用于病毒细菌凝集试验的固体免疫剂的研制和应用

用于制备固体免疫剂的液体免疫剂最佳组合：ＴＭＶ,ＣＭＶ和ＴｕＭＶ抗血清的稀释度分别为１／２５６、１／６４和１／１２８,金黄色葡萄球菌菌悬液浓度为１１％、０．０１ｍｏｌ／Ｌ ＰＢＳ的ｐＨ值为７．０,甘油浓度为１０％。液体制剂冻干过程的降温方式为二步法。固体制剂贮藏条件的最佳组合：含水量为３．２％,贮藏温度为－１０℃。固体制剂在－１０℃贮藏１年后,采用病毒细菌凝集试验检测ＴＭＶ,ＣＭＶ和ＴｕＭＶ纯病毒     

青海地区野生狐狸棘球绦虫感染情况调查研究

野生狐狸是棘球绦虫的主要终末宿主,在棘球蚴病的传播中有重要作用.为了解青海省狐狸中棘球绦虫感染状况,我们用棘球绦虫粪抗原检测试剂盒,对收集于青海省称多县、贵南县、祁连县的野生狐狸粪便进行了检测.结果表明,称多县收集的129份狐狸粪便阳性15份,阳性率11.6％;祁连县收集的84份狐狸粪便阳性3份,阳性率3.6％;贵南县...     

旋毛虫p53糖蛋白抗原研究进展

旋毛虫p53糖蛋白是旋毛虫肌幼虫排泄分泌抗原的主要抗原组分之一,具有肌幼虫期特异表达特性,主要定位在肌幼虫β-杆细胞.不同旋毛虫种p53糖蛋白氨基酸序列相对保守,但抗原性有差异,在同一种内变异极少,具有种及属特异性抗原表位.论文就旋毛虫p53糖蛋白抗原的分子结构、不同发育时期的特异性表达、抗原性等方面的研究进展进行综述...     

检测狂犬病病毒抗原的夹心间接Dot—ELISA的建立和应用研究

本研究建立了检测狂犬病病毒抗原的夹心间接斑点酶联免疫吸附试验(SI-Dot-ELISA).本法检出狂犬病病毒抗原的最低浓度为:0.01IU/mL的标准抗原,1:100000 (相当于20 LD_(50))的狂犬病病毒CVS株和鹿8202株的鼠脑悬液,1:400(相当于7906TCID_(50)/mL)的狂犬病病毒SAG株的细胞培养物.对多种健康动物的组织、健康细胞培养物以及犬瘟热病毒、犬腺病毒等检测均为阴性.用SI—Dot—ELISA、夹心间接ELISA(SI—ELISA)和小鼠脑内接种3种方法,检测了388份材料,检出的阳性份数分别为173、171和179,经统计学处理,3种方法在狂犬病病毒抗原的检测上,可以相互代替.甲醛灭活病毒不影响本方法的检测,而加入氢氧化铝胶后的病毒悬液则不能用本法检测.本法适用于狂犬病的诊断、流行病学调查、疫苗效价的测定和实验研究中病毒抗原的测定.     

捻转血矛线虫HLJ株15 ES抗原基因的原核表达

为了对羊源捻转血矛线虫(H.contortus)15 ES抗原基因进行原核表达,本研究利用RT-PCR技术从黑龙江省羊源H.contortus成虫总RNA中扩增得到相对分子质量15Ku ES蛋白基因(H15 ES),序列分析表明,其核苷酸序列与国外已发表的15 ku排泄分泌抗原基因的同源性为99.78%.将H15 ES克隆至pET-32a(+)中,构建重组表达质粒pET-32a-H15 ES,转化大肠杆菌,IPTG诱导表达,经SDS-PAGE电泳和western blot分析表明,表达蛋白相对分子质量约为35.2 ku.本研究为H.contortus病诊断抗原和保护性抗原的大量制备及H.contortus核酸疫苗的研究奠定了基础.     

夹心酶联免疫吸附试验检测包虫病循环抗原

建立了检测包虫病循环抗原的夹心酶联免疫吸附试验。对１３０份阳性血清（猪６５,羊６５）作了检测,总阳性率为７９．２％,抗原最小检出量为５０μｇ／Ｌ。     

猪萎缩性鼻炎凝集反应抗原的制备及应用

为快速地诊断猪萎缩性鼻炎及监测其免疫状况,本试验在对支气管败血波氏杆菌保存菌种进行复苏和全面鉴定的基础上,制备了猪萎缩性鼻炎凝集反应抗原,经凝集反应试验表明,该抗原在PBS中不发生自凝,与猪传染性胸膜肺炎、猪喘气病和猪瘟的阳性血清均无凝集反应,而对猪萎缩性鼻炎标准阳性血清的凝集效价高达1∶10 240以上,具有较高的特异性和敏感性;对20份免疫母猪所产仔猪血清样本进行检测,检出率为95%.     

Bovine Cells Infected in Vivo with Theileria Annulata Express CD11b,the C3bi Complement Receptor

Forsyth, L.M.G., Jackson, L.A., Wilkie, G., Sanderson, A., Brown, C.G.D. and Preston, P.M., 1997. Bovine cells infected in vivo with Theileria annulata express CD11b, the C3bi complement receptor. Veterinary Research Communications, 21 (4), 249-263Bovine cells from cattle infected with Theileria annulata were phenotyped with monoclonal antibodies recognizing bovine leukocyte antigens. Macroschizont-infected, transformed cell lines prepared from peripheral blood mononuclear cells of cattle, infected with sporozoites, were assessed by flow cytometry; parasitized cells in tissues from infected cattle were examined by immunocytochemical techniques. Co-expression of markers for different cell lineages by the cell lines precluded a definite conclusion as to their phenotypic origins. For, while the pattern of leukocyte antigens expressed by these in vivo-derived schizont-infected cells, which included CD11b, was indicative of a myeloid origin, the possibility that they were NK cells could not be excluded. The monoclonal antibody (MAb) IL-A15, which recognizes CD11b, reacted with a high proportion of parasitized cells in sections of tissues from infected cattle at all stages of acute disease. Mononuclear cells infected with parasites at all stages of differentiation, from macroschizont to microschizont, expressed CD11b. Such parasitized cells occurred throughout the lymphoid tissues, being found in the thymus, spleen and lymph nodes, particularly the prescapular node draining the site of infection, the hepatic, mesenteric and precrural nodes, as well as in the reticulo-endothelial tissue of the liver, kidney, lung, abomasum, adrenal and pituitary glands. These observations provided the first evidence for a myeloid origin for the parasitized T. annulata cells found in infected bovine tissues and blood and suggested a mechanism whereby schizonts could transfer from cell to cell during mechanical infection with schizont-infected cells.     

沈阳地区鸡慢性呼吸道病的流行病学调查

采用玻片凝集试验结合现场观察，对沈阳地区15个鸡场不同品种和日龄的未免疫鸡进行了鸡慢性呼吸道病(CRD)流行病学调查。共检测了300份鸡血清，平均阳性率33％。被调查的15个鸡场中的12个鸡场显示有CRD血清抗体阳性鸡，表明沈阳地区一些鸡场鸡群已被鸡败血霉形体(MG)感染，有的鸡场还相当严重。     

H-Y抗原候选基因的研究进展

雄性特异性组织相容性抗原(male specific minor histompatibility antigens,H-Y抗原)是由Y染色体上的基因编码,在雄性动物细胞中普遍表达(包括胚胎和滋养层细胞)。H-Y抗原不仅能引起基因型相同的雌性动物排斥雄性组织,也能导致人白细胞抗原匹配干细胞移植术后出现移植抗宿主性疾病(GVH)。细胞毒性T淋巴细胞检测到几个不同的H-Y抗原表位,这些肽是从胞内蛋白分离出来,由主要组织相容性复合分子结合呈递在细胞表面。H-Y抗原肽与人白细胞抗原Ⅰ类和Ⅱ类分子特异结合参与免疫反应,从而影响移植结果。近年来越来越多的文献报道了H-Y抗原的相关研究,作者主要综述编码H-Y抗原的相关候选基因,并对它在疾病等方面的前景作出了一些展望。