PDF(Pubmed)
Abstract：
This is an epidemiological study on the gastrointestinal nematode (GIN) and Eimeria coccidia infections in Kazakh sheep and the F1 and F2 generations of Kazakh × Texel sheep crosses. A total of 7599 sheep fecal samples were collected from the Zhaosu County and Nilka County in Ili Kazakh Autonomous Prefecture in the four seasons-spring, summer, autumn, and winter of 2019. The parasite causing the infection was identified by the saturated saline floating method, and the infection intensity was calculated by the modified McMaster method. SPSS19.0 was used to evaluate the differences in the fecal egg count (FEC) of for GIN and the fecal oocyst count (FOC) value of for coccidia per sample. The results showed that there were nine types of sheep GIN infections and Eimeria coccidia in these two counties of Ililocations, with the dominant parasite species of Haemonchus contortus, Trichostrongylus spp., and Ostertagia spp as the predominant parasites in the sheep. Most of the GIN and coccidia infections in these two regions were mild and moderate. The mean log (FEC) of GIN infection in the Zhaosu area was significantly higher than that in the Nilka area, whereas the mean log (FOC) of coccidia infection in Zhaosu was significantly lower than that of Nilka. The mean log (FEC) of GIN infection in the four seasons was the highest in spring, followed by in summer, then in autumn, and the lowest in winter. The mean log (FOC) of coccidia infection was the highest in spring, followed by in autumn, and was the lowest in summer and winter. The mean log (FEC) of GIN infection and log (FOC) of coccidia infection of Kazakh sheep was significantly higher than the F1 generation, which was then significantly higher than the F2 generation of summer. A positive correlation was found between the EPG and OPG levels in the sheep. These results showed that the GIN and coccidia infection intensities of the F1 generation sheep of Kazakh ×Texel crosses were significantly lower than that of Kazakh sheep paving the way for marker-based resistance selection.
摘要：
这是对哈萨克绵羊以及哈萨克×Texel绵羊杂交的F1和F2代的胃肠道线虫（GIN）和艾美球虫球虫感染的流行病学研究。在伊犁哈萨克自治州昭苏县和尼尔卡县四个季节-春季共采集绵羊粪便样本7599份,夏天,秋天,2019年的冬天。通过饱和盐水漂浮法鉴定引起感染的寄生虫，用改良的McMaster方法计算感染强度。SPSS19.0用于评估每个样品的GIN的粪便卵细胞计数（FEC）和球虫的粪便卵囊计数（FOC）值的差异。结果表明，在Ililocations的这两个县，有9种类型的绵羊GIN感染和艾美耳球虫，扭曲的Haemonchus的主要寄生虫物种，毛线菌属。,和Ostertagiaspp作为绵羊的主要寄生虫。这两个地区的大多数GIN和球虫感染为轻度和中度。昭苏地区GIN感染的平均对数(FEC)明显高于尼尔卡地区,而昭苏球虫感染的平均对数(FOC)显著低于尼尔卡。四季GIN感染的平均对数(FEC)在春季最高,其次是夏天，然后在秋天，冬季最低。球虫感染的平均对数（FOC）在春季最高，接着是秋天,夏季和冬季最低。哈萨克绵羊GIN感染的平均log(FEC)和球虫感染的log(FOC)显著高于F1代,然后明显高于夏季的F2代。绵羊的EPG和OPG水平之间存在正相关。这些结果表明，哈萨克×Texel杂交F1代绵羊的GIN和球虫感染强度显着低于哈萨克绵羊，为基于标记的抗性选择铺平了道路。
