共查询到19条相似文献，搜索用时 0 毫秒
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种草养鹅在不少地区已普遍推广,出现了不少规模化养殖场,取得显著经济效益。为搞好鹅病防疫,特推荐以下免疫程序。1.肉鹅1日龄预防小鹅瘟:应用小鹅瘟活疫苗(即弱毒疫苗)1头份,用0.2毫升生理盐水稀释后肌注。注射后7天能产生免疫力。如无此疫苗,可用抗小鹅瘟血清0.5毫升或抗小鹅瘟高免蛋黄液0.5毫升,4日龄时肌注。如果种鹅在产蛋前已注射过小鹅瘟活疫苗2次,所产蛋孵出的雏鹅就有抗小鹅瘟抗体存在,不需要注射疫苗。3日龄预防鹅副粘病毒病:应用鹅副粘病毒活疫苗1头份,用0.3毫升生理盐水稀释后肌注。也可用鹅副粘病毒油乳疫苗0.5毫升肌注。如无上述疫苗,可用小鹅瘟、副粘病毒病二联血清或小鹅瘟、副粘 相似文献
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制备4批小鹅瘟高免血清,用这些血清进行保护试验、治疗试验、保护期试验和田间防治试验的结果表明,2～3日龄雏鹅注射高免血清0.5～1mL,抵抗自然感染的保护率达95%～100%,抵抗强毒株(剂量为0.5×10~(-2)mL)感染的保护率为80%～100%;5～7日龄病雏注射高免血清2～4mL,治愈率为86%;2～3日龄雏鹅注射高免血清1mL,对人工感染和自然感染的保护期至少有15d;田间试验共预防雏鹅2816只,保护率为97.1%,治疗雏鹅5943只,治愈率为78.8%。结果证明高免血清是防治小鹅瘟的较理想的制剂。 相似文献
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抗小鹅瘟异源高免血清的研制和应用 总被引：4，自引：0，他引：4
用小鹅瘟病毒弱毒抗原加福氏完全佐剂后，分二次皮内多点注射免疫山羊、奶山羊，皮下注射免疫黄牛，结合二次静脉注射免疫小鹅瘟强毒，用琼扩进行效价测定，可获得琼扩抗体平均效价为１：１６—１：６４的抗小鹅瘟高免血清。将制备的三种动物的高免血清混合稀释至琼扩效价１：４、１：８，分别用于预防免疫１－１０日龄的雏鹅，获得保护率为９０％和９６．３％；用于治疗发病鹅群，治愈率达８４％和９２％。牛、羊抗小鹅瘟异源高免血清具有效价高、成本低、安全性好等优点 相似文献
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一、雏鹅群1、小鹅瘟雏鹅活苗免疫未经小鹅瘟活苗免疫种鹅后代的雏鹅,或经小鹅瘟活苗免疫100天之后种鹅后代的雏鹅,在出壳后1～2天内应用小鹅瘟雏鹅活苗皮下注射免疫。免疫7天内须隔离饲养,防止在未产生免疫力之前因野外强毒感染而引起发病, 相似文献
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从死亡的具有典型小鹅瘟症状的7日龄雏鹅肝中分离到1株病毒．选用未免疫小鹅瘟疫苗的健康母鹅所产的12日龄鹅胚，进行鹅胚接种试验，雏鹅表现出典型鹅瘟临床症状和剖检特征；鸡胚致死率达到25％；不能凝集多种动物红细胞；能凝集黄牛精子，经琼脂扩散试验，用此株病毒感染的鹅胚液能与小鹅瘟病毒阳性血清发生特异性反应．综上所述，这株病毒初步鉴定为小鹅瘟病毒． 相似文献
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无菌采取怀疑患小鹅瘟雏鹅的脑、肝、脾、肾等组织样本，健康鹅胚尿囊腔接种分离病毒，经雏鹅保护试验及鹅胚内中和试验鉴定，确诊病雏鹅的病原为小鹅瘟病毒，应用所分离的病毒制备高免卵黄抗体，经效力检验，取得对小蛾瘟攻毒保护100%的良好效果。 相似文献
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采用本地小鹅瘟强毒株C-85 F~2成功地研制了鹅胚化小鹅瘟(简称SEP)和鸭胚化小鹅瘟(简称SGD)疫苗,并对两苗进行了安全试验、无菌试验、效力测定试验和田间免疫试验。结果表明,用SEP或SGD原液2lm肌注成年母鹅均安全;经1次免疫(1:1OO SGD或1:100 SEP每只1ml)或2次免疫(1:100 SGD和1:50 SEP每只各1ml)的成年母鹅种蛋所孵的鹅胚或雏鹅,都具有抵抗小鹅瘟强毒的能力,其保护率达90%;在岳阳、怀化等地田间免疫母鹅的跟踪调查,其抵抗自然感染的保护率为95%。 相似文献
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雏鹅感染鸭瘟的诊断及防治 总被引：7，自引：0，他引：7
用患病雏鹅的肝、脾、肾作病料分离病毒,经致病性试验、被动免疫试验、中和试验证明了分离病毒为鸭瘟病毒;并用此病毒研制成油乳剂灭活苗,结果表明该油乳剂灭活苗对鹅的鸭瘟的预防和治疗效果十分理想. 相似文献
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利用表达的重组融合蛋白pGEX-6P-1-VP1作为抗原,用PET-32a-VP1蛋白免疫家兔获得的阳性血清作为FMDV阳性血清的竞争抗体,建立了检测FMDV抗体的竞争ELISA,并进行了条件优化,利用统计学方法计算竞争ELISA的阳性临界值。结果显示,重组蛋白抗原的最适包被质量浓度为1μg·mL~(-1),待检血清、酶标抗体和高免血清的最佳稀释度分别为1∶40、1∶2000和1∶500;与液相阻断ELISA试剂盒相比较,该方法的敏感性为91.3%,特异性为95.1%,符合率为96.7%。结果表明,该方法敏感性好、特异性强、重复性好,可用于O型FMDV血清抗体水平的检测。 相似文献
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Zhou Jin-xin Zhang Xiao-yu Wang Yu-yang Huang Tao Guo Xiao-chen Li De-shan Ma Bo Ren Gui-ping 《东北农业大学学报(英文版)》2021,28(1):50-60
Goose parvovirus (GPV) can cause a highly contagious and fatal gosling plague (GP) disease in goslings and muscoy ducklings.Here,three goose-origin neutralizing single chain variable fragment (scFv) antibodies against GPV SYG-61 were isolated.The genes of scFv antibodies were derived from goslings immunized with GPV SYG-61,and scFvs were subcloned into a pBSD vector for the construction of pBSD-scFv libraries.The pBSD-scFv libraries were screened following three rounds using VP2 (protective antigen of GPV) as the bait by flow cytometry (FCM).After screening,the 15 clones with high mean fluorescence intensity (MFI) were isolated and sequenced.These 15 scFvs were expressed by pET-28a (+) in E.coli.The specificity and affinity of the 15 purified scFvs were successfully confirmed by ELISA.In the preliminary neutralization experiment on primary goose embryo fibroblast (GEF) in vitro,three of the 15 purified scFvs (named scFv-10,scFv-11 and scFv-50) showed significant neutralizing capacities.The study generated the first goose-origin neutralizing scFv against GPV and laid the foundation for the appearance of full-length goose-origin neutralizing monoclonal antibody against GPV. 相似文献
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从扬州郊区某鹅场死亡的、具有小鹅瘟典型病变的雏鹅肝、脾、肠病料组织中分离到一株病毒。经过试验鉴定,该毒株能与小鹅瘟阳性血清发生沉淀反应,通过电镜可以观察到典型的细小病毒样粒子;人工感染雏鹅,可引起发病和死亡,并与自然病例有相似的临床症状和病理变化。该毒株的鹅胚半数致死量（ELD50）为106.160.2 mL,最小致死量病毒致死鹅胚的平均时间(MDT)为93.6 h;结果表明,该野外分离病毒为小鹅瘟强毒株,命名为YZ-0703株。 相似文献
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Effects of Dietary Fiber and Grit on Performance,Gastrointestinal Tract Development,Lipometabolism, and Grit Retention of Goslings 
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下载免费PDF全文 JIN Ling GAO Yu-yun YE Hui WANG Wen-ce LIN Zhen-ping YANG Hui-yong HUANG Song-bo YANG Lin 《农业科学学报》2014,13(12):2731-2740
This study investigated effects of dietary fibre and grit on growth performance, gastrointestinal tract (GIT) development, serum indexes and grit retention of Sichuan white goslings in China. The experiment was a 3×2 factorial design consisting of dietary crude fibre (CF) at 2.0, 4.0 and 6.0% levels by adding grass meal and with or without grit supplementation. A total of 7201-d-old male goslings were randomly allocated into 36 pens of 20 goslings/pen (n=6 pens/treatment). At 21 d of age, GIT, blood samples and grit in gizzards were collected. Body weight (BW), empty BW (without GIT), average daily gain (ADG) and average daily feed intake (ADFI) were affected by CF levels and the medium (4.0%) had the highest value. Adding grit improved BW, empty BW, ADG and ADFI. CF affected relative weight or length of proventriculus, gizzard and duodenum. Increasing CF levels decreased jejunum villus height and affected caecal crypt depth and villus height to crypt depth ratio. Higher CF levels decreased serum triglyceride. Adding grit increased relative weight of abdominal fat. Grit addition increased grit weight in gizzard and the ratio of grit in 0.45-1 and 1-2 mm while decreasing the ratio of grit <0.45 and 2-3 mm. In conclusion, moderate CF level and grit addition increased performance of goslings without interaction. Dietary CF levels affected the development of upper GIT and serum triglyceride. Grit needed by goslings should be less than 2 mm. Goslings' gizzard would accumulate grit from feed when other grit could not be acquired. 相似文献