Yu Zheng-Qing, Song Jun-Ke, Zhang Hui-Jun, Liu Ting-Li, Fan Xian-Cheng, Zhao Guang-Hui
* College of Veterinary Medicine, Northwest A&F University College of Veterinary Medicine, Northwest A&F University.
J Parasitol. 2018 Aug 29. doi: 10.1645/18-38.
Theileriosis is an important tick-borne pathogen of livestock globally, causing severe reduction of livestock productivity and economic loss. To systematically investigate the prevalence and species of Theileria spp. in goats from Shaanxi province, a total of 509 blood samples were collected from dairy, cashmere and meat goats from 7 counties, and examined by using the microscopic examination and the nested PCR targeting the SSU rRNA gene. Of them, 268 (52.7%, 268/509) were positive for Theileria infection. The prevalence was closely associated with ages and production categories. The highest infection was found in meat goats of 7 to 12-months, and lowest was detected in cashmere goats of 3 to 6 months. Sequence analysis indicated the presence of 2 Theileria species, with Theileria luwenshuni as the prevalent species and the first report of Theileria sp. OT3 in goats in China. These findings indicated the wide distribution of Theileria spp. in goats of Shaanxi province, and would shed new light on the distribution of this parasite in China.
泰勒虫病是全球重要的家畜蜱传病原体，可导致家畜生产力严重下降和经济损失。为系统调查陕西省山羊泰勒虫的流行情况及种类，从7个县的奶山羊、绒山羊和肉用山羊中采集了509份血样，采用显微镜检查和针对小亚基核糖体RNA（SSU rRNA）基因的巢式聚合酶链反应（PCR）进行检测。其中，268份（52.7%，268/509）泰勒虫感染呈阳性。感染率与年龄和生产类型密切相关。7至12月龄的肉用山羊感染率最高，3至6月龄的绒山羊感染率最低。序列分析表明存在2种泰勒虫，其中吕氏泰勒虫为优势种，泰勒虫OT3为在中国山羊中首次报道。这些发现表明泰勒虫在陕西省山羊中广泛分布，将为该寄生虫在中国的分布提供新的线索。
