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Volume 35,
Issue 4,
1985
Volume 35, Issue 4, 1985
- Original Papers Relating To Systematic Bacteriology
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NOTES: Methanosarcina thermophila sp. nov., a Thermophilic, Acetotrophic, Methane-Producing Bacterium
More LessMethanosarcina thermophila is proposed as a new species name for the thermophilic, acetotrophic, methanogenic bacterum previously designated Methanosarcina sp. strain TM-1, and a formal species description is provided.
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Ehrlichia risticii sp. nov.: Etiological Agent of Equine Monocytic Ehrlichiosis (Synonym, Potomac Horse Fever)
More LessThe etiological agent of equine monocytic ehrlichiosis (synonym, Potomac horse fever) was isolated and propagated in vitro by using techniques similar to those established for some members of the genus Ehrlichia. The organisms, which are contained within a cytoplasmic vacuole, are intermediate in size between Ehrlichia canis and Ehrlichia sennetsu, ranging from 0.4 to 0.75 μm wide and from 0.5 to 1.5 μm long. The agent is antigenically related to E. sennetsu and E. canis but also possesses unique antigenic determinants, thereby distinguishing it as a new species of the genus Ehrlichia. The name Ehrlichia risticii is proposed for this new agent. The type strain is strain HRC-IL (= ATCC VR-986).
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Guanine-Plus-Cytosine Compositions of and Deoxyribonucleic Acid Hybridization Comparisons between Mycoplasma hyopneumoniae and Mycoplasma flocculare
More LessAmong the mycoplasmal species commonly isolated from porcine lungs are Mycoplasma hyopneumoniae and Mycoplasma flocculare. The former organism is a proven agent of enzootic porcine pneumonia, whereas the latter organism is of little or no pathogenicity. These mycoplasmas show considerable antigenic cross-reactivity. The deoxyribonucleic acids of M. hyopneumoniae strain 11 and M. flocculare strain Ms42T (T = type strain) each had a guanine-plus-cytosine content of 33 mol%. We also determined the extent of deoxyribonucleic acid sequence homology as reflected in deoxyribonucleic acid-deoxyribonucleic acid hybridization values. Approximately 10% heterologous hybridization was observed. Thus, our data support the previous classification of these organisms as separate species within the genus Mycoplasma.
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Monoclonal Antibody for an Outer Membrane Lipoprotein of the Pseudomonas fluorescens Group of the Family Pseudomonadaceae
More LessMonoclonal antibody MAI-6 directed against Pseudomonas aeruginosa strain PAO1 outer membrane lipoprotein H2 also interacted with a protein having an identical molecular weight from 50 of 52 strains of P. aeruginosa tested. This antibody interacted with the P. fluorescens group of the family Pseudomonadaceae and with Azotobacter vinelandii but not with several other species of gram-negative bacteria. A colony blotting assay performed with this antibody allowed rapid detection of the P. fluorescens-A. vinelandii group.
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Guanine-Plus-Cytosine Content of Rothia dentocariosa
More LessThe guanine-plus-cytosine contents of Rothia dentocariosa strains ATCC 17931T (T = type strain) and ATCC 19426 were determined by thermal denaturation and found to be 54 and 57 mol%, respectively. These values are lower than the values given in many publications, but are consistent with data cited in some other references.
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- Original Papers Relating To The Systematics Of Yeasts
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Resolution of the Varietal Relationship within the Species Pichia opuntiae and Establishment of a New Species, Pichia thermotolerans comb. nov.
More LessThe varietal relationship within the species Pichia opuntiae was determined by a study of deoxyribonucleic acid relatedness and by a comparison of the electrophoretic mobilities of 12 metabolic enzymes. The nuclear genomes of P . opuntiae var. opuntiae and P . opuntiae var. thermotolerans showed about 28% relative binding to hydroxylapatite in intervarietal deoxyribonucleic acid reassociation experiments, and the allozymes encoded by eight loci were different in the two taxa. Based on these molecular criteria, as well as allopatry, different host plants, and weak sexual interaction, P . opuntiae var. thermotolerans is raised to the rank of species as Pichia thermotolerans (Starmer et al.) Holzschu et al. comb. nov.
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Assessment of Intraspecific Variation in Clavispora sp. by Restriction Mapping of Tandemly Repeated Deoxyribonucleic Acid
The total deoxyribonucleic acids from 10 strains of an undescribed cactophilic species of Clavispora were subjected to restriction analyses with endonucleases ApaI, EcoRI, KpnI, and XholI. A 7.6-kilobase tandemly repeated segment of the genome was mapped and found to possess both conserved regions and variable regions among the strains examined. A total of eight possible endonuclease recognition sites were identified. Two strains were heterogeneous, and one of these shared one of its restriction maps with three other strains. In one instance, variation was correlated with a habitat difference. In addition, all strains possessed very large (up to 28-kilobase) repetitive EcoRI fragments. Preliminary results indicate that this yeast species shares parts of its conserved region with Clavispora lusitaniae, but that there are major differences between the two species in their variable regions. The use of restriction mapping in taxonomic and other investigations of yeasts is discussed.
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Deoxyribonucleic Acid Relatedness among Species of the Genus Saccharomyces Sensu Stricto
More LessTwenty-four species assigned to the genus Saccharomyces sensu stricto were examined for deoxyribonucleic acid relatedness. Results with type strains demonstrated the presence of four distinct species: S. cerevisiae, S. bayanus, S . carlsbergensis, and S . kluyveri. S . carlsbergensis NRRL Y-12693T showed intermediate relatedness between S . cerevisiae and S . bayanus and has a genome size approximately 1.5 times those of the last two species. These data suggest S . carlsbergensis to be a partial amphidiploid which may have arisen from natural hybridization between S. cerevisiae and S . bayanus.
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- Matters Relating To The International Committee On Systematic Bacteriology
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Opinion 58: Confirmation of the Types in the Approved Lists as Nomenclatural Types including Recognition of Nocardia asteroides (Eppinger 1891) Blanchard 1896 and Pasteurella multocida (Lehmann and Neumann 1899) Rosenbusch and Merchant 1939 as the Respective Type Species of the Genera Nocardia and Pasteurella and Rejection of the Species Name Pasteurella gallicida (Burrill 1883) Buchanan 1925: Judicial Commission of the International Committee on Systematic Bacteriology
The Judicial Commission has formally and explicitly ruled that the nomenclatural types cited in the Approved Lists are the correct types unless later varied by the Commission under its powers. The type species of Nocardia becomes Nocardia asteroides and the type species of Pasteurella becomes Pasteurella multocida, superseding the types cited in Opinion 13. Pasteurella gallicida is placed on the list of nomen rejicienda.
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Opinion 59: Designation of NCIB 11664 in Place of ATCC 23767 (NCIB 4112) as the Type Strain of Acetobacter aceti subsp. xylinum (Brown 1886) De Ley and Frateur 1974: Judicial Commission of the International Committee on Systematic Bacteriology
The Judicial commission designated NCIB 11664 as the type strain of Acetobacter aceti subsp. xylinum in place of strain ATCC 23767, which is a Gluconobacter sp.
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Opinion 60: Rejection of the Name Yersinia pseudotuberculosis subsp. pestis (van Loghem) Bercovier et al. 1981 and Conservation of the Name Yersinia pestis (Lehmann and Neumann) van Loghem 1944 for the Plague Bacillus: Judicial Commission of the International Committee on Systematic Bacteriology
The name Yersinia pseudotuberculosis subsp. pestis (van Loghem) Bercovier et al. 1981 has been rejected by the Judicial Commission of the International Committee on Systematic Bacteriology because of practical concerns about human welfare.
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- Errata
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