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The phylogenetic position of Streptococcus and Enterococcus.

W Ludwig, E Seewaldt, R Kilpper-Bälz

Journal of General Microbiology

|March 1, 1985

Summary

This study characterized Streptococcus and Enterococcus species using 16S ribosomal RNA. Findings reveal three distinct clusters within this bacterial group, offering new phylogenetic insights.

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Area of Science:

Microbiology
Molecular Biology
Phylogenetics

Background:

Streptococcus and Enterococcus species are significant in various environments.
Understanding their evolutionary relationships is crucial for classification.

Purpose of the Study:

To phylogenetically characterize Streptococcus pyogenes, S. equinus, S. bovis, S. salivarius, S. sanguis, S. mutans, S. rattus, S. cricetus, S. lactis, S. raffinolactis, and Enterococcus faecalis.
To elucidate the evolutionary relationships within the Streptococcus-Enterococcus group.

Main Methods:

Oligonucleotide cataloguing of 16S ribosomal RNA (rRNA) sequences.
Phylogenetic analysis of bacterial rRNA data.

Main Results:

The studied organisms form a coherent phylogenetic group, related to lactobacilli and bacilli.

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This group is part of a subline within the Gram-positive eubacteria 'Clostridium' branch.

Three distinct clusters were identified within the Streptococcus-Enterococcus group: Enterococcus, lactic acid streptococci, and pyogenic/oral streptococci.

Conclusions:

The 16S rRNA analysis provides a robust framework for the classification of Streptococcus and Enterococcus species.
The identified clusters reflect evolutionary divergence within this bacterial group.
This research contributes to a refined understanding of Gram-positive bacterial phylogeny.