民和县奶牛布鲁氏菌病的血清学调查

为了解青海省民和县奶牛布鲁氏菌病分布和流行动态,制定有效的防治计划和措施,净化布鲁氏菌病,对来自12个乡镇的13308份奶牛血清采用试管凝集反应试验(SAT)进行了血清学检测,检出阳性血清59份,阳性率为0.443%,表明青海民和地区存在奶牛布鲁氏菌的感染。     

宁夏银川市部分奶牛场布鲁氏菌病的血清学调查

为了解银川地区奶牛布鲁氏杆菌病的流行情况,采用平板和试管凝集试验对591份奶牛血清进行了检测。结果表明：被检牛只患布鲁氏菌病的有13头,平均阳性率为2．20％（13／591）,其中规模养殖场、小型养殖场及农户饲养奶牛的布鲁氏菌病的阳性血清数分别为4份、3份、6份,阳性率分别为1．09％、2．44％和5．88％。此外,对某牛场近3年布鲁氏菌病流行情况分析结果表明：该场奶牛布鲁氏菌病的发生呈下降的趋势。针对此次调查结果,分析了奶牛布鲁氏菌病的发病原因,并提出了相应的防制措施。     

青海海西州地区牛羊布鲁菌氏病监测方案的研究

目的探索适合青海省海西州地区牛、羊布鲁氏菌病的监测方案,净化布鲁氏菌病.利用琥红平板凝集试验(RBPT)、全乳环状试验(MRT)和试管凝集试验(SAT)对1200份牛血清中376份奶牛血清、677份羊血清,以及376份牛奶进行检测.结果RBPT检测1200份牛血清中9份可疑,3份阳性;376份奶牛血清中3份可疑,1份阳性;其他牛6份可疑,2份阳性;677份羊血清中3份可疑.MRT检测376份奶样中5份可疑,1份阳性.SAT重复检测的20份血清中2份为阳性,RBPT与MRT结果的符合率为100%.结论三种检测方法的联合使用适合大样本的进行布鲁氏菌病的监测,为基层布鲁氏菌病的监测方案的研究提供了理论依据.     

青藏高原规模奶牛养殖场“两病”调查报告

为了解青藏高原规模奶牛养殖场奶牛"两病"的感染情况,笔者采集了湟源县7个规模奶牛养殖场的奶牛血清800份,使用试管凝集实验进行布鲁氏菌病检测,检出阳性样本2份。对抽检血清的800头奶牛进行牛型结核分枝杆菌PPD皮内变态反应检测,结果均为阴性。     

2017～2020年徐州地区部分奶牛场布鲁氏菌病监测

为了解江苏徐州市奶牛布鲁氏菌病的分布及流行趋势,采用虎红平板凝集试验(RBT)初步筛选,试管凝集试验(SAT)进行复核的方法对徐州市辖区内主要奶牛养殖场群及部分散养户持续4年进行布鲁氏菌病的监测。累计监测244个奶牛场群,共计血清样品47666份。结果显示,布鲁氏菌病个体平均阳性率为0.13%;群体平均阳性率为2.87%。随着奶牛养殖呈逐年集约化发展,布鲁氏菌病的分布也逐步向少数重点场群呈集中趋势。     

共和县布鲁氏菌病的血清学调查

<正>应用虎红平板凝集试验(RBT)和试管凝集试验(SAT),2008~2016年间对共和县4个半农半牧乡镇的9000份奶牛血清,进行布鲁氏菌病检测,检出阳性血清15份,阳性率0.116%,结果表明共和县奶牛布鲁氏病在近几年得到了有效控制。布鲁氏菌病(以下简称布病),是由布氏杆菌感染引起     

共和县布鲁氏菌病的血清学调查

2008-2013年间,应用虎红平板凝集试验（RBT）和试管凝集试验（SAT）对共和县奶牛累计检测布鲁氏菌病的血清7004份,检出阳性血清15份,阳性率0.21%,结果表明共和地区奶牛布鲁氏病得到有效控制。布鲁氏菌病（简称布病）,是由布氏杆菌感染引起的慢性接触性人畜共患的传染病,其特征是妊娠母畜发生流产,公畜呈现睾丸炎。该病可造成奶牛不同程度流产,生产性能下降,     

共和县布鲁氏菌病的血清学调查

2008—2013年间,应用虎红平板凝集试验(RBT)和试管凝集试验(SAT)对共和县4个半农半牧乡镇的8004份奶牛血清,进行布鲁氏菌病检测,检出阳性血清15份,阳性率0.19%,结果表明共和县奶牛布鲁氏病得到有效控制。     

甘肃省永靖县奶牛布鲁氏菌病监测与病原分离鉴定

为查明甘肃省永靖县奶牛布鲁氏菌病流行情况、感染菌种和类型,2013—2017年对永靖县8月龄以上奶牛进行了布鲁氏菌病监测,对2016年检出的3份疑似感染布鲁氏菌奶牛的脾脏进行了病原分离与鉴定。结果显示:2013—2014年检测奶牛444头,未检出阳性;2015—2016年检测奶牛706头,检出阳性63头,个体阳性率为8.92%;3份脾脏样本均为布鲁氏菌PCR检测阳性,细菌分离培养15 d,只有1份生长菌落;将分离菌株用AMOS-PCR进行检测,获得流产布鲁氏菌特征的扩增条带,且分离菌株的omp25基因测序结果与流产布鲁氏菌高度吻合。本监测和细菌分离鉴定结果为该地布鲁氏菌病防控提供了技术支撑。     

锦州地区奶牛布鲁氏菌的分离鉴定

[目的]为了查明锦州地区奶牛布鲁氏菌病的流行现状。[方法]对锦州地区两家奶牛场所采集的126份血清进行试管凝集试验(SAT)检测。[结果]表明阳性率分别为31.6%、27.4%,平均为29.5%,然后再采集阳性牛的全血15份和奶样71份,进行病原分离与鉴定,共得到7株布鲁氏菌。[结论]布鲁氏菌病应当引起足够重视。     

小尾寒羊犬新孢子虫病血清学诊断

应用酶联免疫吸附实验,对民和县引进小尾寒羊224份血清样品进行了犬新孢子虫病的检测。结果,被检的224份血清中,检出犬新孢子虫抗体阳性血清16份,阳性率分别为7.14%。表明引入青海省的小尾寒羊中存在犬新孢子虫病。     

Seroprevalence and associated risk factors of bovine brucellosis in Addis Ababa dairy farms

A cross-sectional study was carried out on bovine brucellosis in Addis Ababa dairy farms from November 2003 to April 2004. A total of 1,202 blood samples were collected from non-vaccinated, cross-bred dairy cattle. The Rose Bengal plate test (RBPT) was used as a screening test. Those serum samples reacting positively to RBPT were subjected to the complement fixation test (CFT) for confirmation. The RBPT detected 30 of 1,202 (2.5%) of the samples as brucellosis positive. The positive sera when further retested using CFT, 18 out of the 30 RBPT positive sera were confirmed to be positive. The prevalence of brucellosis based on CFT in the study area was 1.5%, and all positive sera were from female cattle. Result of the questionnaire survey revealed that percentage of 4.4% abortion and 9.5% retained fetal membranes. Abortion and retained fetal membranes were associated with Brucella antibodies (P?相似文献   

Use of the brucellosis card test for screening cattle in Saskatchewan.

One group of 28,714 bovine sera were tested by both the brucellosis tube serum agglutination test and the brucellosis card test. The tube serum agglutination test confirmed 99.8% of the negative brucellosis card test results. The brucellosis card test identified 63% of the tube serum agglutination test reactors. In a second group of 496 sera reacting to either the tube serum agglutination test, complement fixation test, plate serum agglutination test or acid antigen serum agglutination test the brucellosis card test identified 99.1% of the complement fixation test positive sera and 91.3% of the sera reacting to any of the other serological tests. The brucellosis card test showed satisfactory agreement with both the complement fixation test and tube serum agglutination test. It appears to be a useful screening test in operations involving large numbers of animals since under these conditions the reactors can be quickly identified and isolated.     

The ELISA for the examination of hare sera for anti-Brucella antibodies

Hare brucellosis is caused primarily by Brucella suis biovar 2. Hares along with wild boars are the natural reservoir of this microorganism. In view of restriction of applicability of traditional serological methods the work aimed to develop the ELISA to examine hare sera for the presence of anti-Brucella antibodies. Lipopolysaccharide (LPS) antigen obtained from the strain S19 of Brucella abortus and the conjugate of antibodies against rabbit immunoglobulin with horseradish peroxidase were used in the test. Hares' sera positive and negative in the CFT were used as controls of the ELISA. The sera collected from 9 hares suspected to be infected with Brucella organisms, positive in CFT (in this number 7 hares revealed clinical symptoms or anathomopathological lesions characteristic of brucellosis), 6 sera from hares showing no symptoms of the disease, negative in CFT and 520 sera from hares monitored for brucellosis were tested. All serum samples from hares suspected for Brucella infection were positive in ELISA and 2 of them were negative in RBPT. Additionally among the samples from hares monitored 12 sera were positive in ELISA and CFT, whereas 9 sera from 12 ones were also positive in the RBPT. The obtained results indicated that the ELISA developed in our laboratory proved to be equivalent in specificity to CFT. In addition, ELISA proved to be more sensitive than RBPT for the diagnosis of Brucella infection in hares.     

青海省海南州1958年-2008年布鲁菌病监测分析

为准确掌握青海省海南州布鲁菌病的防控状况,通过血清学、细菌学等检测方法,对海南州人畜间布鲁菌病进行多年监测.结果表明,1958年-1983年,牛羊的平均阳性率为4.05%.1983年牛羊阳性率分别为5.77%、3.89%,1994年下降为0.45%、0.43%.1995年-2003年,用试管凝集试验抽检,牛的平均阳性率为0.065%(11/16 909),羊的平均阳性率为0.038%(12/31 744).2005年-2008年间,只有2007年共和县检出阳性羊1只(1/50),2008年,同德、贵南县分别检出阳性牛1头(1/50)(1/350),表明海南州布鲁菌病的防控质量达到了国家规定的"稳定控制区"标准.     

Experience with simple ELISA test systems for Brucella serology in cattle, sheep and goats

The objective of this work was to use the ELISA technique for the serological surveillance for freedom of brucellosis of cattle, sheep and goats. By comparing 28 cattle sera taken after a brucellosis outbreak, 15 bovine sera supplied by the Federal Institute for Health Protection of Consumers and Veterinary Medicine (BgVV) and 497 serum slow agglutination test (SSAT) and complement fixation test (CFT) negative bovine sera from herds officially declared free of brucellosis, the ELISA technique not only shows higher sensitivity as compared to SSAT and CFT but also distinguishes clearly between positive and negative reactions. The serological comparison by SSAT, CFT and ELISA of 615 cattle, 624 sheep and 630 goat sera from herds acknowledged as brucellosis free showed equivalent specificities for both CFT and ELISA. The specificity of the SSAT was much lower, 81.1% in cattle and 96.2% in goat sera. The examination of 5796 cattle, 1337 calf, 5031 sheep and 1796 goat sera demonstrates the advantage of the ELISA technique as routine method. The possible application of the ELISA technique as a screening method for serological brucellosis tests in sheep, goats and possibly also in pigs is discussed.     

A screening ELISA for brucellosis in reindeer

An enzyme-linked immunosorbent assay (ELISA) for the screening of brucellosis in reindeer was developed. The assay, which utilizes s-LPS from Brucella abortus as antigen and biotin-labelled rabbit antibody to reindeer immunoglobulin as detecting antibody, has a high specificity and sensitivity, as indicated in a validation with sera from reindeer cultured positive for Brucella suis biovar 4 and sera from reindeer free of brucellosis.     

青海地区丝状支原体山羊亚种的流行病学调查

为弄清楚丝状支原体山羊亚种在青海省地区的流行状况,笔者利用丝状支原体山羊亚种抗体检测正向间接血凝试剂盒对2007至2009年采自青海各地区的1200份山羊血清进行了检测。结果显示,平均阳性率为16.08%。不同地区山羊血清的阳性率从5%-20.9%不等。从季节上看,冬春季节发病率要高于夏秋季节。结果提示青海地区的丝状支原体山羊亚种的感染率偏高,应该加强对由丝状支原体山羊亚种的防控。     

呼伦贝尔地区绵羊布鲁菌病血清抗体调查

通过对临床血清样本布鲁菌抗体检测,调查呼伦贝尔地区绵羊布鲁菌病发生与流行情况.应用虎红平板凝集试验对906份绵羊血清进行了布鲁菌血清抗体检测,结果羔羊、基础母羊和商品羊的抗体阳性率分剐为5.28%、5.68%和4.22%,总的抗体阳性率为4.86%.     

Characterization of the main immunogenic proteins in Brucella infection for their application in diagnosis of brucellosis

Brucellosis is an important zoonotic bacterial disease widespread in the world. The key step of control this disease is accurate diagnosis and elimination of diseased animals. The classic diagnostic methods, such as tube agglutination test, are inaccurate and nonspecific, because of cross-reaction with Yersinia enterocolitica serotype O:9. Previously, several proteins were reported as Brucella main immunogens. In this study, we used animal infection model to evaluate antibody production against OMP16, BP26, BLS, BCSP31, VirB12, SodC and GroEL proteins and investigated their application in diagnosis of brucellosis. The results showed that the BP26 and BLS are two best immunogenic proteins. In further study, we detected 44 clinical bovine sera using western blot, showing that the BP26 and BLS reacted with 30 Brucella-positive sera, but false-positive results were also shown in 14 Brucella-free sera. In an indirect ELISA assay, compared to lipopolysaccharide-based ELISA, the conformance of the BP26-based ELISA was 92.68 % in Brucella-positive sera, but only 52.94 % in Brucella-free sera. The BLS-based ELISA can hardly differentiate positive sera from negative sera. Besides, truncated fragments of the BP26 protein cannot exclude false-positive results in detection of Brucella-free sera. Altogether, although Brucella main immunogenic proteins have good reaction with Brucella-positive sera, false-positive reaction with Brucella-free sera may lead to misdiagnosis of brucellosis, suggesting that it should be more careful to use these immunogenic proteins as antigen targets to diagnosis of brucellosis.