共查询到20条相似文献，搜索用时 313 毫秒
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用百病消治疗肉仔鸡慢性呼吸道病与大肠杆菌病混合感染效果好■李文春（辽宁省昌图县宝力镇肉鸡技术服务站１１２５３６）一、流行情况：鸡慢性呼吸道病又被称之为鸡霉形体病，一年四季均可发生。本病发病率较高，蔓延范围较广，特别是大群鸡场中更易流行。在肉仔鸡整个生... 相似文献
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张金龙 《畜牧兽医科技信息》2003,(1)
江苏某鸡场内呼吸道病十分严重,用现有的疫苗难以控制,扬州大学畜牧兽医学院张金龙将该鸡场发病鸡的病料收集并制成油乳剂组织灭活苗对该鸡群进行免疫,免疫了两批鸡,均取得很满意的效果。由于现在鸡的疫病越来越多,随着时间的推移有 相似文献
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有关镇江市肉用鸡慢性呼吸道疾病的发病状况已作了报道，在我市四县（市）二区范围内共抽查31户，饲养128批，饲养量为36．22万羽，发病率50．1％，死亡率2．1％。现将本病病原及防治简述如下：1病原诊断1995年3月至1996年10月，市站先后从润州区成某鸡场、丹阳市延陵沈某鸡场、句容市东昌镇程某鸡场选择本疾病的典型病鸡，分别送有关诊断单位。省家禽所老师来我市的发病鸡场诊断病原，包括疫情调查、临床观察、病鸡剖检、取病料回所诊断等。通过几个鸡场多次综合诊断，我市肉用鸡呈慢性呼吸道症状的疾病主要有五种，分别是传染性喉气管炎、… 相似文献
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鸡传染性喉气管炎（ILT）是由疱疹病毒引起的一种急性病毒性呼吸道传染病，可引起鸡只死亡和产蛋率下降。近年来，本地一些中小型鸡场鸡传染性喉气管炎病频发，尤以小型鸡场为重，经采取综合防治措施，减轻了养鸡户的损失。 相似文献
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祝夕超 《畜牧兽医科技信息》2023,(9):183-185
为探究鸡慢性呼吸道病用中西医结合治疗的效果。本实验在2020年7月～2021年12月期间选择某鸡场349只慢性呼吸道病鸡为治疗样本,均给予VA以及清热解毒的中草药疗。经过5d治疗后,病鸡死亡11只,死亡率为3.15%,其余鸡的情况好转,采食量正常,粪便颜色正常。可见,中西医结合治疗可明显缓解鸡慢性呼吸道疾病症状,减少养殖户的损失。 相似文献
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鸡传染性支气管炎病毒免疫机制和免疫预防研究进展 总被引：1，自引：0，他引：1
由鸡传染性支气管炎病毒（Infectious bronchitis virus,IBV）引起的鸡传染性支气管炎（Infectious bronchitis,IB）是高度传染的全球性鸡病之一,严重危害养鸡业。IBV众多的血清型及其基因组的不断变异,给IB的免疫防控带来很大的困难。IBV主要侵害鸡的呼吸系统、泌尿生殖系统和消化系统,病鸡出现呼吸困难、产蛋下降、肾炎和腺胃炎等症状和病变。IBV的特点是变异频繁,血清型复杂,所致疾病的临床表现差异很大。因此,IB已成为养禽业最难控制的疫病之一。鸡对IBV的免疫机制是国内外研究的热点之一。传统疫苗已不能完全保护免疫鸡群,开发IBV基因工程疫苗,从主要免疫原性蛋白的良好表达到免疫策略的不断完善,已成为未来预防IB的趋势。 相似文献
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Jun Gu Choi Youn Jeong Lee Yong Joo Kim Eun Kyoung Lee Ok Mi Jeong Haan Woo Sung Jae Hong Kim Jun Hun Kwon 《Journal of veterinary science (Suw?n-si, Korea)》2008,9(1):67-74
The H9N2 subtype low pathogenic avian influenza is one of the most prevalent avian diseases worldwide, and was first documented in 1996 in Korea. This disease caused serious economic loss in Korea''s poultry industry.In order to develop an oil-based inactivated vaccine, a virus that had been isolated in 2001 (A/chicken/Korea/01310/2001) was selected based on its pathogenic, antigenic, and genetic properties. However, in animal experiments, the efficacy of the vaccine was found to be very low without concentration of the antigen (27 to 210 hemagglutinin unit). In order to overcome the low productivity, we passaged the vaccine candidate virus to chicken eggs. After the 20th passage, the virus was approximately ten times more productive compared with the parent virus. For the most part, the passaged virus maintained the hemagglutinin cleavage site amino acid motif (PATSGR/GLF) and had only three amino acid changes (T133N, V216G, E439D, H3 numbering) in the hemagglutinin molecule, as well as 18 amino acid deletions (55-72) and one amino acid change (E54D) in the NA stalk region. The amino acid changes did not significantly affect the antigenicity of the vaccine virus when tested by hemagglutination inhibition assay. Though not complete, the vaccine produced after the 20th passage of the virus (01310 CE20) showed good protection against a homologous and recent Korean isolate (A/chicken/Korea/Q30/2004) in specific pathogen- free chickens.The vaccine developed in this study would be helpful for controlling the H9N2 LPAI in Korea. 相似文献
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为探讨中兽药复方组合与抗生素防治肉鸡呼吸道疾病的协同效应,本研究在规模化鸡场两栋鸡舍内分别随机选取100只3日龄白羽肉鸡,分为两组（Ⅰ组和Ⅱ组）：Ⅰ组饮水添加抗生素,Ⅱ组在添加抗生素基础上的不同阶段分别饲喂中兽药玉屏风口服液（3~7 d）、射干地龙颗粒（10~16 d）、双黄连口服液（22~25 d）、麻杏石甘口服液（27~31 d）。分别于8日龄免疫鸡传染性支气管炎活疫苗、新城疫-传染性支气管炎二联活疫苗和新城疫-禽流感二联灭活疫苗,免疫后1、7、14、21、28 d采集血清和气管组织,检测新城疫、禽流感（H9）、传染性支气管炎疫苗的抗体水平,观察气管组织病理变化,计算免疫器官指数和平均日增重。结果显示,Ⅱ组的成活率较Ⅰ组提高了1.23%,Ⅱ组末体重与平均日增重极显著高于Ⅰ组（P<0.01）,分别提高了561.25和16.63 g/d;Ⅱ组病鸡呼吸道症状较Ⅰ组轻,病程短,肝脏和心脏无明显病变,脾脏指数在36 d显著高于Ⅰ组（P<0.05）。免疫后21 d,Ⅱ组新城疫、传染性支气管炎和禽流感（H9）疫苗的抗体水平达到最高,显著高于Ⅰ组（P<0.05）;免疫后28 d,Ⅱ组新城疫抗体水平极显著高于Ⅰ组（P<0.01）。综上所述,4种清热解毒、止咳平喘、清肝利胆的中兽药复方组合使用与抗生素促生长和预防肉鸡呼吸道疾病具有协同效应。 相似文献
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Chicken immunosuppressive diseases can not only make chicken immunity decline,seriously affect the growth,and also cause some other vaccine failure and have great effects on the chicken breeding.The reasons causing immunosuppression are varies,including viral factor,chemical factor,irritability factor,nutrition factor and so on,of which the viral factor occupies the important position.This paper summarized the progress of etiology characteristics,virus detection and prevention of several common viral immunosuppressive diseases on chicken,so as to provide certain reference for research,prevention and treatment of these diseases. 相似文献
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通过对送检病羊的临床症状、剖检变化、病料染色镜检,初步诊断为绵羊支原体肺炎。又经无菌采取病料接种改良Frey培养氏液,再取培养液接种于固体培养液后分离到可疑绵羊肺炎支原体。然后将培养生长的支原体分别进行革兰氏染色、姬姆萨染色、瑞氏染色和碱性复红染色;进行了各种生化试验,进行动物和鸡胚接种试验和平扳凝集等血清学试验;最后确诊为绵羊支原体肺炎,并分离获得了绵羊肺炎支原体。该结果为绵羊支原体肺炎的防制奠定了基础。 相似文献
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The effect of oil-emulsion vaccines on the occurrence of nonspecific plate agglutination reactions for Mycoplasma gallisepticum and M. synoviae 总被引：1，自引：0，他引：1
Six groups of ten 18-week-old mycoplasma-free white leghorn pullets were vaccinated with one of the following: Mycoplasma gallisepticum (MG) bacterin. Haemophilus gallinarum bacterin, Pasteurella multocida bacterin, combined infectious bursal disease (IBD)-Newcastle (NDV) chicken-embryo-origin (CEO) vaccine. IBD-NDV tissue-culture-origin (TC) vaccine, or saline emulsified in oil; one group received no vaccine. Plate agglutination tests for M. synoviae (MS) and MG were done for 10 weeks after vaccination using three different test antigens. Pullets vaccinated with H. gallinarum bacterin and IBD-NDV TC vaccine showed the greatest incidence of nonspecific plate agglutination reactions. The incidence of positive plate agglutination reactions varied with test antigens. Five groups of fifty 18-week-old mycoplasma-free heavy-breed pullets were vaccinated with one of the following: saline emulsified in oil, chicken embryo fibroblasts emulsified in oil, allantoic fluid emulsified in oil, chicken embryos emulsified in oil, or MS-contaminated chicken embryos emulsified in oil. Plate agglutination tests for MS and MG were done for 8 weeks after vaccination. Chickens vaccinated with chicken embryo fibroblasts emulsified in oil had the greatest incidence of nonspecific plate agglutination reactions. Pullets vaccinated with MS-contaminated chicken embryo vaccine had only a small increase in MS-positive plate agglutination reactions compared with pullets vaccinated with uncontaminated chicken embryo vaccine. 相似文献
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鸡黄病毒FQ—C1株经SPF鸡胚连续传40代后,检测其尿囊液毒的ELD50达到1×10^-4.33／0．1mL。将该病毒第40代SPF鸡胚液毒灭活后制备成油乳剂灭活疫苗。SPF雏鸡和蛋鸡安全性试验表明,该疫苗的安全性好,无不良影响。以该疫苗一次单剂量（1mI／只）免疫开产蛋鸡,28d后攻以鸡黄病毒强毒测定疫苗的保护效果,结果显示疫苗免疫组较未免疫组蛋鸡的产蛋率高出75．8％,产蛋保护率达93．2％以上。试验表明,本研究制备的鸡黄病毒灭活疫苗安全性好,且具有良好的免疫原性,免疫后可有效抵抗鸡黄病毒所致的产蛋骤降。 相似文献