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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
卷 59, 期 -, 页码 2599-2604出版社
SOC GENERAL MICROBIOLOGY
DOI: 10.1099/ijs.0.006650-0
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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 1 6S 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)).
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