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Demonstrates high genetic similarity across diverse Coxiella burnetii strains via 16S rRNA sequencing, indicating the genus comprises a single species.
DNA coding for the 16S rRNA of six strains of the obligate intracellular bacterium Coxiella burnetii was directly amplified from lysed host cells using the polymerase chain reaction. The amplification product was sequenced using a linear-PCR procedure and compared with other published 16S rRNA sequences. The results of this analysis confirm the position of C. burnetii in the gamma subgroup of the proteobacteria. The data show that all of the C. burnetii strains are highly related (> 99%) on the basis of 16S rRNA sequences although they had different geographic origins and phenotypic characteristics. The data support a phylogenetic homogeneity of the genus Coxiella with only one species which is C. burnetii.
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Stein et al. (1993) studied this question.
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