A numerical phenotypic taxonomic study of the genus Neisseria

Barrett, Sharon; Sneath, P. H. A.

doi:10.1099/00221287-140-10-2867

Cited by 58 publications

(44 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is possible that the genus Simonsiella had a monophyletic origin and that 16S rDNA evidence of the monophyly of the group was lost. Discrepancies abound between 16S rDNA phylogenies of the genus Neisseria and those derived from analyses of other loci (Smith et al, 1999) or from chemotaxonomic data (Barrett & Sneath, 1994). Smith et al (1999) suggested that the anomalies were due to interspecies gene exchange.…”

Section: Resultsmentioning

confidence: 99%

Phylogeny of the genus Simonsiella and other members of the Neisseriaceae.

Hedlund¹,

Staley²

2002

International Journal of Systematic and Evolutionary Microbiology

View full text Add to dashboard Cite

16S rDNA was sequenced from 16 strains of the oral commensal Simonsiella and was used to assess relationships between Simonsiella strains and other members of the Neisseriaceae. In all analyses, Simonsiella strains grouped according to established species designations and the mammalian hosts from which they were isolated. The commensals from cats and dogs formed a monophyletic group. The monophyly of the genus Simonsiella, however, could be neither supported nor rejected ; deep nodes in the trees were unstable depending on the phylogenetic method or on the particular sequences used in the analysis. Instabilities may be attributable to frequent gene transfer between Neisseria or other members of the Neisseriaceae and Simonsiella.

show abstract

Section: Resultsmentioning

confidence: 99%

Phylogeny of the genus Simonsiella and other members of the Neisseriaceae.

Hedlund¹,

Staley²

2002

International Journal of Systematic and Evolutionary Microbiology

View full text Add to dashboard Cite

show abstract

“…The multidimensional space of phenotypic diversity can then be collapsed onto two or three axes, for example, by principal component analysis. Practitioners of numerical taxonomy have clearly illustrated the discrete nature of phenotypic clusters within many bacterial genera (9). Note that phenotype-based numerical taxonomy is ultimately much more than a method for delimiting species; it is also a venture into the natural history of a bacterial group.…”

Section: Bacterial Species As Phenotypic and Genetic Clustersmentioning

confidence: 99%

What are Bacterial Species?

Cohan

2002

Annu. Rev. Microbiol.

643

549

View full text Add to dashboard Cite

MLSTs Abstract Bacterial systematics has not yet reached a consensus for defining the fundamental unit of biological diversity, the species. The past half-century of bacterial systematics has been characterized by improvements in methods for demarcating species as phenotypic and genetic clusters, but species demarcation has not been guided by a theory-based concept of species. Eukaryote systematists have developed a universal concept of species: A species is a group of organisms whose divergence is capped by a force of cohesion; divergence between different species is irreversible; and different species are ecologically distinct. In the case of bacteria, these universal properties are held not by the named species of systematics but by ecotypes. These are populations of organisms occupying the same ecological niche, whose divergence is purged recurrently by natural selection. These ecotypes can be discovered by several universal sequence-based approaches. These molecular methods suggest that a typical named species contains many ecotypes, each with the universal attributes of species. A named bacterial species is thus more like a genus than a species.

show abstract

“…nov.; 2, Neisseria; 3, Kingella; 4, Eikenella; 5, Simonsiella; 6, Alysiella. Data for reference genera were obtained from Vedros (1984), Jackson & Goodman, (1984), Larkin (1989), Morse & Knapp (1991), Dewhirst et al (1993), Barrett & Sneath (1994) and Hedlund & Staley (2002). Symbols: +, positive; 2, negative; V, variable; ND, not determined.…”

mentioning

confidence: 99%

Uruburuella suis gen. nov., sp. nov., isolated from clinical specimens of pigs

Vela

Collins

Lawson

et al. 2005

International Journal of Systematic and Evolutionary Microbiology

View full text Add to dashboard Cite

Five strains of an unusual Gram-negative, catalase-positive, oxidase-positive, coccobacillus-shaped bacterium isolated from the lungs and heart of pigs with pneumonia and pericarditis were characterized by phenotypic and molecular genetic methods. On the basis of cellular morphology and biochemical criteria, the isolates were tentatively assigned to the family Neisseriaceae, although they did not appear to correspond to any recognized genus or species. Comparative 16S rRNA gene sequencing showed that the five unidentified strains were phylogenetically highly related to each other and represent a hitherto unknown subline within the family Neisseriaceae. On the basis of both phenotypic and phylogenetic evidence, it is proposed that the unknown isolates from pigs be classified as a novel genus and species within the family Neisseriaceae, for which the name Uruburuella suis gen. nov., sp. nov. is proposed. The type strain of U. suis is 1258/02 T (=CCUG 47806 T =CECT 5685 T ).The family Neisseriaceae was proposed by Prévot in 1933. As circumscribed by Bøvre (1984), it accommodated a group of Gram-negative, oxidase-and catalase-positive, aerobic or facultatively anaerobic, non-spore-forming, rodor coccoid-shaped organisms and embraced four genera: Neisseria, Kingella, Acinetobacter and Moraxella (Bøvre, 1984). The family Neisseriaceae has undergone various revisions over the years, and numerous other genera have been assigned to it [e.g. Psychrobacter (Juni & Heym, 1986), Mesophilobacter (Nishimura et al., 1989), Alysiella (Rossau et al., 1989) and Eikenella and Simonsiella (Dewhirst et al., 1989)]. On the basis of rRNA cistron similarity studies, Rossau et al. (1986) recommended that the genera Acinetobacter, Moraxella and Branhamella be excluded from the family Neisseriaceae. Subsequent studies by Rossau et al. (1989) showed that the genera Neisseria, Kingella, Eikenella, Simonsiella and Alysiella were closely related and should be classified together in the family Neisseriaceae, which comprises a major branch of the b-Proteobacteria. Comparative 16S rRNA gene sequencing studies by Dewhirst et al. (1989) confirmed the results of Rossau et al. (1989) and led to the recommendation that the genera Eikenella and Simonsiella be transferred to the family Neisseriaceae. In recent years, other genera, e.g. Laribacter (Yuen et al., 2001) and Microvirgula (Patureau et al., 1998), have been described and assigned to the family Neisseriaceae.Organisms within the family Neisseriaceae can be isolated from a range of environmental sources (Moss & Bryant, 1982) as well as from different human and animal mucosal surfaces (Kuhn, 1981;Snell, 1984). Only two species, Neisseria gonorrhoeae and Neisseria meningitidis, are wellestablished human pathogens (Morse & Knapp, 1991). Other species of the Neisseriaceae have been implicated as opportunistic human pathogens in a number of different clinical processes (Wong & Janda, 1992;Dolter et al., 1998). In veterinary medicine, too, neisseriae have been implicated as pathogens in a number of ...

show abstract

A numerical phenotypic taxonomic study of the genus Neisseria

Cited by 58 publications

References 44 publications

Phylogeny of the genus Simonsiella and other members of the Neisseriaceae.

Phylogeny of the genus Simonsiella and other members of the Neisseriaceae.

What are Bacterial Species?

Uruburuella suis gen. nov., sp. nov., isolated from clinical specimens of pigs

Contact Info

Product

Resources

About