互助县牛羊流产原因初步调查

用琥红平板试验和间接血凝试验对498份牛血清分别进行了布鲁氏菌病、衣原体病和弓形虫病抗体检测,阳性率分别为0%,49.2%和6.6%;对1059份羊血清分别进行了布鲁氏菌病、衣原体病和弓形虫病抗体检测,阳性率分别为0%,37.1%和5.4%。结果表明,本次从牛羊血清样品中检出了较高的衣原体阳性率。     

青海省三角城种羊场部分流产母羊的血清学检测

应用布鲁氏菌病RBPT、衣原体和弓形虫IHA,对来自青海省三角城种羊场发生流产的23只生产母羊血清进行特异性血清抗体的检测,结果检出衣原体阳性血清3份,阳性率为13.04%:未检出布氏杆菌和弓形虫阳性血清。     

青海省湟中县某奶牛场奶牛流产病因的血清学调查和分析

用试管凝集法(SAT)、间接血凝抑制试验(IHA)和酶联免疫吸附试验(ELISA)三种方法,对来自青海省湟中县田家寨镇某奶牛场发生过流产群的95份奶牛血清,进行布氏杆菌病、衣原体病和弓形虫病的血清学调查。结果:检出布氏杆菌病阳性血清1份,衣原体阳性血清15份,弓形虫阳性血清2份,血清阳性率分别为1.05%、15.79%和2.11%。初步说明引起该牛场流产的病因为布氏杆菌病、衣原体病及弓形虫混合感染。     

青海省三角城种羊场部分种羊中流产类疾病的血清学检测

应用布鲁氏菌病RBPT(Rose-Bengal Plate Agglutination Test)、衣原体和弓形虫IHA(Indirect Hemagglutination Assay),对来自青海省三角城种羊场的59份试情公羊的血清、60份后备母羊的血清进行特异性血清抗体的检测。结果:在119份被检血清中,检出衣原体阳性血清3份,阳性率为2.52%,其中在59份试情公羊血清中检出3份,阳性率5.08%;在后备母羊的血清未检出衣原体阳性血清;所有的血清中均未检测到布氏杆菌和弓形虫阳性血清。     

门源县东西部地区牛羊衣原体病的血清学调查

应用衣原体间接血凝实验(IHA)对来自青海省门源县东部地区的200份牛血清、200份羊血清进行了衣原体间接血凝抗体试验的检测。结果检出:牛阳性血清16份,血清阳性率为8.0%;羊阳性血清35份,血清阳性率为17.5%;说明在该县东西部地区的牛羊群中存在衣原体病的感染。     

云南省红河州山羊流产病原的调查

针对红河州山羊妊娠期流产严重的现象，进行了流行病学调查、临床症状观察、病理学检查、实验室诊断、人工感染试验和治疗试验。结果发现，妊娠母山羊流产现象覆盖全州，且流产率以每年11．50％的速度递增，弓形虫抗体阳性率为30．82％(1210／3925)，衣原体抗体阳性率为32．31％(1268／3925)，其中弓形虫和衣原体双重感染阳性羊占9．35％(367／3925)，未检出布鲁氏菌抗体阳性羊；自流产胎儿肺抹片中发现弓形虫滋养体包囊，7份流产胎儿中有6份分离到衣原体；用土霉素及复方新诺明治疗有明显效果；人工感染试验能复制出与自然病例相同的病例模型。调查结果表明，红河州广泛流行的山羊妊娠期流产的病原是弓形虫、衣原体，2种病原单一感染或混合感染是造成流产的主要原因。     

2022年宁夏固原市肉用流产母牛病原血清学调查分析

[目的]为了明确宁夏固原地区肉用流产母牛4种流产相关病原的流行情况。[方法]试验选择宁夏固原市5个地区不同规模化肉牛养殖场,采集131份有流产史的母牛血清样品,采用酶联免疫吸附试验（ELISA）分别对流产相关病原抗体/抗原进行检测和分析。[结果]采集的131份血清样品中共检出109份阳性血清,阳性率为83.2%。其中BVDV抗体阳性率为62.6%（82/131）、流产衣原体抗体阳性率为59.5%（78/131）、IBRV抗体阳性率为13.7%（18/131）,布鲁氏菌抗体阳性率为0%（0/131）。结果表明,采集的131份血清样品中共检出109份阳性血清,阳性率为83.2%。其中BVDV抗体阳性率为62.6%（82/131）、流产衣原体抗体阳性率为59.5%（78/131）、IBRV抗体阳性率为13.7%（18/131）,布鲁氏菌抗体阳性率为0%（0/131）。109份阳性样品中,最多出现3种病原混合感染。其中单一病原感染阳性样品占42.2%（46/109）,以BVDV感染比例最大,与流产衣原体阳性率相比差异显著（P＜0.05）;2种病原混合感染样品占56.9%（62/109）,以BVDV和流产衣原体混合感染比例最大,与流产衣原体和IBRV混合感染阳性率、BVDV和IBRV混合感染阳性率差异极显著（P＜0.01）;3种病原混合感染样本占4.6％（4/109）,主要以BVDV、流产衣原体和IBRV混合感染为主。[结论]宁夏固原地区流产母牛均存在以上3种疫病感染,其中主要以BVDV和流产衣原体单独或混合感染为主。     

青海省海南州引进种牛布鲁氏菌、衣原体和弓形虫等病血清学检测

应用布鲁氏菌病虎红平板凝集试验、衣原体和弓形虫IHA试验,对青海省海南州某核心种牛群引进的40只种公牛,进行了布鲁氏菌、衣原体和弓形虫等病的特异性血清抗体检测。结果:检出布氏杆菌阳性血清1份,阳性率2.50%:检出衣原体阳性血清6份,阳性率为15.00%;弓形虫阳性血清2份,阳性率为5.00%。结果表明引进的种牛中存在不同程度的布鲁氏菌病、衣原体及弓形虫病。而该三种病均可通过垂直传播。所以,对种牛引进因加强检疫及管理等措施。防止种牛感染造成的疫病传播。     

贵州省7个地区主要山羊流产疫病的流行病学调查

为了解2011—2012年间贵州省山羊5种流产疫病的流行情况,采用虎红平板凝集试验(RBPT)、间接血凝试验(IHA)和酶联免疫吸附试验(ELISA)3种血清学方法对贵州省7个地(州、市)74个养殖场的514份山羊血清进行5种流产疫病抗体的血清学监测,并通过PCR方法对10个规模化养殖场流产死亡母羊子宫、胎儿、肺和肺门淋巴结组织进行羊流产亲衣原体病和山羊传染性胸膜炎的病原核酸进行检测。结果显示:布氏杆菌病、羊流产亲衣原体病、弓形虫病、蓝舌病、山羊传染性胸膜炎的丝状支原体山羊亚种和绵羊肺炎支原体血清抗体阳性率分别为0、1.26%、6.72%、26.95%、2.35%和6.79%;羊流产亲衣原体病、山羊传染性胸膜肺炎的丝状支原体山羊亚种和绵羊肺炎支原体病原核酸检测阳性率分别为0、0、10%。结果表明:目前除布氏杆菌病以外,其余4种山羊流产疫病均在贵州存在不同程度的流行。     

2019年广西柳州市羊布鲁氏菌病抗体监测与分析

为了解2019年广西柳州市羊布鲁氏菌病的流行情况,采集了该市各县区的90家规模养殖场与21家散养户的羊血清(分别为3074份和587份)进行血清学调查分析。检测结果表明,柳州市的3661份羊血清样品中存在2份为羊布鲁氏菌病抗体阳性,总体阳性率为0.05%,群体阳性率为0.9%(1/111)。规模养殖场的羊布鲁氏菌病抗体阳性率为0.00%(0/3074),群体阳性率为0.00%(0/90);散养户的羊布鲁氏菌病抗体阳性率为0.34%(2/587),群体阳性率为4.76%(1/21)。说明柳州市个别散养户的羊群中存在布鲁氏菌病,规模化养殖场的饲养管理工作与消毒防控工作做得比较好,需加强对散养户的防疫宣传及监测工作。     

云南建水地区2017-2019年牛羊布鲁氏菌病的流行病学调查分析

为了解建水地区近几年牛羊布鲁氏菌病的流行情况,采用虎红平板及试管凝集试验对2017-2019年期间采集的150份牛血清、450份羊血清进行检测,并对数据进行统计分析。结果显示,2017-2019年牛布鲁氏菌病的阳性率为0.67%,羊布鲁氏菌病的阳性率为0.22%。其中2017年牛羊布鲁氏菌病的阳性率均为0%;2018年牛羊布鲁氏菌病的阳性率均为0%;2019年牛羊布鲁氏菌病的阳性率分别为2%、0.67%。本研究为促进本地区畜牧业健康稳定发展、养殖户效益增收以及保障畜产品质量安全提供了参考依据。     

2016—2018年广西玉林市和百色市主要家畜疫病定点监测

为了解广西地区口蹄疫(FMD)、猪瘟(CSF)、猪繁殖与呼吸综合征(PRRS)、猪伪狂犬病(PR)、布鲁氏菌病和小反刍兽疫(PPR)等重大动物疫病的免疫动态、疫情流行风险,按照国家动物疫病定点监测实施方案相关要求,2016—2018年运用ELISA和实时荧光定量PCR方法,对玉林市和百色市20个定点监测场点的猪、牛、羊开展病原学监测和抗体监测。病原监测结果显示:2016—2018年,未在牛羊群中检出FMD、PPR病原;2016年和2017年CSF病原检出率均为0.38%;3年内均有PRRS病原检出,检出率介于1.89%~6.32%。抗体检测结果显示:2016—2018年,猪O型FMD、CSF、PRRS和PR-gB抗体阳性率均在70%以上,A型FMD抗体阳性率逐年上升,NSP抗体和PR-gE抗体阳性率呈波动状变化;牛O型FMD抗体阳性率分别为94.78%、18.26%、71.11%,亚洲I型分别为76.52%、25.22%、27.78%,NSP抗体阳性率在22.61%~41.74%之间波动;仅2016年检出1份牛布鲁氏菌抗体阳性;3年间,羊O型、亚洲I型FMD和PPR免疫抗体阳性率都很低,未达到70%,且呈下降趋势,NSP抗体阳性率在0.95%~7.62%之间波动,未检出羊布鲁氏菌抗体。结果表明,广西玉林市和百色市的猪群O型FMD、CSF、PRRS、PR免疫效果较好,但牛羊群FMD和PPR免疫效果较差,猪群中仍有CSF、PRRS、PR等疫病流行,牛羊群中存在FMD流行的风险,但牛羊布鲁氏菌病得到有效控制。结果提示,应继续加强上述疫病的免疫和监测,针对免疫效果较差、病原流行率偏高的疫病,要重点做好防控和净化。     

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 mixed methods study of ruminant brucellosis in central-eastern Tunisia

In this study, we conducted an investigation to determine the true prevalence of bovine and ovine brucellosis in central-eastern Tunisia. A total of 1134 veterinary samples taken from 130 ruminant herds were screened for brucellosis using IS711-based real-time PCR assay. Sera collected from the ruminants were tested using the Rose Bengal test and indirect enzyme-linked immunosorbent assay. Based on serological and molecular results, the true adjusted animal population level prevalence was 23.5 % in cattle, against 13.5 % in sheep. In addition, the true adjusted herd level prevalence of brucellosis was 55.6 % in cattle and 21.8 % in sheep. A statistically significant association was found between vaginal and milk shedding for ruminants. In addition, our results showed that Brucella abortus could be responsible for bovine and ovine brucellosis. Multivariable logistic regression analysis at the animal population level indicated that age and origin variables were important risk factors for cattle. However, age and abortion variables were found to be associated with ovine brucellosis. At the herd level, risk factors for Brucella positivity were as follows: abortion and herd composition for cattle against herd composition, mortality rates, and hygiene for sheep. Animal hygiene, food quality, and sanitary practices on the farm should be applied as strategies to control brucellosis in herds.     

宁夏固原市肉牛口蹄疫和布鲁氏菌病血清抗体检测与分析

[目的] 为了调查宁夏固原市肉牛口蹄疫和布鲁氏菌病的流行情况,[方法]通过采集74份不同月龄肉牛血清样本,采用酶联免疫吸附试验(ELISA)对2种疫病抗体进行检测和分析。[结果],抗体阳性率由高到低分别为A型口蹄疫(48.65%)、O型口蹄疫(43.24%)、布鲁氏菌病(12.16%)。混合抗体阳性率中主要以O型和A型口蹄疫混合抗体阳性率最高(58.54%)。O型口蹄疫在西吉县的阳性检出率最高(88.24%),彭阳县最低(6.67%);A型口蹄疫在西吉县阳性检出率最高(82.35%),彭阳县最低(26.67%);布鲁氏菌病在原州区阳性检出率最高(15.00%),泾源县和彭阳县未检出。从不同年龄来看,3种疫病均在＞12月龄的肉牛中阳性率最高,分别为O型口蹄疫69.23%、A型口蹄疫76.92%、布鲁氏菌病15.38%。[结论] 固原市各个县区肉牛养殖地区均出现2种病原感染的情况,以O型和A型口蹄疫混合感染为主。在肉母牛养殖过程中,应加强对以上病原的检疫并采取相应的防控措施。     

甘肃省家畜布鲁氏菌病防治回顾及现状分析

目的 对布鲁氏菌病流行历史和防控工作历史进行回顾,对疫情现状进行,分析并明确当前布鲁氏疾病的现状.方法 通过查阅历史资料和汇总分析实验室监测数据.结果 布鲁氏菌病阳性率牛为0.38％,羊为0.78％;结论 当前我省布鲁氏杆菌病发病以牛羊为主.羊阳性率呈明显上升趋势.     

三明地区牛群疫病的流行病学调查

用ELISA方法对三明市2016年随机抽取的牛群血清样品进行检测,检测内容包括牛病毒性腹泻、牛白血病、牛传染性鼻气管炎、牛布鲁氏菌病。本次调查共检测样品204份。其中检测规模场7个,样品116份;检测散养户14个,样品88份。结果表明：检测牛病毒性腹泻病毒血清204份,检出阳性血清65份;检测牛白血病血清188份,检出阳性血清34份;检测牛传染性鼻气管炎血清184份,检出阳性血清64份;检测牛布鲁氏菌病血清204份,检出阳性血清0份。说明三明地区牛群存在多种疫病感染,应采取相应的防控措施。     

Simple and rapid field tests for brucellosis in livestock

Four simple and rapid field tests for the serodiagnosis of brucellosis in cattle, goat, sheep and swine were developed. The performance of the assays was investigated using serum samples collected in Portugal from animals originating from herds with a defined sanitary status with respect to the presence of brucellosis. The sensitivity calculated for the bovine, caprine, ovine and swine Brucella lateral flow assays based on results obtained for samples collected from animals with culture confirmed brucellosis was 90%, 100%, 90% and 73%, respectively. None of the samples from animals from herds free of brucellosis reacted in the flow assays indicating a high specificity. However, as expected, some degree of reactivity was observed when testing selected serum samples that reacted non-specific in reference tests for brucellosis.     

Prevalence of antibodies to Brucella spp. and individual risk Factors of Infection in Traditional Cattle, Goats and Sheep Reared in Livestock–Wildlife Interface Areas of Zambia

A cross-sectional study was performed in the livestock–wildlife interface areas of Lochinvar and Blue Lagoon National Parks and the non-interface area of Kazungula to determine the prevalence of antibodies to Brucella spp. in domestic ruminants and identify individual animal risk factors of infection. A total of 1245 cattle from 124 herds and 280 goats and sheep from 29 flocks were tested sequentially for Brucella antibodies using the Rose Bengal test (RBT) and competitive ELISA. In cattle, individual seroprevalence ranged from 14.1% to 28.1%, while herd sero–prevalence ranged from 46.2% to 74.0% in the three study areas. No goat or sheep tested positive for Brucella antibodies. Three types of cattle grazing strategies were encountered: locally grazed herds (LGH), transhumantly grazed herds (TGH) and river flood plain grazed herds (FGH). Brucella seroprevalence was seen to vary according to area and grazing strategy: Lochinvar and transhumant grazed herds recorded the highest figures, respectively. Age, sex and history of abortion were found to have independent effects on individual seroprevalence. This study establishes that brucellosis is endemic in domestic animals in the livestock–wildlife interface areas of Blue Lagoon and Lochinvar national parks and the disease is also present in Kazungula. We observed that type of grazing strategy had significant impact on cattle Brucella seroprevalence and that transhumant herds were at high risk of being infected.     

青海省海西地区山羊和绵羊犬新孢子虫病的血清学调查

用犬新孢子虫的重组蛋白GST-NcSAG1t作为ELISA诊断抗原,进行了青海省海西地区山羊和绵羊群中犬新孢子虫病的血清学调查。经过对所收集的120份绵羊血清和531份山羊血清抗体的检测,共检出绵羊阳性血清10份,山羊阳性血清36份,其阳性率分别为8.33%和6.78%。说明青海省海西地区的绵羊和山羊群中存在犬新孢子虫的感染。