Radical changes to chlamydial taxonomy are not necessary just yet
| Autor: | J T Grayston, J. Orfila, P M Bavoil, Richard S. Stephens, R. Hsia, Max Chernesky, C Gaydos, L A Campbell, H. Caldwell, S P Wang, David M. Ojcius, J. Boman, Pekka Saikku, W E Stamm, Rosanna W. Peeling, M. Leinonnen, R G Rank, G. McClarty, Svend Birkelund, D T Taylor-Robinson, C C Kuo, T. Hackstadt, D Ocjius, T. C. Quinn, J. Raulston, Gunna Christiansen, Julius Schachter, B. Kaltenboeck, P. B. Wyrick, M Puolakkainen, Peter Timms, G. L. Ridgeway, Ian N. Clarke |
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| Rok vydání: | 2001 |
| Předmět: |
Chlamydia psittaci
biology Zoology General Medicine Ribosomal RNA biology.organism_classification medicine.disease_cause 16S ribosomal RNA Microbiology Homology (biology) Phylogenetics 23S ribosomal RNA Evolutionary biology medicine Taxonomy (biology) Chlamydia trachomatis Ecology Evolution Behavior and Systematics |
| Zdroj: | International Journal of Systematic and Evolutionary Microbiology. 51:249-249 |
| ISSN: | 1466-5034 1466-5026 |
| DOI: | 10.1099/00207713-51-1-249 |
| Popis: | We, the undersigned, strongly object to the proposed reclassification of the order Chlamydiales (Everett et al., 1999). It should not be accepted at this stage. That Chlamydia psittaci and Chlamydia trachomatis each comprised a heterogeneous group of organisms lumped into two species was recognized when those species were first designated. However, these organisms were placed into a single genus based on DNA homology, and a set of convenient, relatively easily assayed biological properties. The need for further speciation in the future was recognized, but workers in the field delayed reclassification waiting for identification of taxonomically significant biological properties. This was the basis for classifying Chlamydia pneumoniae as a separate species. One of our major concerns is that this new classification scheme, based almost exclusively on minor sequence dierences in 16S and 23S rRNA genes, has no new biological markers for genus or species dierentiation. Some of the new species include too few isolates to be confident that these small dierences will be maintained as more isolates are evaluated. There is increasing agreement among microbial taxonomists that while 16S rRNA is useful for evolutionary studies, it is not always the best choice for speciation. Genus-specific genes would be better. |
| Databáze: | OpenAIRE |
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