The PCR detection and phylogenetic characterization of Babesia microti in questing ticks in Mongolia

被引:32
|
作者
Tuvshintulga, Bumduuren [1 ,2 ]
Sivakumar, Thillaiampalam [1 ]
Battsetseg, Badgar [2 ]
Narantsatsaral, Sandag-ochir [2 ]
Enkhtaivan, Batsaikhan [2 ]
Battur, Banzragch [2 ]
Hayashida, Kyoko [1 ]
Okubo, Kazuhiro [1 ]
Ishizaki, Takahiro [1 ]
Inoue, Noboru [1 ]
Igarashi, Ikuo [1 ]
Yokoyama, Naoaki [1 ]
机构
[1] Obihiro Univ Agr & Vet Med, Natl Res Ctr Protozoan Dis, Obihiro, Hokkaido 0808555, Japan
[2] Mongolian State Univ Agr, Inst Vet Med, Mol Genet Lab, Ulaanbaatar, Mongolia
关键词
B; microti; cox1; Mongolia; Ticks; tufA; 18S rRNA; IXODES-PERSULCATUS; APICOMPLEXAN PARASITES; BORNE PATHOGENS; TRANSFUSION; GENE; PREVALENCE; APICOPLAST; PROVINCE; RODENT; GENOME;
D O I
10.1016/j.parint.2015.07.007
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
Babesia microti is a tick-transmitted zoonotic hemoprotozoan parasite. In the present study, we investigated B. microti infection in questing ticks in Mongolia. A total of 219 questing ticks were collected from three different Mongolian provinces (Bayan-Olgii, Khovsgol, and Selenge). Of these, 63 from Selenge were identified as Ixodes persulcatus, while the remaining 156 (from all three provinces) were identified as Dermacentor nuttalli. When the tick DNA samples were screened using a B. microti-specific nested PCR, 19 (30.2%) of the 63 I. persulcatus ticks were found to be B. microti-positive. The parasite was not detected in D. nuttalli. Subsequently, the 18S rRNA, cox1, and tufA sequences of B. microti were amplified, sequenced, and subjected to phylogenetic analyses. Sequencing analyses showed that the Mongolian 18S rRNA, cox1, and tufA sequences were 99.6-100%, 96.7-97.2%, and 94.7-95.3% homologous, respectively, with B. microti R1 strain US-type sequences from humans. In the phylogenetic analyses, the Mongolian cox1 and tufA sequences were found to be separate lineages, which formed sister-clades to the R1 strain sequences, while all of the Mongolian B. microti 18S rRNA sequences were clustered within US-type clade containing several other sequences of human origin. In conclusion, in addition to reporting the presence of B. microti for the first time in questing ticks in Mongolia, the present study found that Mongolian I. persulcatus ticks were infected with US-type B. microti. These findings warrant large-scale studies to detect and characterize B. microti in ticks, small mammals, and humans. Such studies should provide us with a better understanding of zoonotic Babesia epidemiology in Mongolia. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:527 / 532
页数:6
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