There are at least three genetically distinct small piroplasms from dogs

被引:125
作者
Kjemtrup, AM
Kocan, AA
Whitworth, L
Meinkoth, J
Birkenheuer, AJ
Cummings, J
Boudreaux, MK
Stockham, SL
Irizarry-Rovira, A
Conrad, PA [1 ]
机构
[1] Univ Calif Davis, Sch Vet Med, Dept Pathol Microbiol & Immunol, Davis, CA 95616 USA
[2] Oklahoma State Univ, Coll Vet Med, Dept Vet Pathobiol, Stillwater, OK 74078 USA
[3] N Carolina State Univ, Coll Vet Med, Dept Clin Sci, Raleigh, NC 27606 USA
[4] Auburn Univ, Coll Vet Med, Dept Pathobiol, Auburn, AL 36849 USA
[5] Univ Missouri, Coll Vet Med, Dept Vet Pathobiol, Columbia, MO 65211 USA
[6] Purdue Univ, Sch Vet Med, Dept Vet Pathobiol, W Lafayette, IN 47907 USA
关键词
Babesia gibsoni; Babesia canis; 18S rRNA phylogeny; piroplasms; anaemia; protozoa; tick-transmitted; tick vector;
D O I
10.1016/S0020-7519(00)00120-X
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
The 18S nuclear subunit ribosomal RNA (18S rRNA) gene of small piroplasms isolated from dogs from Okinawa (Japan), Oklahoma, North Carolina, Indiana, Missouri, and Alabama, was isolated and sequenced. Phylogenetic analysis of these sequences and comparisons with sequences from other Babesin, Cytauxzoon, and Theileria species revealed that all canine small babesial isolates, with the exception of isolates from California and Spain, were placed in a group containing the Babesia spp. sensu stricto. Within the Babesia spp. sensu stricto, there was support for separating the small canine piroplasms from the large canine piroplasm, Babesia canis. The isolate from California was in a distinct phylogenetic clade, closely related to babesial isolates from wildlife and humans from the Western US. The canine isolate from Spain was closely related to Babesin microti. These results suggest that there are multiple small piroplasm species in dogs. The isolates from the Midwestern and Eastern US and the one from Japan probably represent a single species with wide geographic distribution. (C) 2000 Australian Society for Parasitology Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1501 / 1505
页数:5
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