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试验旨在开发能够有效预防和治疗仔猪细菌性腹泻和病毒性腹泻的卵黄免疫球蛋白粉相关产品,将卵黄抗体的先进技术更好地应用于畜牧养殖中。采用两种复合型卵黄免疫球蛋白粉对人工感染细菌(ETEC)和病毒(PEDV和TGEV)的21日龄断奶仔猪进行预防和治疗试验。将复合型卵黄免疫球蛋白粉Ⅰ型按0.4%添加至仔猪断奶日粮中,攻毒后仔猪没有出现死亡情况,只有5头仔猪在攻毒初期出现轻微腹泻情况,随着饲喂的继续,5头仔猪腹泻很快得到控制,而攻毒对照组仔猪全部死亡;对21日龄仔猪攻毒,攻毒24h内仔猪陆续出现腹泻症状。在攻毒24h后采用复合型卵黄免疫球蛋白粉Ⅱ型产品以1∶3的比例配以葡萄糖生理盐水进行灌服治疗,经3d治疗后仔猪腹泻情况得到很大的改善,5d后腹泻仔猪基本痊愈,治愈率可达84%~88%。对存活仔猪进行带毒检测,结果显示,预防组存活仔猪带毒水平较其他组更低,治疗组其次,而药物治疗对照组带毒情况严重。 相似文献
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为了有效防治鸡白痢沙门杆菌病,试验采用吉林市郊区数家鸡场分离、鉴定的致病性鸡白痢沙门杆菌,经固体增菌培养纯化后用甲醛灭活,制成油佐剂灭活抗原免疫健康蛋鸡;当抗体效价达到1∶320倍时,收集免疫鸡所产蛋分离卵黄,减压,低温干燥,制成卵黄抗体细粉,对试验雏鸡采用预防量饲喂后进行强毒菌攻毒试验、强毒菌攻毒后治疗量的饲喂试验及小区域雏鸡饲喂试验。结果表明:卵黄抗体粉预防添加量为3%时,攻毒保护率可达73.3%;治疗添加量为5%时,治愈率可达66.67%;卵黄抗体添加组较同期普通饲养组总发病率降低7%,抗生素用量降低11%,增重率提高6%。 相似文献
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采用吉林市郊区数家鸡场分离鉴定的致病性鸡白痢沙门氏菌,经固体增菌培养纯化后甲醛灭活,制成油佐剂灭活抗原免疫健康蛋鸡;用平板凝集试验检测卵黄抗体效价,当抗体效价达到1:320倍时,收集免疫鸡蛋分离卵黄,减压低温干燥制成卵黄抗体细粉并进行效价测定和安全检测。最后将卵黄抗体细粉以不同比例加入雏鸡饲料,对试验雏鸡进行预防量饲喂后强毒菌攻毒试验、强毒菌攻毒后治疗量的饲喂试验及小区域雏鸡饲喂试验。结果表明,卵黄抗体粉预防添加量为3%和卵黄抗体治疗添加量为6%时,攻毒保护率、治愈率分别为77.50%和72.50%;饲料添加组较同期普通饲养组总发病率降低7个百分点,抗生素用量降低33%,增重率提高6%。 相似文献
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本实验取3批实验室试制的卵黄抗体,按1.0m L/只肌肉接种21和42日龄SPF鸡,分别在注射抗体后1、3、5和7d攻毒,观察攻毒保护情况。结果显示,试验鸡接种抗体后1~5d注射I群4型禽腺病毒强毒,攻毒保护率均在90%以上;注射后7d的攻毒保护率为46.7%~50%;各时间点攻毒对照组鸡均90%~100%发病,剖检试验鸡,死亡和发病鸡均呈典型的心包积液及肝脏肿大和坏死的病理变化;健康对照组均100%健活。说明注射抗体后5d抗体仍能产生良好地保护作用,而7d后保护作用大幅减弱。因此,确定I群4型禽腺病毒卵黄抗体被动免疫保护期为5d。 相似文献
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猪流行性腹泻病毒简称为PEDV,属于冠状病毒科,发病症状与传染性肠胃炎病毒很相似。本文以试验的形式分析两组不同仔猪抗猪流行性腹泻病毒卵黄抗体治疗效果,在试验结果的基础上,总结出抗猪流行性腹泻病毒卵黄抗体治疗措施。 相似文献
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《现代畜牧兽医》2021,(10)
为明确新型鸭呼肠孤病毒卵黄抗体的治疗效果,试验对3、5和7日龄健康易感雏鸭注射新型鸭呼肠孤病毒强毒RPVA1301-Z株,攻毒24 h后采用不同批次、不同剂量卵黄抗体进行治疗,同时设攻毒对照组(不接种卵黄抗体,但攻毒)和健康对照组(不接种卵黄抗体,也不攻毒),通过剖检试验雏鸭,观察病理变化,统计攻毒保护情况及治愈率。结果显示,以0.5、1.0 mL卵黄抗体治疗3日龄感病雏鸭,治愈率为100%;以1.0、1.5 mL卵黄抗体治疗5、7日龄感病雏鸭,治愈率为100%,卵黄抗体使用剂量与感病雏鸭日龄呈正相关。研究表明,新型鸭呼肠孤病毒卵黄抗体对于感染初期的雏鸭有确切的治疗效果,且不同批次卵黄抗体治疗结果具有可重复性,具有临床应用推广的价值。 相似文献
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抗猪传染性胃肠炎病毒与猪流行性腹泻病毒卵黄抗体制备及其临床应用研究 总被引：2，自引：1，他引：1
本研究旨在制备猪传染性胃肠炎病毒和猪流行性腹泻病毒高免卵黄抗体,研究其治疗效果。以猪传染性胃肠炎和猪流行性腹泻二联灭活苗免疫产蛋鸡,琼脂扩散方法检测抗体效价达到1∶64时,收集卵黄,采用氯仿抽提和硫酸铵盐析法纯化卵黄抗体,进行微生物学检测、安全性试验,通过人工感染治疗试验和临床应用,观察其治疗效果。结果人工感染治愈率为100%,临床应用治愈率为88.0%,表明制备的卵黄抗体对猪传染性胃肠炎和流行性腹泻具有显著的治疗效果。 相似文献
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为制备抗猪流行性腹泻病毒（porcine epidemic diarrhea virus，PEDV）变异株卵黄抗体并探索卵黄抗体的纯化方法，本试验采用灭活的PEDV变异株CH/JX01全病毒免疫蛋鸡，收集免疫后所产的鸡蛋，分别用水稀释法、PEG-6000法和水稀释-硫酸铵二次沉淀法对鸡蛋中IgY进行提纯，然后运用间接ELISA和Western blotting方法鉴定和比较3种方法的提纯效果，获得可用于规模化生产的提纯方法；同时研究不同温度、pH条件下抗体活性，寻找对提纯IgY活性具有保护作用的物质。结果显示，本试验成功制备了抗PEDV变异株的卵黄抗体。浓度检测结果表明，水稀释法提取的IgY浓度最高，为6.204 mg/mL；PEG-6000方法提纯的IgY浓度次之，为4.673 mg/mL；水稀释-硫酸铵二次沉淀法IgY浓度最低，为3.359 mg/mL。间接ELISA检测结果表明，水稀释-硫酸铵二次沉淀法提纯的IgY效价最高，为1：12 800；其次是PEG-6000，为1：6 400；而水稀释法最低，为1：1 600。综合3种方法所提纯的卵黄抗体浓度与效价，发现水稀释-硫酸铵二次沉淀法的提纯效果优于其他两种方法。活性影响因素试验结果表明，提纯的IgY在37~60℃活性稳定；pH为4.0~11.0时具有良好的活性；在酸性条件下，20%硫糖铝对IgY活性具有较好的保护作用。本试验结果将为卵黄抗体的大规模生产运用与储存提供了有效的参考依据。 相似文献
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猪圆环病毒2型高免卵黄抗体的研制与应用 总被引：2，自引：1，他引：1
为制备猪圆环病毒2型(porcine circovirus serotype2,PCV-2)高免卵黄抗体,并对其治疗效果进行研究,通过自制猪圆环病毒2型(PCV-2)灭活苗,免疫SPF产蛋鸡,收集高免蛋,制备PCV-2高免卵黄抗体,对高免卵黄抗体进行无菌检验、活体动物安全性检测,用琼脂扩散方法进行效价检验和人工感染保育猪治疗试验,并将其应用于临床实践,观察其治疗效果。结果抗体效价达到1∶64;人工感染治疗试验治愈率达100%;临床试验治愈率为96%,应用效果良好。 相似文献
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V Wiedemann E Linckh R Kühlmann P Schmidt U L?sch 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1991,38(4):283-291
A field study and a controlled infection trial showed the protective effect of egg yolk lyophilisate and whole egg lyophilisate against enterotoxic E. coli germs. The lyophilisates were gained from eggs of hens immunized against pilus antigen of porcine-enterotoxic E. coli. In a first field study using egg yolk antibodies, 92% of 299 diarrhea affected piglets were cured. In a further field study diarrhea affected piglets were cured after 3 days by application of egg yolk lyophilisate from immunized hens. Piglets treated only with egg yolk of not immunized hens showed no signs of recovery. The infection trial showed, that whole egg lyophilisate of immunized hens was as successful as a common antibiotic therapy in curing piglets, orally infected with 5 x 10(10) E. coli/feeding and animal. The present data show that chicken egg antibodies can be used for treatment of infectious diarrheal diseases in young animals. So far they represent a good alternative to the common used antibiotic therapy. 相似文献
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卵黄抗体被动免疫防治仔猪产肠毒素大肠杆菌性腹泻 总被引：3，自引：0，他引：3
用ETECK88+菌株C83907对120日龄待开产蛋鸡进行免疫,获得高免卵黄抗体粉。选用3日龄和21日龄的杜×长×大三元杂交早期断奶仔猪,人工感染C83907大肠杆菌,口服含抗产肠毒素大肠杆菌抗体的卵黄粉进行被动免疫。结果显示,3日龄仔猪服用抗ETEC卵黄抗体粉后,72h腹泻停止,而服用普通蛋黄粉组却仍然腹泻并且有66.7%的死亡率;服用抗ETEC卵黄抗体粉的21日龄仔猪仅有短暂腹泻现象,存活率100%,试验期间总体质量有所增加,而对照组表现严重腹泻伴有脱水现象,试验期间有部分猪只死亡;临床应用表明,喂以3g和5g抗ETEC卵黄粉组的治愈率与抗生素治疗组相当。研究结果表明,卵黄抗体对早期断奶仔猪有一定的促进生长和防止腹泻的效果。 相似文献
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制备猪繁殖与呼吸综合征病毒高免卵黄抗体,研究其治疗效果。以猪繁殖与呼吸综合征灭活苗免疫产蛋鸡,采用ELISA方法检测卵黄抗体效价,收集高效价卵黄,采用氯仿抽提和硫酸铵盐析法纯化卵黄抗体。ELISA方法测定收集抗体效价为1∶8 000,测定纯化的抗体浓度为7.85mg/mL,微生物学检验及安全性试验表明制备的卵黄抗体安全可靠,人工感染治愈率和临床应用治愈率分别为100%和89.1%,表明制备的卵黄抗体对猪繁殖与呼吸综合征具有显著的治疗效果。 相似文献
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For developing immunoglobulin yolk powder products to prevent and treat the diarrheal piglets, and appling the advanced technology of egg yolk antibody to the husbandry and aquaculture, two types of compound immunoglobulin yolk powder were used to prevent and treat the diarrhea piglets which were challenged with ETEC, PEDV and TGEV.The creep feed added with 0.4% typeⅠimmunoglobulin yolk powder was provided to experimental piglets.There was no death after challenging the piglets with ETEC or virus, only 5 minor diarrhea in piglets in the early infection.As feeding continuing, the 5 piglets diarrhea quickly brought under control, conversely, the piglets in negative control group were totally dead.The immunoglobulin yolk powder type Ⅱ mixed with GNS at the rate of 1∶3 was used to cure the diarrhea piglets, 20 mL per piglet and 2 times a day.After curing for 3 days, the diarrhea was greatly improved, for 5 days the piglets diarrhea was basic recovery, and the survival rate could reach 84% to 88%.Dectected the infected of surviving piglets, compared to the drug treatment control group, prevention group had the lowest pathogen amounts, and the drug treatment control group had the most serious infected. 相似文献
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Tokarzewski S 《Polish journal of veterinary sciences》2002,5(3):151-158
In the chicken, maternal antibodies are transferred into the egg and subsequently transported into the developing embryo. IgG (called IgY) is the primary immunoglobulin isotype of the egg yolk. Their level in serum depends on the correct function of immunological system in laying hens. Many factors have a direct or indirect influence on antibody level in fowl. One of them is a commonly used antibiotic, but its influence on avian immune system is still unknown. The objective of the study was to determine the effect of enrofloxacin and chloramphenicol on the level of IgY antibody in serum and egg yolk after immunostimulation of hens with living cells of Salmonella enterica subsp. enterica serovar Enteritidis and lipopolisaccharide. Forty adult egg-laying Arbor Acres and Isa 215 hens (32 and 50 weeks old) from the reproductive flocks and 1640 of their eggs were used for the investigation. No clinical symptoms of any diseases were observed in birds during the entire breeding period. Additionally the birds were checked as free from Salmonella spp. in the beginning of the experiment. The birds were divided into 6 experimental and 2 control groups (5 birds in one group). The hens in the experimental groups were immunized with S. Enteritidis antigens: living bacteria and lipopolisaccharide and treated with enrofloxacin or chloramphenicol. Antibiotics were administered in drinking water for 10 days (from 3rd to 13th day of experiment). To indicate anti-S. Enteritidis, antibodies in sera and egg yolk were used indirectly on ELISA based on lipopolisaccharide from S. Enteritidis. As conjugate these were applied anti-chicken IgY with horseradish peroxidase and ABTS with H2O2 as obtained. Additionally, to detect antibody in serum, a rapid slide test was used with Pullognost and Enterognost standard antigens made in the laboratory. The study revealed that both antibiotics tested decreased the level of specific IgY in laying hens immunized with living bacteria and lipopolisaccharide. It seems that antibiotics have a suppressive effect on the immunological system. The strongest immunosuppressive effect was exerted by chloramphenicol. 相似文献
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应用抗猪流行性腹泻病毒（ＰＥＤＶ）单克隆抗体（ＭｃＡｂ）杂交瘤细胞株诱生腹水ＭｃＡｂ,将３株单抗混合,用于实验室防治试验。结果表明,其对病毒具有中和作用,可使病猪耐过ＰＥＤＶ的侵袭;用于生产场的发病猪,初步证明疗效显著,保护率达９１％,而未注抗体的对照发病猪全部死亡。上述结果表明,抗猪流行性腹泻病毒ＭｃＡｂ混合制剂确能缓解发病症状,减少新生猪的死亡。 相似文献