中国青海牦牛（Bos grunniens）新孢子虫和弓形虫感染的血清流行病学研究
Seroepidemiology of Neospora caninum and Toxoplasma gondii infection in yaks (Bos grunniens) in Qinghai, China.
作者信息
Liu J, Cai J Z, Zhang W, Liu Q, Chen D, Han J P, Liu Q R
机构信息
Parasitology Laboratory, Department of Veterinary Preventive Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China.
出版信息
Vet Parasitol. 2008 Apr 15;152(3-4):330-2. doi: 10.1016/j.vetpar.2007.12.010. Epub 2007 Dec 23.
Neospora caninum is a protozoan parasite and is closely related to Toxoplasma gondii, but they are antigenically different. N. caninum and T. gondii infection in a variety of animals such as cattle, dogs, and cats has been reported, but there is little information on the infection of these parasites in domestic yaks. Seroprevalence of antibodies to T. gondii and N. caninum in yaks (Bos grunniens) from eight regions of Qinghai, China were investigated by the indirect agglutination test (IAT) and ELISA, respectively. A total of 112 (11.8%) of 946 serum samples were positive for antibodies to T. gondii, and 21 samples (2.2%) were positive to N. caninum. Two of the yaks had antibodies to both parasites. There was no apparent association of T. gondii infection with age of the animals. The results indicate that T. gondii infection is prevalent in Chinese yaks in most parts of Qinghai province and N. caninum infection rate in the same species is relatively low. This is the first large study showing the infection of T. gondii and N. caninum in domestic yaks.
犬新孢子虫是一种原生动物寄生虫，与刚地弓形虫密切相关，但它们在抗原性上有所不同。犬新孢子虫和刚地弓形虫在牛、狗和猫等多种动物中的感染已有报道，但关于这些寄生虫在家养牦牛中的感染情况的信息却很少。分别通过间接凝集试验（IAT）和酶联免疫吸附测定（ELISA）对来自中国青海八个地区的牦牛（Bos grunniens）血清中针对刚地弓形虫和犬新孢子虫的抗体血清阳性率进行了调查。在946份血清样本中，共有112份（11.8%）针对刚地弓形虫的抗体呈阳性，21份样本（2.2%）针对犬新孢子虫的抗体呈阳性。其中两头牦牛同时具有针对这两种寄生虫的抗体。刚地弓形虫感染与动物年龄之间没有明显关联。结果表明，刚地弓形虫感染在青海省大部分地区的中国牦牛中普遍存在，而同一物种中犬新孢子虫的感染率相对较低。这是首次关于家养牦牛感染刚地弓形虫和犬新孢子虫的大型研究。
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