- Volume 47, Issue 4, 1997
Volume 47, Issue 4, 1997
- Original Papers Relating To Systematic Bacteriology
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Phylogenetic Relationships of Salmonella typhi and Salmonella typhimurium Based on 16S rRNA Sequence Analysis
More LessThe 16S rRNA gene sequences of Salmonella typhi and Salmonella typhimurium were amplified by PCR, cloned, and sequenced. These sequences were analyzed by comparison with reference organisms from the family Enterobacteriaceae. Both S. typhi and S. typhimurium belong to the gamma subdivision of the class Proteobacteria.
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Reassessment of the Taxonomic Position of Rickettsiella grylli
V. Roux, M. Bergoin, N. Lamaze and D. RaoultWe determined the 16S rRNA gene sequence of Rickettsiella grylli, an intracellular parasite of Gryllus bimaculatus and related species of crickets. Phylogenetic inferences made from alignment of this sequence with the sequences of other bacteria demonstrated that R. grylli is most closely related to Coxiella burnetii and Legionella species in the γ subclass of the phylum Proteobacteria. R. grylli was previously thought to be related to members of the order Rickettsiales, but the representatives of this order have been shown to be members of the α1 subclass of the Proteobacteria. Our results indicate that R. grylli should be removed from the order Rickettsiales.
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Isolation of an Aceticlastic Strain of Methanosarcina siciliae from Marine Canyon Sediments and Emendation of the Species Description for Methanosarcina siciliae
More LessA newly described strain of the genus Methanosarcina was isolated from submarine canyon sediments and is shown by comparative sequence analyses of 16S ribosomal DNA and the gene encoding methyl coenzyme M reductase, mcrI, to be a strain of Methanosarcina siciliae. Morphological and physiological characteristics are described. In contrast to the two previously described strains that grow exclusively on methanol, methylamines, and dimethylsulfide, M. siciliae C2J is also capable of growth on and methanogenesis from acetate. We propose that the species description for M. siciliae be amended to include aceticlastic strains.
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Desulfuromonas chloroethenica sp. nov. Uses Tetrachloroethylene and Trichloroethylene as Electron Acceptors
More LessStrain TT4B, isolated from freshwater sediments contaminated with chlorinated ethylenes, is described as Desulfuromonas chloroethenica sp. nov. This organism grows with acetate or pyruvate as electron donors and tetrachloroethylene, trichloroethylene, fumarate, polysulfide, and Fe(III) nitriloacetate as electron acceptors. D. chloroethenica is unique among the desulfuromonads in using chloroethylenes as electron acceptors. It is phenotypically and phylogenetically most closely related to Desulfuromonas acetexigens and shares many other features with this species.
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Another View on the Role of Photosynthetic Pigments in Taxonomy of Oxygenic-Phototrophic Bacteria: Proposed Rejection of the Order Prochlorales Florenzano, Balloni, and Materassi 1986 (Emend. Burger-Wiersma, Stal, and Mur 1989), the Family Prochloraceae Florenzano, Balloni, and Materassi 1986, and the Family Prochlorotrichaceae Burger-Wiersma, Stal, and Mur 1989
More LessWe propose that the order Prochlorales Florenzano, Balloni, and Materassi 1986 (emend. Burger-Wiersma, Stal, and Mur 1989), the family Prochloraceae Florenzano, Balloni, and Materassi 1986, and the family Prochlorotrichaceae Burger-Wiersma, Stal, and Mur 1989, validly published in the International Journal of Systematic Bacteriology under the rules of the Bacteriological Code, be rejected because of the imperfection of ordinal diagnosis. The oxygenic-phototrophic prokaryotes involved are proposed to be incorporated under their validly published names into the orders Chroococcales and Oscillatoriales of the “Cyanobacteria” group. Correspondingly, the latter is proposed to be upgraded to equal “Oxygenic photosynthetic bacteria” (Section 19 in Bergey’s Manual).
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PCR-Restriction Fragment Length Polymorphism Analysis of Genes Coding for 16S rRNA in Veillonella spp.
More LessRestriction fragment length polymorphism analysis of PCR-amplified 16S ribosomal DNA (16S rDNA PCR-RFLP) was used to generate restriction profiles of the American Type Culture Collection type strains of the genus Veillonella, i.e., V. atypica, V. caviae, V. criceti, V. dispar, V. parvula, V. ratti, and V. rodentium. Whole-cell protein profiles were obtained by sodium dodecyl sulfate-polyacrylamide gel electrophoresis for comparative purposes. The 16S rRNA genes were amplified by PCR, and RFLP analysis of the 16S rDNA was performed with MnlI and Sau3AI.MnlI produced six RFLP patterns for seven type strains, since the patterns for V. atypica and V. caviae were the same. RFLP patterns with Sau3AI could distinguish between V. atypica and V. caviae. The type strains of Veillonella species were easily distinguished by 16S rDNA PCR-RFLP.
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- Original Papers Relating To The Systematics Of Yeasts
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Reexamination of Yeast Strains Classified as Torulaspora delbrueckii (Lindner)
More LessTwenty-eight yeast strains presumed to represent Torulaspora delbrueckii were analyzed by randomly amplified polymorphic DNA-PCR analysis. Four strains (HUT 7161, IFO 1138, IFO 1145, and IFO 1956) that were considerably different from the type strain were further investigated. Morphological and physiological characteristics revealed that strains HUT 7161 and IFO 1145 belong to the genus Debaryomyces rather than the genus Torulaspora, and the former strain may represent Debaryomyces hansenii. Strains IFO 1138 and IFO 1956 were classified as either Saccharomyces castellii or Saccharomyces dairensis by identification keys involving physiological tests. On the basis of analysis of the sequences of two rRNA internal spacer regions, strains IFO 1138 and IFO 1956 were closely related to S. castellii and strains HUT 7161 and IFO 1145 were outside members of the genera Torulaspora, Zygosaccharomyces, and Saccharomyces.
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- Matters Relating To The International Committee On Systematic Bacteriology
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Corrigenda to the Approved Lists of Bacterial Names and to the Amended Edition of the Approved Lists of Bacterial Names
More LessThis paper contains corrections to the Approved Lists of Bacterial Names and to the amended edition of the Approved Lists of Bacterial Names.
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- Letters To The Editor
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