6% and 90% mortalities in 24 h and 96 h) and an innocuous 12/056 M24T1 (0% and 23.3% in 24 h ...

Bacteria face a trade-off between genetic fidelity, which reduces deleterious mistakes in the genome, and genetic innovation, which allows organisms to adapt. Evidence suggests that many bacteria balance this trade-off by modulating their mutation rates, but few mechanisms have been described for such modulation. Following experimental evolution and whole-genome resequencing of the marine bacte...

Ulcer diseases are a recalcitrant issue at Atlantic salmon (Salmo salar) aquaculture cage-sites across the North region. Classical ulcerative outbreaks (also called winter ulcer disease) refer to skin infection caused by Moritella viscosa. However, several bacterial species frequently isolated from disease events, and it is unclear if other undescribed pathogens implicated in salmon. Although d...

There is current interest in biological sources of acetone, a volatile organic compound that impacts atmospheric chemistry. Here, we determined that leucine-dependent acetone formation is widespread in the Vibrionaceae. Sixteen Vibrio isolates, two Listonella species, and two Photobacterium angustum isolates produced acetone in the presence of L-leucine. Shewanella isolates produced much less a...

larities. A comparison between the TPqnrS-1a-associated QnrS1 protein and the 218-amino-acid proteins from Vibrio splendidus (accession no. EAP95542) and Vibrio spp. (accession no. EAQ55748)—the latter two considered as a natural reservoir of qnrS genes—revealed 83% and 82% amino acid identity, respectively, and 91% amino acid similarity. Previous studies revealed that the qnrS1 gene is often l...

Two species of Geotrupidae, Geotrupes splendidus splendidus (Fabricius) and Odonteus liebecki (Wallis), are newly reported for New Brunswick, Canada. Twelve species of Scarabaeidae are added to the faunal list of the province, including Aegialia criddlei Brown, Caelius humeralis (Brown), Dialytellus dialytoides (Fall), Diapterna omissa (LeConte), Diapterna pinguis (Haldeman), Planolinoides aeni...

The relative abundance of bacteria in the mucus and crushed tissue of the Mediterranean coral Oculina patagonica was determined by analyses of the 16S rRNA genes of isolated colonies and from a 16S rRNA clone library of extracted DNA. By SYBR gold staining, the numbers of bacteria in mucus and tissue samples were 6.2 x 10(7) and 8.3 x 10(8)/cm2 of coral surface, respectively, 99.8% of which fai...

A basic understanding of abundance and diversity of antibiotic-resistant microbes and their genetic determinants is necessary for finding a way to prevent and control the spread of antibiotic resistance. For this purpose, chloramphenicol and multiple antibiotic-resistant bacteria were screened from a mariculture farm in northern China. Both sea cucumber and sea urchin rearing ponds were populat...