Expression of sheep pathogen Babesia sp Xinjiang rhoptry-associated protein 1 and evaluation of its diagnostic potential by enzyme-linked immunosorbent assay

文献类型： 外文期刊

第一作者： Niu, Qingli

作者： Niu, Qingli;Liu, Zhijie;Yang, Jifei;Yu, Peifa;Pan, Yuping;Zhai, Bintao;Luo, Jianxun;Guan, Guiquan;Yin, Hong;Yin, Hong

作者机构：

关键词： Babesia sp;Xinjiang;rhoptry-associated protein;expression;serodiagnosis

期刊名称：PARASITOLOGY （ 影响因子：3.234； 五年影响因子：3.118 ）

ISSN： 0031-1820

年卷期： 2016 年 143 卷 14 期

页码：

收录情况： SCI

摘要： Ovine babesiosis is one of the most important tick-borne haemoparasitic diseases of small ruminants. The ovine parasite Babesia sp. Xinjiang is widespread in China. In this study, recombinant full-length XJrRAP-1a alpha 2 (rhoptry-associated protein 1a alpha 2) and C-terminal XJrRAP-1a alpha 2 CT of Babesia sp. Xinjiang were expressed and used to evaluate their diagnostic potential for Babesia sp. Xinjiang infections by indirect enzyme-linked immunosorbent assay (ELISA). Purified XJrRAP-1a alpha 2 was tested for reactivity with sera from animals experimentally infected with Babesia sp. Xinjiang and other haemoparasites using Western blotting and ELISA. The results showed no cross-reactivities between XJrRAP-1a alpha 2 CT and sera from animals infected by other pathogens. High level of antibodies against RAP-1a usually lasted 10 weeks post-infection (wpi). A total of 3690 serum samples from small ruminants in 23 provinces located in 59 different regions of China were tested by ELISA. The results indicated that the average positive rate was 3043%, and the infections were found in all of the investigated provinces. This is the first report on the expression and potential use of a recombinant XJrRAP-1a alpha 2 CT antigen for the development of serological assays for the diagnosis of ovine babesiosis, caused by Babesia sp. Xinjiang.

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