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Nucleic acids in the classification of Campylobacters
European Journal of Clinical Microbiology
|August 1, 1983
Summary
Nucleic acid analysis clarifies Campylobacter species relationships, confirming distinct species like Campylobacter jejuni and Campylobacter coli. This aids accurate identification of these important human pathogens.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Campylobacters are significant human pathogens, necessitating improved identification methods.
- Accurate bacterial classification relies on understanding species relationships through nucleic acid analysis.
Purpose of the Study:
- To investigate Campylobacter species relationships using nucleic acid analyses.
- To establish a sound classification for Campylobacter strains from clinical and environmental sources.
Main Methods:
- Genome DNA base composition (mol% G + C) and molecular weight determination.
- DNA-DNA hybridization to assess genetic relatedness between taxa.
- Comparison of nucleic acid data with conventional biochemical tests, serology, and fatty acid profiles.
Main Results:
- Campylobacter species exhibit genome DNA base compositions ranging from 29 to 38 mol% G + C.
- DNA-DNA hybridizations revealed significant differences, confirming Campylobacter jejuni, Campylobacter coli, and the NARTC group (Campylobacter laridis) as distinct species.
- Campylobacter fetus (type species) has a mean G + C content of 35.7 mol%, while thermophilic species range from 31.5 to 32.6 mol%.
Conclusions:
- Nucleic acid analyses provide fundamental data for Campylobacter classification.
- DNA-DNA hybridization is effective in differentiating Campylobacter species.
- Further research on Campylobacter sputorum and allied species' nucleic acids is warranted.