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タイトル: Molecular evidence of the multiple genotype infection of a wild Hokkaido brown bear (Ursus arctos yesoensis) by Babesia sp. UR1
著者: Jinnai, Michio
Kawabuchi-Kurata, Takako
Tsuji, Masayoshi
Nakajima, Rui
Hirata, Haruyuki
Fujisawa, Kohei
Shiraki, Hiromi
Asakawa, Mitsuhiko
Nasuno, Toyohiko
Ishihara, Chiaki
キーワード: Babesia sp. UR1
Cytauxzoon sp.
Wild brown bear
Ursus arctos yesoensis
Multiple genotype infection
発行日: Oct-2010
出版者: Elsevier B.V.
抄録: A frozen-stored blood clot of a wild brown bear cub Ursus arctos yesoensis that had been captured in Hokkaido, Japan was examined for piroplasma infection using polymerase chain reaction (PCR). Two 18S ribosomal RNA gene (SSU rDNA) sequences were generated. One 1565-bp sequence showed the highest similarity with B. gibsoni (95.9% identity) but, phylogenetically, was found to belong to a distinct lineage. The other sequence (1709-bp) could not be definitively assigned to a described taxon, sharing only limited homology to the closest named species (90.1% identity with C. felis). In order to enhance information obtained from the SSU rDNA sequence, further detection and sequence analysis of the CCTη gene sequence were done revealing the simultaneous presence of three closely related genotypes (all in a monophyletic lineage) within a single bear host. This finding suggested the possibility that a new Babesia species (Babesia sp. UR1) might have been maintained in nature in wild brown bears. While the parasite's biology is yet unknown, to our knowledge, this is, excepting the single case documentation in 1910 of a hemoparasite in a bear at Russian zoo, the first reported case of piroplasms inhabiting a bear species.
URI: http://hdl.handle.net/10659/2866
ISSN: 0304-4017
著作権リンク: http://dx.doi.org/10.1016/j.vetpar.2010.06.018
出現コレクション:学術論文(雑誌)

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