title: Arcobacter thereius sp. nov., isolated from pigs and ducks.
abstract: During a Danish study on the prevalence of campylobacteria in pig abortions and food of animal origin, eight Gram-negative, slightly curved, rod-shaped, non-spore-forming bacteria were clustered by using amplified fragment length polymorphism analysis in a distinct phenon within the genus Arcobacter. In the present study, numerical analysis of whole-cell protein profiles also showed that all isolates clustered in a single group distinct from other recognized Arcobacter species. DNA-DNA hybridization among two representative strains exhibited a mean DNA-DNA relatedness value of 79 %. DNA-DNA hybridization with the type strains of recognized Arcobacter species revealed levels of DNA-DNA relatedness of 41 % or less. The DNA G+C content of the type strain was 28.5 mol%. Pairwise comparison of the 16S rRNA gene sequences with those of the type strains of established species identified Arcobacter cryaerophilus (97.9 %), Arcobacter cibarius (97.5 %) and Arcobacter skirrowii (97.2 %) as the nearest phylogenetic neighbours. The isolates could be distinguished from other Arcobacter species by means of the following biochemical tests: activities of catalase and urease, reduction of nitrate and growth on minimal medium, lack of growth at 37 degrees C under standardized aerobic and microaerobic conditions, in 4 % NaCl and 1 % glycine media. Finally, DNA fingerprints obtained by using enterobacterial repetitive intergenic consenus-PCR showed that the eight isolates represent eight strains of a single novel Arcobacter species, for which the name Arcobacter thereius sp. nov. is proposed. The type strain is LMG 24486(T) (=CCUG 56902(T)).
authors.affiliation: Department of Veterinary Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium. kurt.houf@UGent.be
authors.forename: Kurt
authors.initials: K
authors.lastname: Houf
authors.forename: Stephen L W
authors.initials: SL
authors.lastname: On
authors.forename: Tom
authors.initials: T
authors.lastname: Coenye
authors.forename: Lies
authors.initials: L
authors.lastname: Debruyne
authors.forename: Sarah
authors.initials: S
authors.lastname: De Smet
authors.forename: Peter
authors.initials: P
authors.lastname: Vandamme
mesh_terms: D000818:Animals; D020640:Arcobacter / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D001482:Base Composition; D002988:Cloaca / Q000382:microbiology; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D004372:Ducks / Q000382:microbiology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013552:Swine / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S