猪蓝耳病的特点与防制

近年来,由于猪蓝耳病的出现,给许多猪场带来了很大麻烦,猪只非常之难养,疾病相比以前复杂很多了,现笔者将猪蓝耳病的特点与防制进行分析和探讨,供养猪同行参考。1猪蓝耳病的特点1.1病原猪蓝耳病病原为猪蓝耳病毒,其分为美洲型和欧洲型。我国猪场多数为美洲型。病猪和带毒猪是本病的传染源,大多数感染猪可长期带毒,如感染公猪精液中的带毒期1～3个月不等,病毒在康复猪体内可留存6个月以上,并可随鼻分泌物,粪     

2006年夏江西蓝耳病流行毒株的分离及初步鉴定

2006年9月,江西省某猪场发生疫病,发病率为95%以上,死亡率高达70%。通过Marc-145细胞盲传,从该场病死猪脑和肺脏中分离到美洲型蓝耳病病毒,该蓝耳病分离毒株的ORF7核苷酸序列与其他6个发病猪场的蓝耳病病毒的同源性为99%以上,与美洲型蓝耳病标准毒株VR-2332的同源性为93.3%。根据流行病学调查、临床症状、病理变化和病原学检测结果,可以推断该场本次疫病的病原为美洲型蓝耳病病毒变异毒株,且与其他猪场流行的蓝耳病病毒应为同一流行毒株。     

当前猪蓝耳病的流行特点与综合防控

1当前猪蓝耳病的流行特点 当前猪蓝耳病的流行有六大特点：一是目前仍以高致病性猪蓝耳病流行为主（也有经典型蓝耳病）,已成为严重危害养猪生产的重大疫病,许多猪场都存在感染和带毒的问题。     

美洲型猪蓝耳病病毒高致病性变异株RT-LAMP检测方法的建立

设计两套反转录-环介导等温扩增(RT-LAMP)引物,建立了检测美洲型猪蓝耳病病毒及其高致病性变异株的RT-LAMP方法。采用RT-LAMP方法与实时荧光RT-PCR方法检测58份病料,结果一致,但RT-LAMP方法的灵敏度大约高出10倍。RT-LAMP方法特异性良好,检测猪瘟、伪狂犬病和细小病毒等均未出现交叉反应。结果表明,建立的美洲型猪蓝耳病病毒及其高致病性变异株RT-LAMP检测方法具有特异、灵敏、高效和简便的特点,在我国猪蓝耳病快速检测领域将有广阔的应用前景。     

猪蓝耳病灭活苗的临床使用效果评估

通过观察临床上2个猪蓝耳病发病猪场使用猪蓝耳病灭活疫苗后的防控效果,初步得出结论如下:猪蓝耳病灭活疫苗免疫猪群后发病率和死亡率低于对照组,有助于改善猪蓝耳病活跃猪场的生产成绩。     

2020年猪场临床主要猪病检测分析与防控建议

2020年齐鲁合作的第三方实验室对猪场送检的样品进行抗原、抗体检测,其中病毒性疾病以猪蓝耳病、猪流行性腹泻、猪圆环病毒2型感染、猪圆环病毒3型感染检出率比较高;而抗体检测结果以伪狂犬病gB抗体、猪圆环病毒2型抗体、猪瘟抗体相对比较理想。但各种疾病表现不同的特点。综合抗原、抗体检测结果看,猪蓝耳病、猪流行性腹泻、猪圆环病毒2型感染、猪伪狂犬病防控相对较差,猪场还是需要查漏补缺,提升群体健康度。     

2010年猪群疫病流行动态分析报告及2011年猪群疫病流行动态预测

<正>12010年猪群疫病调查、检测结果1.12010年部分规模猪场发病猪群组织样品病原学检测结果(见表1)表1显示,各地区猪场发病猪群主要感染猪瘟病毒、猪蓝耳病病毒、圆环病毒2型。1.2规模猪场猪群疫病流行病学调查结果(见表2)由表2的调查结果中可以看出:在规模猪场中,以蓝耳病和圆环病毒2型为主。     

猪场猪蓝耳病感染状态的国内外评估

猪蓝耳病是由猪繁殖与呼吸障碍综合征病毒引起的一种高度接触性传染病,各种年龄段的猪均可感染,以引起妊娠母猪发生繁殖障碍和仔猪出现呼吸道疾病为主要症状。猪蓝耳病自1987年在美国首次发现后,随着各国之间种源交流等方式迅速在全球养猪业扩散开来,我国于1995年因从国外引种而输入该病。时至今日,猪蓝耳病仍然是严重危害世界各地养猪业的重点疫病之一,很多猪场存在猪蓝耳病病毒感染缠绵难退且不时暴发流行的情况。为了有针对性地做好以猪场为单元的猪蓝耳病防控工作,国内外研究制定了猪场猪蓝耳病感染状态评估分类,为猪场猪蓝耳病动态防控提供参考。     

一例猪蓝耳病与猪圆环病毒病混合感染的诊断报告

2019年河南某猪场暴发了一起以仔猪消瘦,大批死亡为特征的传染病。为了确定致病病原,研究团队对患病猪场进行了流行病学调查,根据临床症状和病理剖检确定了疑似病原,再通过对猪瘟病毒(CSFV)、猪伪狂犬病毒(PRV)、高致病性猪蓝耳病病毒(PRRSV)、猪圆环病毒2型(PCV2)4种疑似病原进行PCR和RT-PCR实验室诊断,最终确诊为猪蓝耳病病毒与猪圆环病毒2型的混合感染。     

猪蓝耳病的防治措施

为帮助中小规模猪场做好猪蓝耳病防治工作,文章对猪蓝耳病的发病特点、临床表现进行阐述,提出了加强饲养管理、加强消毒、严格按程序免疫接种和"强体、调理、抗菌消毒"的防治措施。     

Disease and destiny-mystery and mastery

When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures.     

奶牛肢蹄病及其防治

简介常见奶牛肢蹄病种类及其症状,从日粮营养、运动场地面结构、环境卫生、饲养管理、遗传育种、疾病管理等方面简析奶牛肢蹄病的病因,并提出相应的预防措施。     

Foot and mouth disease and bluetongue: differences and similarities

On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures.     

畜禽物种多样性及其保护和利用

文章就我国畜禽物种多样性资源的现状、保护和利用等方面进行阐述,为生态脆弱的喀斯特地区畜牧业可持续发展提供参考。     

马的咽气癖及其防制措施研究进展

在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。     

德国荷兰畜禽产品质量安全交流与启示

2018年岁末,笔者有幸赴德国和荷兰,就畜产品质量安全控制及检测技术等进行了短期交流,收获颇丰,现具体介绍如下。一、交流情况德国面积35.73万平方千米,人口约8175.2万,是欧盟人口最多的国家,农业发达,机械化程度很高。德国的畜牧业以猪、牛、羊和禽类为主,畜牧业产值占农业生产总值的61%。德国虽然农业比重很小,但却是有机农业运动最早的发起国,也是目前世界上有机农产品生产与消费大国。     

广西芒果主要病虫害及其防治

广西是我国主要的芒果生产基地。随着基地建设的发展,芒果病虫害已成为目前栽培管理的主要问题。为此,在调查、研究的基础了介绍了当前芒果生产中常见的病虫害,并提出了防治措施,以期为生产上提供技术参考。     

国内外蛋氨酸与赖氨酸市场分析与展望

近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2％的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。