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为了掌握玉树州羊群的泰勒虫感染情况,为羊梨形虫病的防治提供依据,我们采用ELISA方法对玉树州五县一市的养殖场羊群进行了泰勒虫感染概况的调查。结果显示768份猪血液样品中,共检测到382份血清样品呈泰勒虫血清抗体阳性,阳性率为49．74％,处于较高的感染水平,表明羊泰勒虫病在玉树州羊群中流行相当严重,应采取灭蜱和药物治疗羊体内原虫相结合方法防治羊泰勒虫病： 相似文献
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羊泰勒焦虫病是由泰勒科（Theileriidae）泰勒属（Theileria）的原虫寄生在羊和其它野生动物的网状内皮系统细胞和红细胞内所引起的一种寄生虫病，近年来，随着养羊业规模的不断扩大和气候环境的变化，羊泰勒焦虫病的发生更加严重，制约着我州畜牧业的健康发展。本文着重探讨了绵羊泰勒焦虫病在高寒阴湿牧区的发生、流行规律及防治措施。 相似文献
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本研究用间接酶联免疫吸附试验(ELISA)结合聚合酶链式反应(PCR)对我国江西省60头肉牛样品(包括血清和血液基因组)进行了牛泰勒虫病的初步调查。结果显示,该省泰勒虫血清阳性率为100%,PCR检测阳性率28.3%。其中,环形泰勒虫(Ta)阳性率为26.7%,瑟氏泰勒虫(Tser)阳性率为15%,中华泰勒虫(Tsin)阳性率为3.3%,环形泰勒虫和瑟氏泰勒虫共同感染率为13.3%,环形泰勒虫和中华泰勒虫共同感染率为3.3%。结果表明,江西省牛泰勒虫病感染较为严重,本研究为该地区牛泰勒虫病的综合防治提供了数据参考。 相似文献
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1泰勒虫病 奶牛泰勒虫病曾称泰氏焦虫病,是由环形泰勒虫和瑟氏泰勒虫所引起的一种原虫病。本病的特征为：贫血、全身出血、淋巴结肿胀。 相似文献
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Foot and mouth disease (FMD) is caused by foot-and-mouth disease virus (FMDV) and affects cloven hoofed animals,it is an acute and potent infectious disease which has caused great loss in some regions. Up to now, people still use vaccines to prevent and control FMD which has become the the popular ways. Prepared by virus'antigen epitopes and carried with multiple epitopes and helper epitope,the epitope-based vaccine against FMD which has caught people's attention to it owing to it has high safety and is easy to be manipulated and controlled.In recent years,the research based on epitope of FMDV has made great progress.Now we review the latest progress of the FMDV epitopes and the epitope-based vaccine against FMD in this paper, in order to provide relevant preferences for the development of the vaccines with high security and efficiency. 相似文献
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内蒙古二狼山白山羊遗传性甲状腺肿杂合子的测交试验,以及其纯合子甲状腺组织中T_3、T_4免疫组化定量、半定量和定位分析结果表明,本病属常染色体单基因隐性遗传病;其纯合子羔羊甲状腺明显肿大(P<0.01),甲状腺组织高度增生,T_3、T_4含量明显降低(P<0.01);T_3、T_4主要定位于滤泡腔胶质和滤泡上皮细胞滤泡腔缘的胞浆中,且着色强弱不一.T_3、T_4的半定量与定量分析之间呈密切的直线相关关系.讨论了二狼山白山羊甲状腺肿大的原因、结果,以及T_3、T_4的定位与甲状腺上皮细胞功能的关系. 相似文献
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Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of paratuberculosis (ParaTB) also known as Johne’s disease (JD) in ruminants, which is characterized by chronic intestinal inflammation. A similar counterpart has been observed in the form of Crohn's disease in humans. The present study is the first trail in goats to understand the peripheral cellular immune responses following experimental MAP infection and vaccination. Fifteen apparently healthy male kids (3–6 months old) of Barbari breed were included in this study. In the experimental study, 5 kids were infected with ‘S 5’ strain of MAP (“Indian Bison Type”), 5 were vaccinated (Indigenous Vaccine) against MAP infection (Singh et al., 2007) and the remaining 5 kids were uninfected and non-vaccinated controls. Kids were observed for a period of 180 days post exposure (infection and vaccination) and were tested for development of infection. Cellular immune responses (in blood) were recorded post-exposure by three assays. We measured the frequencies of CD4 and CD8T cells, estimated plasma IFNγ and TNα and in the third assay, in vitro cytokine production by peripheral blood mononuclear cells (PBMCs) from vaccinated, infected and controls were examined in response to polyclonal stimulation. The frequencies of peripheral CD4 and CD8T cells were comparable in control, infected and vaccinated animals except around day 49 post-infection where MAP infected animals showed a trend towards significantly reduced frequencies of CD4 T cells compared to apparently healthy controls. Significantly reduced plasma TNFα levels were also observed in infected animals compared to vaccinated animals,during the course of infection. Diminished levels (although non significant) of TNFα were observed in the supernatants from polyclonally stimulated PBMCs at around day 49 post infection. It is conceivable that the diminished cellular immune responses may coincide with an impairment (immune exhaustion) of perhaps antigen-specific CD4T cells that might, in the course of infection, contribute to the progressive nature of caprine paratuberculosis. 相似文献
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为了分析猪源新城疫病毒F和HN基因对BHK-21细胞膜的融合作用,采用RT-PCR方法从猪源新城疫病毒JL01株中扩增获得了F蛋白基因,并根据GenBank上登录的猪源新城疫病毒HN基因序列,合成了HN基因,分别将F和HN基因克隆到pKS载体上。又从大肠杆菌BL21（DE3）中扩增得到T7RNA聚合酶基因,将报告基因EGFP与T7RNA聚合酶基因一起定向克隆到痘苗病毒转移载体pSTK上。再将pKS-F、pKS-HN与pSTK-T7-EGFP共转染BHK-21细胞,转染后16h,用Giemsa染液进行染色,可见明显的细胞融合现象。该研究证明猪源新城疫病毒JL01株的F和HN蛋白共同作用于BHK-21细胞使细胞膜融合。 相似文献
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复方中药成分对新城疫疫苗免疫雏鸡外周血T淋巴细胞转化和血清抗体效价的影响 总被引：13，自引：0，他引：13
选择4种中药成分（黄芪多糖、淫羊藿多糖、峰胶黄酮、人参皂甙）组成2个复方，各按3个剂量水平与新城疫疫苗混合后免疫雏鸡，以无佐剂苗和油乳苗为对照，分别于免疫后7、14、21、28、35、42d采血，用MTT法和微量血凝法测定T淋巴细胞转化和血清抗体效价的动态变化。结果表明。中药佐剂能显著促进淋巴细胞转化。提高血清抗体效价，多数时间点与油佐剂的效果相当，部分时间点显著强于油佐剂。综合判定方1高剂量和方2中剂量的效果最好。 相似文献
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van Galen G Cassart D Sandersen C Delguste C Nollet H Amory H Ducatelle R 《Equine veterinary journal》2008,40(2):185-188
Polyneuritis equi (PNE) is a rare neurological disease in the horse. Because of the suspicion in PNE of a T-lymphocyte mediated immune response against the myelin, the objective of this study was to determine the composition of the inflammatory infiltrate in the involved nerves of 3 horses with PNE, studied retrospectively. T-lymphocytes were demonstrated in the lesions, which suggests a T-lymphocyte mediated immune response against myelin. In addition, the presence of B-lymphocytes indicated a local production of antibodies. More research, involving a prospective study, is needed to determine whether the T-lymphocytes are cytotoxic or T-helper lymphocytes. 相似文献
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Bovine tuberculosis is an important worldwide disease mainly related to cattle, although it also affects other mammals, including humans. In recent years, there have been considerable advances in the knowledge of the immune response mechanisms underlying the interaction of Mycobacterium bovis, the main agent of bovine tuberculosis, with its hosts. In this review we describe the most recent findings on the cattle immune response to M. bovis, particularly regarding trained innate immune responses and γδ T cells, that could support the development of vaccines and diagnostic tools to control this disease. 相似文献