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Dysgonomonas mossii sp. nov., from human sources
Paul A Lawson1, Enevold Falsen, Elisabeth Inganäs
1School of Food Biosciences, The University of Reading, UK.
Systematic and Applied Microbiology
|October 2, 2002
Summary
Researchers identified a new bacterial species, Dysgonomonas mossii, from human clinical samples. This discovery expands the known diversity within the Dysgonomonas genus, aiding in bacterial classification and diagnostics.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Genomics
Background:
- Seven unidentified gram-negative, facultatively anaerobic, coccobacillus-shaped organisms were isolated from human clinical specimens.
- Accurate identification and classification of microorganisms are crucial for clinical diagnostics and understanding microbial diversity.
Purpose of the Study:
- To characterize and classify three novel bacterial isolates within the genus Dysgonomonas.
- To differentiate the new isolates from known Dysgonomonas species using phenotypic and phylogenetic methods.
Main Methods:
- Phenotypic characterization including biochemical tests.
- Phylogenetic analysis using comparative 16S rRNA gene sequencing.
- Determination of DNA base composition.
Main Results:
- Four isolates were identified as Dysgonomonas capnocytophagoides.
- Three isolates showed >5% 16S rRNA gene sequence divergence from known species, indicating a new species.
- Biochemical tests and DNA base composition supported the classification of the novel isolates as a new species within the Dysgonomonas genus.
Conclusions:
- The three novel isolates represent a new species, proposed as Dysgonomonas mossii sp. nov.
- Dysgonomonas mossii is distinct from D. capnocytophagoides and D. gadei based on genetic and phenotypic data.
- The type strain for Dysgonomonas mossii is CCUG 43457T (= CIP 107079T).