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通过调查我国已有的4种蜱伯氏疏螺旋体的感染情况,以进一步阐明莱姆病在中国的分布与流行状况。本研究通过筛选扩增伯氏疏螺旋体外膜蛋白A(OspA)基因片段的通用引物,获得1对特异性引物,优化反应条件后建立用于检测蜱体内伯氏疏螺旋体的PCR方法,其扩增片段大小为307 bp。该方法可检测出10 pg的阿氏疏螺旋体(Ba)、1 pg的伽氏疏螺旋体(Bg)和0.01 pg的狭义伯氏疏螺旋体(Bb)的3种不同基因型的伯氏疏螺旋体的OspA基因组DNA,表明其敏感性较好,适用于蜱感染伯氏疏螺旋体状况的调查。本研究从我国7个省采集到的667只蜱,进行伯氏疏螺旋体感染的流行病学调查,分类鉴定表明这些蜱分属革蜱属、血蜱属、牛蜱属和扇头蜱属。PCR检测所获数据表明它们的感染率分别为4%(10/264)、6%(11/137)、31.4%(59/185)和31% 相似文献
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莱姆病是由伯氏疏螺旋体引起的一种蜱传性人兽共患传染病。1977年美国医生A．C Sleere发现康涅狄格州莱姆镇流行的青少年关节炎是一种独立的疾病,并称为莱姆关节炎。1982年,昆虫学家Willy Burgdorfer从采自疫区的达敏硬蜱中发现和分离出莱姆病疏螺旋体。1984年Johnson根据其基因型和表型特征,认为该螺旋体是一个新种,命名为伯格多弗疏螺旋体。 相似文献
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莱姆病是由伯氏疏螺旋体引起的一种蜱传性人兽共患传染病。1977年美国医生A．C Sleere发现康涅狄格州莱姆镇流行的青少年关节炎是一种独立的疾病,并称为莱姆关节炎。1982年,昆虫学家Willy Burgdorfer从采自疫区的达敏硬蜱中发现和分离出莱姆病疏螺旋体。1984年Johnson根据其基因型和表型特征,认为该螺旋体是一个新种,命名为伯格多弗疏螺旋体。 相似文献
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莱姆病是由伯氏疏螺旋体引起的一种蜱传性人兽共患传染病.1977年美国医生A.C Sleere发现康涅狄格州莱姆镇流行的青少年关节炎是一种独立的疾病,并称为莱姆关节炎.1982年,昆虫学家Willy Burgdorfer从采自疫区的达敏硬蜱中发现和分离出莱姆病疏螺旋体. 相似文献
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1兔疏螺旋体病
疏螺旋体病亦称莱姆病,是由经蜱传播的伯氏疏螺旋体引起的一种自然疫源性人畜共患传染病。本病以叮咬性皮损、发热、心肌炎、脑炎和关节肿胀疼痛为特征。 相似文献
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新城疫病毒样颗粒已开发成一种高效递送外源蛋白的载体平台。本研究在小鼠模型中开展了嵌合布鲁菌BCSP31病毒样颗粒(BCSP31-cVLPs)免疫原性及其保护效力评价。体内试验数据表明,BCSP31-cVLPs能有效激活脾脏中树突状细胞,进而促进初始型CD3^+CD4^+ T的活化。ELISA法检测小鼠血清结果表明,BCSP31-cVLPs可刺激机体产生针对重组BCSP31蛋白的特异性抗体水平,且呈剂量依赖性。流式细胞术检测结果显示,BCSP31-cVLPs可激活T细胞并使其分化。攻毒结果表明,BCSP31-cVLPs具有与疫苗株M5相当的免疫保护效力。本研究为新型布鲁菌疫苗的研制提供了数据支撑,并扩展了新城疫病毒样颗粒疫苗载体平台的应用。 相似文献
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根据已有的伯氏疏螺旋体鞭毛基因序列,设计两条特异性引物,PCR扩增该基因,并获得基因全长序列,大小为1 008 bp。采用生物信息学技术,对所获得的伯氏疏螺旋体鞭毛基因序列和拟编码的蛋白序列进行分析,发现其编码336个氨基酸,编码蛋白的理论分子量为35.7 ku,等电点为5.53,具有多个抗原表位序列,其中编码主要抗原位点的片段位于中央区段,该中央区段还具有伯氏疏螺旋体种的保守性。伯氏疏螺旋体鞭毛基因中央区段编码蛋白既是主要的抗原位点又具有保守性,理论上可作为莱姆病的诊断抗原。本文为莱姆病的实验室诊断奠定基础。 相似文献
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Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
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. 相似文献
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Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
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. 相似文献
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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。 相似文献
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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。 相似文献
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