哈萨克绵羊DRB1基因外显子1和4多态性与布鲁氏菌病的相关性研究

试验旨在对哈萨克绵羊DRB1基因外显子1和4多态性与布鲁氏菌病的相关性进行研究。使用虎红平板凝集试验（RBPT）对试羊的血清进行血清学检测，参考GenBank中绵羊MHC ClassⅡ区DRB1基因序列（登录号：NC_040271.1），对其外显子1和4片段设计引物，采用PCR-SSCP和DNA测序技术对230只哈萨克绵羊的DRB1基因进行多态性检测，分析其多态位点与哈萨克绵羊布鲁氏菌易感性之间的关系。RBPT检测发现66只哈萨克绵羊为布鲁氏菌感染阳性，阳性检出率为28.7%。外显子1片段存在一个SNP位点（F1-G22A），测序确定两种基因型（GG、GA），优势等位基因和基因型分别为G、GG，F1-G22A多态位点的易感基因型为GA。卡方检验表明，哈萨克绵羊DRB1基因F1-G22A多态位点与布鲁氏菌易感性的相关性不显著（P>0.05）。通过生物信息学在线软件分析得出，F1-G22A多态位点导致了RNA二级结构的改变和最小自由能的降低，引起了蛋白质二级结构的改变。DRB1基因外显子4片段未发现SNPs。由此得出，哈萨克绵羊DRB1基因F1-G22A多态位点与布鲁氏菌易感性可能存在一定的相关性。     

Importance of brucellosis control programs of livestock on the improvement of one health

Brucellosis not only represents an important health restraint on livestock but also causes high economic losses in many developing countries worldwide. Despite considerable efforts made for the control of brucellosis, the disease is still spreading in many regions (such as the Middle East) where it represents one of the most important health hazards impacting both animals and humans. The present review aims to investigate the efficacy of veterinary control programs regarding brucellosis, with a special focus on current prevention, control, and eradication approaches. The reasons for unsuccessful control programs such as the absence of highly effective vaccines and non-certified bulls are also debated, to understand why the prevalence of brucellosis in livestock is not decreasing in many areas despite considerable efforts taken to date. The importance of governmental and regional investment in brucellosis control remains one of the main limiting factors owing to the limited budget allocated to tackle this disease. In this context, one health concept has generated novel comprehensive approaches with multiple economic implications across the livestock industry and public health. However, the implementation of such global preventive strategies appears to be a key issue for many endemic and low-income countries. According to the collected data, epidemiological contexts including management and trade systems along with well-defined agro-ecological zones should be evaluated in brucellosis endemic countries to improve milk production and to enhance the sustainability of the livestock sector at both national and regional levels.     

石林县山羊布氏杆菌病血清学检测

[目的]了解山羊布氏杆菌病在石林县的流行状况。[方法]通过虎红平板凝集试验和试管凝集试验于2006～2011年对石林县山羊血清进行布氏杆菌血清学检测。[结果]2006～2007年石林县山羊布氏杆菌阳性检出率较高,分别为3.41%和3.51%。2009～2011年石林县山羊布氏杆菌阳性检出率分别为0.50%、0.28%和0.38%。[结论]石林县属于山羊布病控制区。     

奶牛布鲁氏菌病检测与防制

对青海省大通县石山、良教、桥头、景阳、长宁、青林、朔北等奶牛养殖比较集中乡镇的5007头奶牛进行了奶牛"布鲁氏菌病"的检测,共检测出"布鲁氏菌病"阳性奶牛41头,阳性率为0.82%,对检出的阳性奶牛及时进行了扑杀和无害化处理,并提出了防制措施。     

基于系统多层次灰色关联熵的奶牛布鲁菌病风险评估

[目的]探究影响奶牛布鲁菌病风险评估的主要因素及其影响顺序。[方法]从饲养与调入、繁育、饲养环境、混养情况4个方面,设定了评价指标体系,选取3个有代表性的地区进行了调查,应用系统多层次灰色关联熵分析方法进行奶牛布鲁菌病风险评估。[结果]一级指标对奶牛布鲁菌病风险的影响顺序为:饲养与调入>饲养环境>混养情况>繁育;二级指标对奶牛布鲁菌病风险的影响顺序为:U32>U12>U11>U31>U21>U42>U43>U23>U22>U41;3个有代表性的地区奶牛布鲁菌病的风险水平为:A省份>B省份>C省份。[结论]该研究为合理评估不同地区的奶牛布鲁菌病风险水平提供了理论依据。     

犬猫布病的流行病学调查

为了解北京地区宠物布鲁氏杆菌病的流行情况。2011年1月-8月,在北京市27家大中型动物医院随机采取犬、猫血清样本600份,采取虎红平板凝集试验(RBPT)和试管凝集试验(SAT)相结合的方法进行布病牛羊型和犬型的血清学检测,结果表明,现北京部分地区已存在宠物犬猫血清阳性样本。     

牛布鲁氏菌病防控研究进展

近年来布鲁氏菌病的发病几率呈不断上升的流行趋势,不仅给畜牧业造成重大经济损失,而且严重威胁人类的健康。对牛布鲁氏菌病的病原、流行病学、国内外综合防控措施等方面进行了综述,以期为牛布鲁氏菌病的防控提供参考。     

Serologic Prevalence of Brucellosis in Horse Stables in Two Northern States of Nigeria

Despite the endemicity of brucellosis in Nigeria, reports on equine brucellosis are rare. The Rose Bengal Plate Test (RBPT) was used to determine the serologic prevalence of Brucella abortus antibodies amongst 75 horses from three stables in two States of northern Nigeria. The highest prevalence (22.7%) was recorded in stable C located in Plateau State and the lowest (6.7%) was found in stable B in Kaduna State. The overall prevalence determined was 14.7%. There is need for the inclusion of horses in brucellosis surveillance and control strategies in Nigeria to safeguard people at high risk.     

补体结合酶联免疫吸附试验方法的建立

为改进免疫学诊断技术的准确性,研究了一种基于补体结合的免疫学检测新技术———补体结合酶联免疫吸附试验（CF-ELISA）。CF-ELISA技术采用酶标记抗菊糖纯化豚鼠补体C3抗体及其酶显色系统作为补体参与反应的指示系统,用ELISA方法进行补体结合试验。经对布氏菌病抗体检测的初步试验结果显示,CF-ELISA技术可检测到0.01 IU的布氏菌病抗体,灵敏度与间接酶联免疫吸附试验（iELISA）相当,是虎红平板凝集试验（RBPT）试管凝集试验（SAT）的5 000倍、补体结合试验（CFT）的10 000倍。对349份确诊布氏菌病感染群牛、羊血清的检测结果显示,CF-ELISAi、ELISA、CFT、SAT、RBPT的阳性率分别为35.82%3、6.39%、31.81%、30.09%、36.1%,CF-ELISA与iELISA、CFT、SAT、RBPT的阳性符合率分别为：98.4%、88.8%、80.0%、90.6%。CF-ELISAi、ELISA、CFT、SAT、RBPT对490份布氏菌病阴性群牛、羊血清的阴性率分别为100%、99.6%、100%、99.4%、99.8%,CF-ELISA与iELISA、CFT、SAT、RBPT的阴性符合率分别为：99.6%1、00%、99.4%、99.8%。研究表明,CF-ELISA是具有高特异性和高敏感性的布氏菌病免疫学检测技术。     

Brucella suis in three dogs: presentation,diagnosis and clinical management

Brucella suis is an emerging, zoonotic disease predominantly affecting dogs and humans that engage in feral pig hunting in Australia and other countries. Although B. suis infection in dogs shares some clinical similarities to the host-adapted species (B. canis), B. suis remains an incompletely understood pathogen in dogs with limited published data on its pathogenesis and clinical features. This case series describes the presentations, diagnosis, and clinical management of B. suis infection in three dogs: (1) a bitch with dystocia, abortion and mastitis; (2) an entire male dog with septic arthritis and presumptive osteomyelitis; and (3) a castrated male dog with lymphadenitis. Unique features of these cases are reported including the first documented detection of B. suis from milk and isolation from lymph nodes of canine patients, as well as the follow-up of pups born to a B. suis-infected bitch. Consistent with previous reports, all three dogs showed a favourable clinical response to combination antibiotic therapy with rifampicin and doxycycline. Individually tailored drug regimens were required based on the clinical presentation and other factors, including owner expectations and compliance with therapy as well as a zoonotic risk assessment (generally considered low, except around time of whelping). The authors include their recommendations for the clinical management of dogs that are at-risk or seropositive for B. suis with or without clinical signs or laboratory-confirmed infection.