Two Genetic Clusters in Swine Hemoplasmas Revealed by Analyses of the 16S rRNA and RNase P RNA Genes
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概要
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Only two hemoplasma species, Eperythrozoon parvum and Mycoplasma suis, have been recognized in pigs. Here we demonstrate the genetic variations among six hemoplasma strains detected from pigs, by analyzing the 16S rRNA and RNase P RNA (rnpB) genes, and propose a novel hemoplasma taxon that has not been described previously. Phylogenetic trees based on the nucleotide sequence of the 16S rRNA gene indicated that these six hemoplasmas were divided into two clusters representing M. suis and a novel taxon. We further examined the primary and secondary structures of the nucleotide sequences of the rnpB gene of the novel taxon, and found it distinct from that of M. suis. In conclusion, we unveiled a genetic cluster distinct from M. suis, suggesting a new swine hemoplasma species or E. parvum. Our findings also suggest that this novel cluster should be included in the genus Mycoplasma.
著者
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OBARA Hisato
Department of Veterinary Microbiology, School of Veterinary Medicine, Faculty of Agriculture, Iwate
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FUJIHARA Masatoshi
Department of Veterinary Microbiology, School of Veterinary Medicine, Faculty of Agriculture, Iwate
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WATANABE Yusaku
Department of Veterinary Microbiology, School of Veterinary Medicine, Faculty of Agriculture, Iwate
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Nagai Kazuya
Cryobiosystem Research Center Faculty Of Agriculture Iwate University
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Harasawa Ryo
Department Of Veterinary Medicine Faculty Of Agriculture Iwate University
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