牛流产病例的诊断报告

为确诊牛频繁发生流产的病因,将30份牛血清分别用试管凝集反应和虎红平板凝集反应检测牛布氏杆菌抗体.结果表明,虎红平板凝集反应检测的阳性率为93.3%(28/30),试管凝集反应检测的阳性率为93.3%(28/30),2种检测方法结果一致,可初步诊断为布氏杆菌病.     

天峻县部分乡镇藏羊种公羊布氏杆菌病的血清学调查

用布氏杆菌试管凝集试验(SAT),对来自青海省天峻县三个乡镇的土种藏羊种公羊,进行了羊布氏杆菌沉淀抗体的检测。结果:共检测6 932份藏羊种公羊血清样品,结果:检出阳性血清17份,阳性率为0.25%;     

南非II型口蹄疫间接ELISA检测方法的建立

为满足口岸对南非II型口蹄疫检测、监测的需求,在对南非II型口蹄疫抗原表位分析及相关基因合成的基础上,进行融合蛋白pGEX—VP1-VP3的体外表达,采用柱上酶切方法制备VP1-VP3蛋白。将纯化VP1-VP3抗原包被96微孔板,分别优化抗原包被浓度、血清稀释度、酶标二抗稀释度,确定阴性临界值。经反复优化,建立的南非II型间接ELISA检测方法的最佳抗原包被浓度为6．4ug／ml,血清最佳稀释度为1：200,酶标二抗最佳稀释度为1：4000,阴性临界值（0D450）为0．562。检测样品判定标准为：OD450〉0．622为阳性,OD450〈0．502为阴性,0．502≤OD450≤0．622为可疑。特异性试验结果表明,所建立方法与其它血清型口蹄疫间无交叉反应。南非II型口蹄疫间接ELISA检测方法的建立为我国口岸口蹄疫检疫提供了新的查验方法。     

民和县布鲁氏菌病、结核病监测调查及防治措施

笔者等在2008年6月～2010年7月期间,对民和县10308头奶牛采用牛型结核分枝杆菌PPD皮内变态反应试验,检出阳性病牛54头,阳性率0.524%;采用布鲁氏菌病试管凝集反应试验（SAT）检测奶牛10308头,查处阳性血清23份,阳性率为0.223%;采用虎红平板法和布鲁氏菌病试管凝集反应试验（SAT）试验,检测黄牛1267头、绵羊2351只,结果全部为阴性;布病采用细菌学试验检测奶牛流产胎儿20头份、绵羊测流产胎儿20头份,全部为阴性。从监测调查来看民和县奶牛存在布鲁氏菌病和结核病。本文就＂两病＂监测调查、存在的隐患、问题和综合防治措施提出了自己的看法,并进行了比较深入的探讨。     

Seroepidemiological investigation of brucellosis in sheep abortions in Kars,Turkey

This study was undertaken to investigate the seroprevalence of brucellosis in unvaccinated sheep from the flocks having previous abortion cases in Kars and around, Turkey and to compare the efficacy of each serological test used. Four hundred serum samples collected from 16 different flocks of sheep having a history of abortions in Kars and its surrounding area in Turkey were examined for the presence of antibodies raised against Brucella using Rose Bengal Plate Test (RBPT), Serum Agglutination Test (SAT), Rivanol Agglutination Test (RAT) and Complement Fixation Test (CFT). All animals were unvaccinated against Brucella. Of the serum samples tested, 147 (%36.7), 142 (%35.5), 139 (%34.75) and 135 (%33.75) were found positive by SAT, RAT, RBPT and CFT, respectively. No statistically significant difference was found between the serological tests used (p > 0.05). It is concluded from this study that brucellosis continues to be an important problem for ovine abortions and poses a risk both for human and other animals in this area. Therefore, adequate intervention measures should be implemented to control and eradicate brucellosis. In addition, if conventional serological tests are used at least two tests, RPBT for screening and CFT for the confirmation of the positive samples are preferable, should be used in parallel for detection of brucellosis effectively. This study was summarized from M.Sc. thesis of Ozgur CELEBI.     

几种布鲁氏菌病血清学诊断方法的比较研究

疑似布病感染的牛场采集牛奶和全血进行细菌分离,采集血清用虎红平板凝集试验(RBT)、试管凝集试验(SAT)、iELISA、cELISA进行抗体检测;采集免疫牛场和部分免疫羊场血清430份进行国内4个厂家生产的RBT抗原比对实验,并且选择特异性最高厂家的RBT抗原与SAT、iELISA和cELISA同时进行抗体检测。结果表明4个厂家生产的RBT抗原检测结果的一致性较差,RBT和SAT与加拿大布病参考实验室提供的iELISA和cELISA试剂盒检测结果相比一致率较高,但前两者均有较高的假阳性和假阴性。通过对比试验得出:在布病检疫时可选择特异性好的RBT抗原进行初筛,阳性结果用iELISA或cELISA进行确诊。     

进境动物及动物产品传带SAT型口蹄疫的风险评估

SAT型口蹄疫(foot and mouth disease,FMD)已从传统流行区域非洲大陆传播至西亚、中东地区,对我国畜牧业发展构成了潜在威胁。为评估SAT型FMD跨境传入风险,采用定性评估方法,对进境动物及动物产品传带SAT型FMD的风险进行了综合评估。结果表明,从疫区进口相关动物及动物产品传入SAT型FMD的风险高,因此需采取严格的风险管理措施,将FMD传入风险降低至我国可接受的水平。