Identification and isolation of pathogenic Theileria orientalis Ikeda genotype from confined dairy cattle, in Hebei, China

文献类型： 外文期刊

第一作者： Liu, Junlong

作者： Liu, Junlong;Li, Zhi;Liu, Aihong;Wang, Jinming;Guan, Guiquan;Yin, Hong;Luo, Jianxun;Yin, Hong

作者机构：

关键词： Theileria orientalis; Pathogenic; Phylogenetic; Ikeda genotype; Dairy cattle

期刊名称：PARASITOLOGY RESEARCH （ 影响因子：2.383； 五年影响因子：2.348 ）

ISSN： 0932-0113

年卷期： 2022 年 121 卷 1 期

页码：

收录情况： SCI

摘要： Theileria orientalis is known to be a group of benign cattle parasites with a cosmopolitan distribution, and has been classified into 11 genotypes through MPSP gene phylogenetic analysis. In China, T. orientalis is the most prevalent Theileria species, with several genotypes, but few fatal cases have been reported. In June 2020, dairy cattle in Zhangjiakou, Hebei Province, showed clinical symptoms of piroplasmosis, causing many animals to die. Blood smears and PCR detection results confirmed T. orientalis infection with a 66.7% positive rate of collected blood samples. The MPSP sequences analysis revealed parasite genotypes 1 (Chitose) and 2 (Ikeda). Aiming to isolate the pathogens, experimental animal was infected with T. orientalis via inoculation of the positive blood samples. The results has shown that only T. orientalis genotype 2 (Ikeda) was obtained that has confirmed by MPSP and 18S rRNA sequences analysis, indicating that the Ikeda type was predominant and responsible for the disease. Although many T. orientalis genotypes are present in China, the possibility of T. orientalis genotypes 1 and 2 infections in confined dairy cattle should be considered to avoid additional economic losses.

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