鸡白痢对种鸡场的危害及净化措施

鸡白痢杆菌病(简称鸡白痢)是由鸡白痢杆菌引起的各种龄期鸡均常发的传染病。由于鸡白痢杆菌可以通过卵巢、输卵管污染鸡蛋,所以对于种鸡场来说,此病危害性很大。1易感鸡群及其症状     

对鸡白痢病的新认识

正禽伤寒与鸡白痢这两个老病广泛产生于世界各个养鸡地区。对于鸡白痢来说,其是一种由鸡白痢沙门氏菌引起的传染性疾病,流行于世界各地,主要感染的品种为火鸡与雏鸡,但近年来无论是禽伤寒沙门氏菌还是鸡白痢沙门氏菌都广泛传播于各个阶段的鸡中,两者具有十分相同的传播特征和临床表现,由此两者也被统称为鸡白痢。故本文将对此种状况开展分析,意为鸡白痢的防治提供新方式。1鸡白痢的防治现状鸡白痢这种疾病早早地被发现     

鸡白痢的病因及综合防治

正鸡白痢是较为常见的一种鸡病,主要是由鸡白痢沙门氏菌感染所致,是养鸡场最常见的一种传染病。一般来讲,抵抗力稍差的雏鸡很容易患上鸡白痢,且患病之后的死亡率相对较高。如果鸡白痢无法得到及时、有效的控制,就会造成病鸡大量死亡,养殖人员经济效益受到影响,甚至影响我国食品安全。1鸡白痢的病因鸡白痢的病原是鸡白痢沙门氏杆菌,排泄物是病鸡感染的主要传染源,该病也可通过鸡蛋进行传播。不同日龄鸡的易感性存     

鸡白痢对种鸡场的危害及抗病育种展望

鸡白痢杆菌病(简称鸡白痢)是由鸡白痢杆菌引起的各种龄期鸡常发的传染病。由于鸡白痢杆菌可以通过卵巢、输卵管污染鸡蛋,所以对于种鸡场来说,此病危害性很大。     

贵州省部分规模化鸡场鸡白痢血清学调查

为了解贵州省规模化鸡场鸡白痢流行现状,2017—2019年选取31个规模化鸡场抽检1340份鸡血清样品,采用鸡白痢抗体平板凝集试验,结合鸡场生物安全措施及净化情况,开展了鸡白痢血清学调查。结果显示:鸡白痢平均场群阳性率为83.87%,个体阳性率为13.43%;商品场(15.24%)鸡白痢个体阳性率最高,与父母代鸡场差异显著(P=0.044);育成期(18.77%)个体阳性率高于产蛋期(11.83%),差异显著(P=0.002);不同饮水来源、不同饲养方式的鸡白痢个体阳性率间有差异,但不显著(P>0.05)。车辆人员进出场区时消毒、空舍消毒的鸡白痢个体阳性率较低,但不显著(P>0.05),消毒频率越高,阳性率越低;31个调查场点中,引种前开展疫病检测及采取鸡白痢净化控制措施的场点个体阳性率低于未开展净化的场点,差异极显著(P=0.001、<0.001);仅有32.26%(10/31)场点有意愿开展鸡白痢净化。结果表明:贵州省规模鸡场鸡白痢沙门氏菌感染较为普遍,污染面较广;其感染受场点类型、生长阶段影响较大,而受饲养方式和饮水来源影响较小。结果提示:鸡场实施鸡白痢净化时,可以着重考虑场点类型和生长阶段这两个因素;合理设置场点地理位置、加强场点消毒和开展鸡白痢净化,可显著降低鸡白痢流行率,因此应加强宣传,提高规模化鸡场的鸡白痢防控及净化意识,主动开展鸡白痢净化工作,以控制鸡白痢流行。     

我国鸡白痢沙门氏菌的流行情况及净化现状

鸡白痢是由白痢沙门氏菌引起鸡的一种常见传染病,可导致鸡的大批死亡,从而给养鸡业造成巨大的损失。本文介绍我国近年来鸡白痢的发生特点及危害、流行现状和检测方法等方面的研究现状,拟为指导鸡白痢净化防治工作提供指导。     

中草药治疗鸡白痢的试验

鸡白痢中成鸡白痢和雏鸡白痢是最为常见的病患,雏鸡白痢是造成雏鸡死亡、育雏成活率低的主要疾病之一,成鸡白痢是造成产蛋率不高和成年鸡死淘增加的主要原因之一。文章分组取鸡白痢感染鸡群,用中药禽瘟王和西药氟苯尼考分别治感染病例,取实验数据比较分析,临床用药高剂量禽瘟王治疗禽白痢为首选,可实现标本兼治的功效。     

种鸡场鸡白痢检查与净化

鸡白痢由鸡白痢沙门氏菌引起,各品种鸡均易感。     

鸡白痢与球虫混合感染的治疗

鸡白痢和鸡球虫病都是鸡的一种常见疾病,临床上以单纯患鸡白痢病居多。但近几年来,在我省一些个体养鸡场先后出现了鸡白痢与球虫病混合感染病症,其发病率和死亡率较高。     

竹丝鸡和PSF鸡人工感染鸡白痢沙门菌的抗体消长规律

本研究通过人工感染鸡白痢沙门菌到竹丝鸡和SPF鸡,采用血清平板凝集的方法检测鸡白痢抗体,用于确定鸡白痢抗体的消长规律。结果表明:不同品种间鸡性成熟时间具有差异,鸡白痢抗体高峰出现时间也不完全相同。在不同感染方式下鸡白痢抗体消长规律具有差异,腹腔注射组抗体产生最快,滴鼻组次之,同居感染组抗体产生最慢。     

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.     

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。     

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。     

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.     

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。     

RFLP和PCR-RFLP标记与牦牛遗传育种研究

在归纳总结RFLP和PCR-RFLP标记技术的原理、优缺点的基础上,系统论述了其在牦牛遗传育种研究中的应用现状,并提出了个人的建议和看法。     

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。