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<正>流感流行现状野鸟在禽流感传播中起到了重要作用,特别是迁徙的水禽是目前公认的世界范围内流感爆发和流行的重要传染源。调查及研究结果表明,禽流感的分布明显受饲养模式和饲养环境、水禽的分布、野禽的迁栖路线和季节等因素影响。我国地域较大,有三条世界性的候鸟迁徙路线经过,给我国防控禽流感带来了较大的压力。H5亚型禽流感依旧是2.3.4.4分支的病毒为主,属于高致病性,死亡率较高。H9亚型禽流感临床表现形式多样,对鸡表现为低致病性,虽有不同小的分支,但 相似文献
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<正>编者按:H7N9来势汹汹,令许多家禽养殖企业措手不及,备受煎熬,许多种禽企业和规模养鸡场为此而付出沉重代价。该事件对家禽业造成的影响到底有多大?此次事件对家禽业来说是"机遇"还是"危机"?会不会推动家禽产业重组,加快饲养模式的转变?家禽业后期行情走势如何?继本刊上期推出《走近H7N9》专题报道之后,本刊记者再次深入一线进行市场调研。同时邀请了多位权威专家和行业精英人士,就H7N9给我国家禽业所带来的影响及对策展开广泛探讨,和你一起共谋未来家禽业发展大计…… 相似文献
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李海燕 《畜牧兽医科技信息》2003,19(7):43
猪流感(SI)是由猪流感病毒(SIV)引起的一种急性、高度接触传染性的群发性猪呼吸道疾病,是猪的主要免疫抑制病之一;临床以突发、高热、咳嗽、呼吸困难、衰竭为特征,发病率高达100%,该病一旦发生,传播迅速,可直接引起患猪死亡,引起妊娠母猪流产或产弱仔,并使患猪生产性能下降,肉料比降低,在集约化养猪场中普遍存在,难以根除,对养猪业危害极大.H1N1和H3N2的协同流行,使疫情加重,同时极易协同发生猪呼吸-繁殖障碍综合征、猪伪狂犬病、猪呼吸道冠状病毒、猪传染性胸膜肺炎、猪传染性萎缩性鼻炎、猪巴氏杆菌病、猪2型链球菌及猪肺炎支原体的感染,猪流感症状减缓或消除,猪体表现出猪呼吸-繁殖障碍综合征、猪肺炎支原体等典型症状,使病情复杂而反复,直接影响猪群健康状态和猪的质量,经济损失无法估量.…… 相似文献
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Marti E Gerber V Wilson AD Lavoie JP Horohov D Crameri R Lunn DP Antczak D Björnsdóttir S Björnsdóttir TS Cunningham F Dérer M Frey R Hamza E Horin P Heimann M Kolm-Stark G Olafsdóttir G Ramery E Russell C Schaffartzik A Svansson V Torsteinsdóttir S Wagner B 《Veterinary immunology and immunopathology》2008,126(3-4):351-361
Allergic diseases occur in most mammals, although some species such as humans, dogs and horses seem to be more prone to develop allergies than others. In horses, insect bite hypersensitivity (IBH), an allergic dermatitis caused by bites of midges, and recurrent airway obstruction (RAO), a hyperreactivity to stable born dust and allergens, are the two most prevalent allergic diseases. Allergic diseases involve the interaction of three major factors: (i) genetic constitution, (ii) exposure to allergens, and (iii) a dysregulation of the immune response determined by (i) and (ii). However, other environmental factors such as infectious diseases, contact with endotoxin and degree of infestation with endoparasites have been shown to influence the prevalence of allergic diseases in humans. How these factors may impact upon allergic disease in the horse is unknown at this time. The 3rd workshop on Allergic Diseases of the Horse, with major sponsorship from the Havemeyer Foundation, was held in Hólar, Iceland, in June 2007 and focussed on immunological and genetic aspects of IBH and RAO. This particular venue was chosen because of the prevalence of IBH in exported Icelandic horses. The incidence of IBH is significantly different between Icelandic horses born in Europe or North America and those born in Iceland and exported as adults. Although the genetic factors and allergens are the same, exported adult horses show a greater incidence of IBH. This suggests that environmental or epigenetic factors may contribute to this response. This report summarizes the present state of knowledge and summarizes important issues discussed at the workshop. 相似文献
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《中国兽药杂志》2004,38(5):67-67
据“中央社”发自日内瓦的消息说,世界卫生组织(WHO)已发展出H5N1禽流感原型病毒,但由于禽流感疫情趋缓,人类恐惧降低,药厂对大量生产疫苗意愿不高,到目前为止,只有三个实验室向WHO提出申请。WHO表示,他们运用”反转录媒”方式发展出H5N1原型病毒,目前只有三家实验室申请,美国医药界在“国家卫生院(NIH)”支持下,将进行临床试验。今年初H5N1高病原性禽流感疫情严重时,卫生专家忧虑这是全球性流行性感冒的前奏,WHO并全力加速研发疫苗的工作,当时有超过十家大药厂对生产疫苗表达了高度兴趣。生产预防大流行的疫苗,过程冗长,在WHO发… 相似文献
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本刊11月18日讯:卫生部11月17日晚转发香港卫生署通报.香港17日发现一例人感染高致病性禽流感病例。 相似文献
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Tropical Animal Health and Production - 相似文献
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Mehrabadi Mohammad Hosein Fallah Bahonar Alireza Mirzaei Kamran Molouki Aidin Ghalyanchilangeroudi Arash Ghafouri Seyed Ali Tehrani Farshad Lim Swee Hua Erin 《Tropical animal health and production》2018,50(3):677-682
Tropical Animal Health and Production - Avian influenza virus (AIV) H9N2 subtype is endemic in Iran and causes substantial economic loss to the growing poultry industry within the country. In this... 相似文献
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Hardwick Laura J. A. Kortum Andre J. Constantino-Casas Fernando Watson Penny J. 《Veterinary research communications》2021,45(1):21-30
Veterinary Research Communications - Cellular senescence is a molecular hallmark of ageing that is associated with multiple pathologies, and DNA damage marker γH2AX, together with cell cycle... 相似文献
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高致病性禽流感在非洲的蔓延给了我们有关这一具有极大威胁的疾病及其防制的若干宝贵教训。 相似文献