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将鸭坦布苏病毒浓缩后制备灭活苗,免疫试验鸡制备卵黄抗体,鸡胚中和试验表明,第3次免疫后15d,卵黄抗体中和效价为1：10^3.5,雏鸭攻毒保护试验结果表明,预防组和治疗组的保护率分别达到90％和78％,说明本试验制备的卵黄抗体对鸭坦布苏病毒病有着显著的预防和治疗作用。 相似文献
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应用雏鸭肝炎病毒（ＤＨＶ）鸡胚化弱毒株（ＱＬ７９）和鸭病毒性肝炎油剂苗免疫鸡制备了高免卵黄抗体。考察了使用高免卵黄抗体治疗雏鸭病毒性肝炎（ＤＶＨ）的疗效。结果表明，用卵黄抗体治疗ＤＶＨ的疗效取决于卵黄抗体的中和效价及治疗的时间。卵黄抗体的中和效价应达２８．５以上，治疗最佳时间应在ＤＨＶ强毒进入鸭体后２８小时内，抗体效价在２８．５以下或错过最佳时间或超过３６小时，则治疗效果极差。 相似文献
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《中国牧业通讯》2001,(2):63
一是不宜用于种鸡。目前建立高免鸡群时虽然采取临床诊断、抗体监测等手段剔去一些病鸡，但一些经蛋传播的病毒性传染病的病鸡很难除去；在制作高免卵黄过程中虽然加入了抗生素和防腐剂，但高免卵黄中的病毒不易杀死。因此，种鸡应用高免卵黄抗体后，容易造成某些病毒性传染病的垂直传播。二是不宜用于预防。高免卵黄抗体进入鸡体后的免疫有效期仅14天左右。若采用高免卵黄抗体预防，必须每隔14天进行一次免疫，既增加了养鸡成本，也易引起鸡的应激反应。三是不宜和疫苗同时应用。高免卵黄抗体在鸡体内属被动免疫，如果同时接种相应的疫苗，疫苗与高免卵黄抗体发生中和，这样，疫苗不但起不到免疫效果，反而会降低高免卵黄抗体的效价。为此，使用高免卵黄抗体后，应间隔12天后接种相应的疫苗，接种疫苗时应间隔5天才能使用相应的高免卵黄抗体。 相似文献
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应用高免卵黄抗体防治鸭病毒性肝炎的研究 总被引：11，自引：0，他引：11
应用雏鸭肝炎病毒（ＤＨＶ）鸡胚化弱毒株（ＱＬ７９）和鸭病毒性肝炎油剂苗免疫鸡制备了高免卵黄抗体，考察了使用高兔卵黄抗体治疗雏鸭病毒性肝炎（ＤＶＨ）的疗效。结果表明，用卵黄抗体治疗ＤＶＨ的疗交取决于卵黄抗体的中和效价及治疗的时间，卵黄抗体的中和效应应达２＾８．５以上，治疗最佳时间应在ＤＨＶ强毒进入鸭体后２８小时内，抗体效价在２＾８．５以上或过最佳时间或超过３６小时，则治疗效果极差。 相似文献
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《黑龙江畜牧兽医》2015,(7)
为了获得高效价鸡抗犬瘟热病毒高免卵黄抗体,试验通过设计免疫程序免疫试验蛋鸡和筛选的卵黄抗体效价检测方法对氯仿法提取的卵黄抗体液进行鸡抗犬瘟热卵黄抗体效价检测并比较,筛选鸡抗犬瘟热病毒高免卵黄抗体最佳免疫程序,并作无菌与保存条件的探讨。结果表明:血凝及血凝抑制试验可作为鸡抗犬瘟热卵黄抗体效价的检测方法;按照基础免疫、加强免疫、强化免疫均间隔9 d,免疫剂量分别为1 m L/次、2 m L/次、3 m L/次的免疫程序能获得1∶512的鸡抗犬瘟热病毒卵黄抗体血凝抑制效价,为此次探讨的鸡抗犬瘟热病毒高免卵黄抗体最佳免疫程序,-20℃保存温度适合长期保存氯仿法粗提的鸡抗犬瘟热病毒卵黄抗体液。 相似文献
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Passive protection of dogs against clinical disease due to Canine parvovirus-2 by specific antibody from chicken egg yolk 总被引：4，自引：0，他引：4 
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下载免费PDF全文 Sa Van Nguyen Kouji Umeda Hideaki Yokoyama Yukinobu Tohya Yoshikatsu Kodama 《Canadian journal of veterinary research》2006,70(1):62-64
The protective effect of immunoglobulins derived from chicken egg yolk (IgY) against infection by Canine parvovirus 2 (CPV-2) was evaluated in 10 beagle dogs orally challenged with a strain of the virus. The 2-mo-old dogs were divided into 3 groups and treated with powders containing CPV-2 IgY or normal egg yolk for 7 d after the challenge. The 4 dogs receiving normal egg yolk (control group) demonstrated mild symptoms typical of CPV-2 infection, such as vomiting, diarrhea, and weight loss. No symptoms were observed by 16 d after challenge in the 3 dogs receiving 2 g of IgY powder. Of the 3 dogs receiving 0.5 g of IgY powder, 2 had clinical CPV-2 disease; however, the manifestations were less severe than in the control group. Furthermore, the IgY-treated groups had significantly greater weight gain and shorter duration of virus shedding than the control group. These results indicate that IgY is useful in protecting dogs from CPV-2-induced clinical disease. 相似文献
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抗奶牛乳腺炎多价卵黄抗体的制备及含量测定 总被引：2，自引：1，他引：1
本研究的目的是制备抗奶牛乳腺炎主要致病菌的多价卵黄抗体并检测特异性抗体的含量。采用金黄色葡萄球菌、无乳链球菌和大肠杆菌混合抗原免疫产蛋母鸡。通过水稀释法分离卵黄抗体。采用ELISA法检测抗体效价和特异性抗体含量。多价抗体与大肠杆菌的结合效价最高可达25600,与金黄色葡萄球菌和无乳链球菌的结合效价为12800。每毫升卵黄液中大肠杆菌、金黄色葡萄球菌和无乳链球菌特异性卵黄抗体（egg yolk immunoglobulin,IgY）的最高含量分别为2.13、2.01和1.92 mg。免疫后特异性抗体含量随时间变化趋势与抗体效价变化趋势一致。 相似文献
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Vega C Bok M Chacana P Saif L Fernandez F Parreño V 《Veterinary immunology and immunopathology》2011,142(3-4):156-169
Bovine rotavirus (BRV) is an important cause of diarrhea in newborn calves. Local passive immunity is the most efficient protective strategy to control the disease. IgY technology (the use of chicken egg yolk immunoglobulins) is an economic and practical alternative to prevent BRV diarrhea in dairy calves. The aim of this study was to evaluate the protection and immunomodulation induced by the oral administration of egg yolk enriched in BRV specific IgY to experimentally BRV infected calves. All calves in groups Gp 1, 2 and 3 received control colostrum (CC; BRV virus neutralization Ab titer - VN=65,536; ELISA BRV IgG(1)=16,384) prior to gut closure. After gut closure, calves received milk supplemented with 6% BRV-immune egg yolk [(Gp 1) VN=2048; ELISA IgY Ab titer=4096] or non-immune control egg yolk [(Gp 2) VN<4; ELISA IgY Ab titer<4] twice a day, for 14 days. Calves receiving CC only or colostrum deprived calves (CD) fed antibody (Ab) free milk served as controls (Gp 3 and 4, respectively). Calves were inoculated with 10(5.85)focus forming units (FFU) of virulent BRV IND at 2 days of age. Control calves (Gp 3 and 4) and calves fed control IgY (Gp 2) were infected and developed severe diarrhea. Around 80% calves in Gp 1 (IgY 4096) were infected, but they showed 80% (4/5) protection against BRV diarrhea. Bovine RV-specific IgY Ab were detected in the feces of calves in Gp 1, indicating that avian antibodies (Abs) remained intact after passage through the gastrointestinal tract. At post infection day 21, the duodenum was the major site of BRV specific antibody secreting cells (ASC) in all experimental groups. Mucosal ASC responses of all isotypes were significantly higher in the IgY treated groups, independently of the specificity of the treatment, indicating that egg yolk components modulated the immune response against BRV infection at the mucosal level. These results indicate that supplementing newborn calves' diets for the first 14 days of life with egg yolk enriched in BRV-specific IgY represents a promising strategy to prevent BRV diarrhea. Moreover a strong active ASC immune response is induced in the intestinal mucosa following BRV infection after the administration of egg yolk, regardless the specificity of the treatment. 相似文献
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抗牛多杀性巴氏杆菌高免卵黄抗体IgY的制备及间接血凝检测方法的建立 总被引：1，自引：0，他引：1
本研究通过自制牛源荚膜血清A型多杀性巴氏杆菌灭活菌苗免疫产蛋鸡,采用卡拉胶结合硫酸铵沉淀法提取卵黄抗体IgY,并采用间接血凝方法检测抗体效价。结果表明,抗原致敏红细胞的最佳浓度是800μg/mL,免疫后第7周抗体效价达到高峰,效价为1：1024,高效价持续5周开始下降,测定提取的IgY浓度为8.258mg/mL,无菌检测及动物安全性实验表明制备的卵黄抗体安全可靠。本研究制备了抗牛多杀性巴氏杆菌卵黄抗体,为防治由荚膜血清A型多杀性巴氏杆菌所致的犊牛肺炎提供了新的手段。 相似文献
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IgY在免疫检测及治疗中的应用进展 总被引：1，自引：0，他引：1
卵黄抗体(IgY)是存在于卵黄中的免疫球蛋白,是鸟类、爬行动物和两栖类动物体内的主要抗体,具有强大的免疫功能。论文介绍了卵黄抗体的分子结构和理化特性,综述了IgY在寄生虫(弓形虫、血吸虫、球虫)、细菌(肠产毒素大肠埃希菌)、病毒(B型流感病毒、狂犬病病毒)等病原检测、抗生素(卡那霉素、庆大霉素)残留检测及相关疾病如雏鸡球虫病、猪大肠杆菌病、鳗鱼弧菌和利斯顿氏菌病、轮状病毒病治疗中的应用,并指出目前IgY应用中存在的诸如可能存在禽类未知病原、尚无生产标准规程以及稳定性不够理想等问题。因卵黄抗体具有安全、高效、无公害的特点,其在疫病检测和防治中具有广阔的应用前景。 相似文献
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本试验利用猪流行性腹泻病毒(porcine epidemic diarrhea virus,PEDV)SC株免疫产蛋鸡,收集高免卵黄,采用水稀释法和水稀释-盐析法获得鸡源抗PEDV卵黄抗体,采用已建立的ELISA方法对卵黄抗体效价进行测定。以3日龄无母源抗体的易感仔猪为试验动物,对抗PEDV卵黄抗体的治疗效果及安全性进行测定,并进一步利用自然发病猪场的治疗效果进行验证。结果表明,经PEDV SC株细胞毒免疫的鸡可在2次加强免疫后15 d产生高水平的特异性抗体。在实验室治疗试验中,攻毒治疗组仔猪的存活率达60%,攻毒对照组存活率为20%;用于自然发病猪场时,饲喂抗PEDV卵黄抗体饲料的仔猪存活率亦为60%,而自然发病对照组的存活率为10%。以上结果表明抗PEDV卵黄抗体对感染PEDV的仔猪有一定治疗作用。 相似文献
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Lobbedey L Schlatterer B 《Journal of veterinary medicine. B, Infectious diseases and veterinary public health》2003,50(2):81-85
A direct and an indirect antibody enzyme-linked immunosorbent assay for duck yolk IgY and duck serum IgY was developed and tested on egg yolk and serum of ducks vaccinated with Riemerella anatipestifer (Ra). Tests were performed either with primary antibodies labelled with horseradish peroxidase or with alkaline phosphatase-labelled secondary antibodies reacting with specifically bound rabbit anti-duck IgY antibodies, respectively. Ra-specific IgYs in egg yolk from three ducks increased rapidly at day 8 after the first of two vaccinations. In two ducks, the IgY titre persisted on a high plateau for 3 months. The concentration of Ra-specific IgYs in the serum of the progeny of vaccinees decreased between day 3 and day 10 after hatching. The fraction of total IgYs decreased less but also significantly. It was shown that antibodies were vertically transmitted and therefore protect offspring against Ra infection at least during the first week after hatching. The test design with anti-IgY rabbit antibodies is further suitable to detect other specific antibodies if respective antigens were fixed on solid phases. 相似文献
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A Comparison of Three Methods for Extracting IgY from the Egg Yolk of Hens Immunized with Sendai Virus 总被引：8，自引：0，他引：8
Hens were immunized with partially purified Sendai virus that had been grown on chicken embryos. The titres of specific antibodies to Sendai virus varied from log2 13.0 to 15.5 during the 4 months after immunization and the immunoglobulin Y (IgY) concentration varied from 2 to 10 mg per ml of egg yolk. A method has been developed employing dextran blue to isolate IgY from the egg yolk. The dextran blue method was compared with two other methods (poly(ethylene glycol) and chloroform) in terms of yield, total protein content, IgY concentration, specific activity of IgY and SDS-PAGE analysis. The specific activity and the IgY content obtained by these three methods proved to be identical, in the range log2 12.9–14.1, and 4.6–12.8 mg/egg, respectively. However, the total protein content when purified by chloroform was 2-fold to 4-fold higher than that of the others. The analysis of IgY by SDS-PAGE demonstrated that IgY purified with dextran blue contained three major protein components with molecular weights of 34.7 kDa, 41 kDa and 66 kDa and one minor protein of 45 kDa. IgY that was extracted with chloroform contained two major proteins of 45.7 kDa and 75.2 kDa and that extracted with PEG-6000 contained only one major protein of 66 kDa. The IgY obtained by these latter methods also contained several minor proteins in the range 41–80 kDa. 相似文献
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鸡新城疫卵黄抗体IgY的分离提纯研究 总被引：7，自引：0，他引：7
本文对母鸡经鸡新城疫疫苗免疫接种后产生并富集在卵黄中的抗体IgY的提取纯化工艺条件进行了研究与优化，确定了去脂、提取抗体最佳工艺为：卵黄液用0．05mol／L,pH5.0的乙酸一乙酸钠缓冲液1：9倍稀释，搅拌15min，4℃静置10小时，抗体回收率为90％，去脂率为99％；该提取液用40％饱和度的硫酸铵盐析，得到的盐析液抗体回收率为82％，纯度达到69％。盐析液经截留分子量为100KD的有机陶瓷膜超滤后，截留液抗体回收率达到92％。纯度为85％。 相似文献