Antigenic variability of Vibrio anguillarum serotype O2a: A hurdle for vaccine efficacy against vibriosis in rainbow trout (Oncorhynchus mykiss).

Despite vaccination, outbreaks of vibriosis still occur in sea-reared rainbow trout in Denmark. Vibriosis outbreaks are caused mainly by V. anguillarum serotypes O1 and O2a, and bacterins of both serotypes are included in the commonly used vaccine against this disease in Danish aquaculture.

Polar bear-adapted Ursidibacter maritimus are remarkably conserved after generations in captivity.

Most species in the bacterial family of Pasteurellaceae colonize one specific host species. Vertebrates of very different evolutionary descent including fish, turtles, marsupials, eutherians and birds are colonized by different members of Pasteurellaceae. This one-to-one microbial-host species partnership makes Pasteurellaceae species valuable candidates to study biodiversity, bacterial-host co-evolution and host adaptation, and their widespread distribution across vertebrates provide the possibility to collect a wide array of data, where wildlife species are essential.

Analysis of 44 Vibrio anguillarum genomes reveals high genetic diversity.

Vibriosis, a hemorrhagic septicemic disease caused by the bacterium , is an important bacterial infection in Danish sea-reared rainbow trout. Despite of vaccination, outbreaks still occur, likely because the vaccine is based on strains from abroad/other hosts than rainbow trout. Information about the genetic diversity of specifically in Danish rainbow trout, is required to investigate this claim.

OCCURRENCE OF PASTEURELLACEAE BACTERIA IN THE ORAL CAVITY OF SELECTED MARSUPIAL SPECIES.

Eighty-two Pasteurellaceae isolates from marsupials characterized by phylogenetic analysis of rpoB gene sequences formed five distinct groups. Twenty-one strains from long-nosed potoroos ( Potorous tridactylus apicalis), spotted-tailed quolls ( Dasyurus maculatus), and eastern quolls ( Dasyurus viverrinus) made up group 1, which classified with Frederiksenia canicola. Group 2, 15 strains from Tasmanian devils ( Sarcophilus harrisii), common wombats ( Vombatus ursinus), common ring-tailed possums ( Pseudocheirus peregrinus), and eastern quolls, grouped with Pasteurella multocida.

Testudinibacter aquarius gen. nov., sp. nov., a member of the family Pasteurellaceae isolated from the oral cavity of freshwater turtles.

A total of 13 Pasteurellaceae isolates from healthy freshwater turtles were characterized by genotypic and phenotypic tests. Phylogenetic analysis of partial 16S rRNA and rpoB gene sequences showed that the isolates investigated formed a monophyletic group. The closest related species based on 16S rRNA gene sequencing was Chelonobacter oris CCUG 55632T with 94.

Ursidibacter maritimus gen. nov., sp. nov. and Ursidibacter arcticus sp. nov., two new members of the family Pasteurellaceae isolated from the oral cavity of bears.

Thirty-three suspected strains of the family Pasteurellaceae isolated from the oral cavity of polar and brown bears were characterized by genotypic and phenotypic tests. Phylogenetic analysis of partial 16S rRNA gene and rpoB sequences showed that the investigated isolates formed two closely related monophyletic groups, representing two novel species of a new genus. Based on 16S rRNA gene sequence comparison Bibersteinia trehalosi was the closest related species with a validly published name, with 95.

OCCURRENCE OF PASTEURELLACEAE BACTERIA IN THE ORAL CAVITY OF THE TASMANIAN DEVIL (SARCOPHILUS HARRISII).

The occurrence of bacteria belonging to the family Pasteurellaceae in the oral cavity of captive Tasmanian devils (Sarcophilus harrisii) was investigated using phenotypic and subsequent genotypic characterization and phylogenetic analyses. A total of 62 bacterial isolates obtained from Tasmanian devils, tentatively classified with the family Pasteurellaceae, were further characterized by phylogenetic analysis of rpoB gene sequence similarity, which showed that the isolates investigated formed five distinct groups. A total of 15 strains formed a novel genus-like group within Pasteurellaceae.

Draft Genome Sequence of Chelonobacter oris Strain 1662T, Associated with Respiratory Disease in Hermann's Tortoises.

Chelonobacter oris 1662(T) is a type strain of the recently described species of the Pasteurellaceae family. The strain was isolated from the choanae of a captive tortoise with signs of respiratory tract infection. The genome reported here is approximately 2.

Bisgaardia miroungae sp. nov., a new member of the family Pasteurellaceae isolated from the oral cavity of northern elephant seals (Mirounga angustirostris), and emended description of the genus Bisgaardia.

A total of 17 bacterial isolates from northern elephant seals, tentatively classified within the family Pasteurellaceae, were further characterized by genotypic and phenotypic tests. Phylogenetic analysis of partial 16S rRNA and rpoB gene sequences showed that the isolates investigated formed a monophyletic group, closely related to the genus Bisgaardia within the family Pasteurellaceae. The rpoB gene sequence similarity was 97.

Otariodibacter oris and Bisgaardia genomospecies 1 isolated from infections in pinnipeds.

We document the first associations of two recently described species of Pasteurellaceae bacteria with lesions in wild pinnipeds in rehabilitation. Samples were collected from nine lesions in four California sea lions (Zalophus californianus) and two Pacific harbor seals (Phoca vitulina) during necropsy or admission examinations at a rehabilitation facility in northern California. Seven Pasteurellaceae isolates were identified using phenotypic tests and partial rpoB gene sequencing.

Occurrence of Pasteurellaceae bacteria in the oral cavity of selected marine mammal species.

The occurrence of bacteria belonging to Pasteurellaceae in the oral cavity of captive marine mammals was investigated using culture and subsequent geno- and phenotypic characterization and phylogenetic analyses. A total of 89 bacterial isolates from pinnipeds tentatively classified with the family Pasteurellaceae were further characterized by phylogenetic analysis of rpoB gene sequences, which showed that the isolates investigated formed five distinct groups. Four strains from California sea lions (Zalophus californianus) made up group I, which was classified with Pasteurella canis.

Otariodibacter oris gen. nov., sp. nov., a member of the family Pasteurellaceae isolated from the oral cavity of pinnipeds.

A total of 27 bacterial isolates from California sea lions and a walrus tentatively classified within the family Pasteurellaceae was further characterized by genotypic and phenotypic tests. Phylogenetic analysis of partial 16S rRNA and rpoB gene sequences showed that the isolates investigated formed a monophyletic group, tentatively designated Bisgaard taxon 57. According to 16S rRNA gene sequences, the most closely related species with a validly published name was Bisgaardia hudsonensis and the most closely related species based on rpoB sequence comparison was Pasteurella multocida subsp.