缓释复方免疫增强剂对鸡减蛋综合征疫苗免疫增强效果研究

将60只120日龄海兰褐蛋鸡,随机分成试验组和对照组,每组30只.分别肌肉注射鸡减蛋综合征(EDS-76)灭活疫苗0.5 mL/只,同时给试验组雏鸡投服缓释复方免疫增强剂1粒/只,对照组不投服.在免疫前、免疫后10、20、30和40 d,每组随机取10只鸡采血,测定EDS-76抗体效价、T淋巴细胞ERFC形成率和ANAE阳性率.结果免疫后10、20、30和40 d,试验组与对照组比较,鸡EDS-76抗体效价、T淋巴细胞ERFC形成率和ANAE阳性率差异极显著(P<0.01)或显著(P<0.05),三项指标具有相同的消涨趋势.表明缓释复方免疫增强剂可以提高鸡的体液免疫功能和细胞免疫功能.     

缓释复方免疫增强剂对鸡ND—IB二联弱毒疫苗免疫增强效果研究

80只30d龄蛋鸡随机均分成试验组和对照组,分别皮下注射ND—IB二联弱毒疫苗2头份／只,同时给试验组鸡投服缓释复方免疫增强剂1粒／只,对照组不投服。在免疫前、免疫后10d、20d、30d和40d,采血测定发现免疫后不同时期鸡ND、IB抗体效价和T淋巴细胞ERFC形成率试验组显著或极显著高于对照组,表明缓释复方免疫增强剂可以提高鸡体液免疫功能和细胞免疫功能。     

鸡用缓释复方免疫增强剂的筛选试验研究

选择14日龄雏鸡110只,随机均分为11组,Ⅰ组为对照组,Ⅱ～Ⅺ为试验组,各组雏鸡在14日龄时均颈部皮下注射鸡ND—La Sota疫苗0．2ml／只．试验组雏鸡同时经口投服由不同配方和比例黄芪多糖、淫羊藿多糖、左旋咪唑、维生素E和亚硒酸钠制备的10种缓释复方免疫增强剂1粒,对照组雏鸡不投服。在免疫前后不同时间采血测定各组雏鸡ND—HI抗体效价和T淋巴细胞ANAE阳性率．结果表明制备的10种缓释复方免疫增强剂均不同程度地提高了雏鸡ND—HI抗体效价和T淋巴细胞ANAE阳性率．其中以X组和Ⅺ组配方效果最好,为今后研制缓释复方免疫增强剂奠定了基础。     

缓释复方免疫增强剂对鸡传染性法氏囊病疫苗免疫增强效果研究

将100只20日龄海兰褐蛋雏鸡随机分成试验组和对照组．分别肌肉注射IBDB87疫苗0．5mL／只,同时给试验组雏鸡投服缓释复方免疫增强剂l粒／只．对照组鸡不投服．在免疫前和免疫后10、20、30d,每组随机采血．测定鸡IBD抗体阳性率、T淋巴细胞ERFC形成率、脾脏和法氏囊指数。结果表明．免疫后不同时期鸡IBD抗体阳性率、T淋巴细胞ERFC形成率、睥脏和法氏囊指数试验组显著或极显著高于对照组．说明缓释复方免疫增强剂可以提高鸡体液免疫功能和细胞免疫功能．促进免疫器官生长发育．     

缓释复方免疫增强剂对鸡传染性法氏囊病疫苗增强效果研究

100羽20日龄海兰褐蛋雏鸡随机均分为试验组和对照组,均肌肉注射IBDB87疫苗0.5mL/羽,同时给试验组雏鸡投服缓释复方免疫增强剂1粒/羽。在免疫前、免疫后10、20和30d,每组随机采血20羽,测定IBD抗体阳性率、T淋巴细胞ERFC形成率、脾脏和法氏囊指数。结果2组鸡上述测定指标具有相同的消涨趋势,且试验组显著或极显著高于对照组,表明缓释复方免疫增强剂可提高鸡体液和细胞免疫功能,促进免疫器官生长发育。     

缓释复方免疫增强剂田间免疫试验研究

选择24000只蛋用雏鸡，分4组进行田间免疫试验，每组设50只雏鸡作为对照，所肴雏鸡按常规免疫程序免疫，在20日龄肌注鸡ND—IB二联苗时，试验组雏鸡投服缓释复方免疫增强剂1丸／只，对照组免疫时不投丸，分别在投丸前、投丸后15d和30d呆血测定血清中ND、IB抗体水平和IBD抗体阳性率。结果投丸前雏鸡血清中ND、IB抗体水平及IBD抗体阳性率试验组与对照组差异不显著（P〉0．05），投丸后15d雏鸡血清中ND、IB抗体水平试验组分别比对照组高1．1和1．3个滴度，IBD抗体阳性率提高10％，差异显著（P〈0．05）。30d雏鸡血清中ND、IB抗体水平试验组分别比对照组高1．2和1．2个滴度，IBD抗体阳性率提高10％，差异显著（P〈0．05）。分别减少鸡发病率和死亡率6．7个百分点和5个百分点。表明缓释复方免疫增强剂能够提高鸡的免疫力，增强蛋鸡体液免疫功能，提高抗体水平，延长疫苗免疫保护期，减少发病率和死亡率，具有显著的经济效益。     

缓释复方免疫增强剂对鸡新城疫疫苗免疫增强效果研究

将40只10日龄海兰褐蛋雏鸡，随机分成试验组和对照组，每组20只，分别皮下注射ND-La Sota弱毒疫苗0．2ml／只。同时给试验组雏鸡投服缓释复方免疫增强剂1粒／只，对照组不投服。在免疫前、免疫后10、20、30和40d，每组随机取10只鸡采血，测定ND-HI抗体效价、T淋巴细胞ERFC形成率和ANAE阳性率。结果免疫后10、20、30、40d，试验组与对照组比较，鸡ND-HI抗体效价、T淋巴细胞ERFC形成率和ANAE阳性率差异极显著（P〈0．01）或显著（P〈0．05），三项指标具有相同的消涨趋势，表明缓释复方免疫增强剂可以提高鸡的体液免疫功能和细胞免疫功能。     

不同剂型的复合免疫增强剂对鸡新城疫疫苗免疫增强作用的效果观察

选择健康仔鸡40羽,随机分成4组,每组10羽。Ⅰ组为对照组,Ⅱ-Ⅳ组为试验组,在试验仔鸡20日龄时,所有仔鸡在颈部皮下注射用生理盐水稀释的ND--Lasota弱毒冻干苗,Ⅱ组在饮水中加入复合免疫增强粉制荆,Ⅲ组在颈部皮下注射复合免疫增强针制荆,Ⅳ组投服复合免疫增强缓释制荆。分别于免疫后10、20、30和40d,采血测定ND—HI抗体和外周血T淋巴细胞ANAE阳性率。实验结果表明,试验组比对照组ND—HI抗体明显提高。针剂组在免疫前期抗体的上升比较明显,缓释制剂组抗体效价上升比较平稳,维持时间相对延长。同时。T淋巴细胞ANAE阳性率与HI抗体效价有相应的消涨趋势。由此可见,不同剂型的复合免疫增强荆对鸡ND疫苗的免疫增强作用不同,但是免疫增强效果却很显著。     

5种禽用多联疫苗的安全性和免疫效力试验

鸡新城疫 (ND)、鸡传染性法氏囊病 (IBD)、鸡传染性支气管炎(IB)、减蛋综合征 (EDS-76)和鸡马立克氏病 (MD)是危害养禽业的几种主要传染病。疫苗免疫是防止疫病爆发的主要措施和关键环节 ,多年的实践证明 ,优质高效的疫苗能有效地预防传染病的发生。我们对梅里亚动物保健有限公司生产的 5种禽用油乳剂灭活疫苗进行了安全性和免疫效力试验 ,现报道如下。1　材料和方法1.1　疫苗IB -ND -IBD三联灭活苗 ,批号为OBPT5D0 2 1;新一代IB-ND -IBD -EDS-76四联灭活疫苗 ,批号为OBGP5D0 2 1;IB -ND -IBD -EDS-76四联灭活疫苗 ;MD…     

复方鸡脾组织提取液及紫术散对鸡新城疫疫苗的增益效应

复方鸡脾组织提取液和中药紫术散可使鸡新城疫(ND)疫苗诱导的鸡血清抗体效价显著上升,维持时间延长,并能提高鸡外周血B淋巴细胞EAC花环形成率、T淋巴细胞ANAE阳性率和大颗粒淋巴细胞(LGL)的百分率.由此认为,这两种制剂对鸡ND苗诱导的体液免疫和细胞免疫都具有促进效应,可作为免疫增效剂.     

鸡新城疫－传染性支气管炎－传染性法氏囊病三联灭活疫苗对不同日龄雏鸡的免疫效力研究

为评估鸡新城疫（ND）-传染性支气管炎（IB）-传染性法氏囊病（IBD）三联灭活疫苗对不同日龄和不同水平母源抗体雏鸡的免疫效力和持续期,本试验用该疫苗免疫7、14、21日龄SPF雏鸡和有母源抗体的普通雏鸡,免疫后采血测定ND血凝抑制抗体（HI Ab）、IB血凝抑制抗体（HI Ab）及IBD中和抗体（NA）,并用传染性法氏囊病病毒（IBDV）强毒攻击。结果显示,7日龄SPF雏鸡免疫后21 d ND HI抗体、IB HI抗体及IBD中和抗体效价分别为7.9log2、6.9log2和14.1log2,SPF鸡日龄越大,抗体水平越高;28日龄SPF鸡免疫后3个月,0.3 mL免疫剂量组试验鸡ND HI、IB HI及IBD中和抗体效价分别达6.5log2、6.1log2和13.6log2,IBDV攻毒保护率均为100%（10/10）;不同日龄普通雏鸡免疫效果与SPF鸡试验一致,抗体水平随鸡日龄增大而升高,IBD攻毒保护率也都达到100%（10/10）。试验结果证实,鸡新城疫-传染性支气管炎-传染性法氏囊病三联灭活疫苗可使7、14及21日龄SPF雏鸡和普通雏鸡产生良好的免疫力,对雏鸡的免疫期至少为3个月。     

Study on Synergistic Effect of VA5 Immunopotentiator on Pigeon NDV Inactivated Vaccine

This study was designed to evaluate the synergistic effect of VA5 immunopotentiator on pigeon ND4416 inactivated vaccine.160 healthy pigeons were randomly divided into four groups,including ND4416 strain inactivated vaccine group (NDV group),ND4416 strain inactivated vaccine and immunopotentiator (VA5) mixed group (NDV+VA5 group),La Sota inactivated vaccine group (La Sota group) and normal saline as the control group (C group),to assess their vaccine efficacy against virulent pigeon NDV by serological analysis and animal testing.Pigeons sera were collected at different time points after immunization and measured the HI antibody titer of each group.The results showed that VA5 immunopotentiator significantly improved the serum antibody level of pigeons immunized with pigeon Newcastle disease inactivated vaccine (P<0.05).In addition,comparative test of spleen lymphocyte transformation was conducted at various time points after immunization.The results indicated that VA5 effectively stimulated the lymphocyte transformation of immune pigeon.Pigeons in each groups were challenged with ND4416 strain at the 30th,90th and 180th d after immunization.The results presented that the NDV+VA5 group had 100% protection rate and higher than La Sota group.The duration of immunization test showed that the antibody titer of NDV+VA5 group reached peak 11.20log₂ at the 21st d,remained 7.50log₂ at 180th d,and the protection rate remained 100% at 180th d.It indicated that VA5 immunopotentiator sustained the immune duration of pigeon NDV vaccine up to 180 d.Moreover,the in vitro detoxification test results suggested that VA5 immunopotentiator reduced the in vitro detoxification cycle of pigeons after challenge.Overall,this study suggested VA5 immunopotentiator could significantly improve the immune efficacy of pigeon Newcastle disease inactivated vaccine,which provided a basis for further enhancing the efficacy of Newcastle disease vaccine,as well increased experimental data for the application of immunopotentiators.     

VA5免疫增强剂对鸽新城疫病毒灭活疫苗的增效作用研究

试验旨在探究VA5免疫增强剂对鸽新城疫病毒（NDV）灭活疫苗（ND4416株）的免疫增效作用。选取160只健康鸽随机分为4组：ND4416株灭活疫苗组（NDV组）、ND4416株灭活疫苗与免疫增强剂（VA5）混合组（NDV+VA5组）、La Sota灭活疫苗组（La Sota组）及生理盐水空白对照组（C组）,进行免疫效力及免疫持续期试验。采用血凝抑制试验检测各组鸽免疫后不同时间点的血清抗体效价,结果显示,VA5免疫增强剂能够显著提高鸽NDV灭活疫苗血清抗体水平（P<0.05）。脾脏淋巴细胞转化试验结果显示,VA5能够有效刺激免疫鸽的淋巴细胞转化。在免疫后第30、90、180天,各组鸽子采用ND4416株进行攻毒试验,结果显示,NDV+VA5组在3个时间点的攻毒保护率均为100%,均高于La Sota组。免疫持续期试验结果显示,NDV+VA5组血清抗体水平在免疫后第21天达峰值11.20log₂,第180天仍能达到7.50log₂,攻毒保护率达100%,表明VA5免疫增强剂可延长鸽新城疫疫苗的免疫效力持续期至180 d。攻毒后体外排毒检测结果表明,VA5免疫增强剂能够缩短攻毒后鸽的体外排毒周期,减少体外排毒。综上,VA5免疫增强剂能够显著提高鸽NDV灭活疫苗的免疫效果,为研制效果更好的鸽NDV疫苗提供了基础依据,同时也为免疫增强剂的应用增加了试验数据。     

鸡ND-IB-IBD三联弱毒冻干疫苗效力试验

本研究对研制的鸡ND-IB-IBD三联弱毒冻干疫苗进行了效力检验,结果表明该疫苗7 d可产生对ND和IB的免疫力,14 d对ND和IB强毒攻击保护率均为100%;对IBD的保护率为70%,可以有效预防鸡ND、IB和IBD三种传染病的发生。     

Study on the Immunity Effect of Infectious Bursal Disease Immune Complex Vaccine on One-day Old Moderate Maternal Antibody Chick

One-day-old moderate maternal antibody Jinghong chickens and SPF chickens were vaccinated with infectious bursal disease (IBD) immune complex (IC) vaccine and BX strain live vaccine,respectively,pathological changes of bursa of fabricius in chickens were observed at the 9th day after immunization.On the 28th day after immunization,blood samples were taken and the IBDV neutralizing antibody were tested,meanwhile experimental chickens were challenged with high virulent IBDV,the protective rates of experimental groups were calculated.The results showed that at the 9th day after immunization,the bursa of fabricius in SPF and Jinghong chickens were normal in IC vaccine group,however atrophic changes of bursa of fabricius in BX strain live vaccine group were shown.At the 28th day after immunization,the IBDV neutralizing antibody of IC vaccine group and BX strain live vaccine group in SPF and Jinghong chickens were 9.2log2,8.5log2,7.2log2 and 4.4log2,respectively,while 100% protection rates were provided.The results provided that IC vaccine had better immunity effect on one-day-old moderate maternal antibody chicken,high levels of neutralizing antibodies against IBDV were produced and protection rates were 100%.     

鸡传染性法氏囊病免疫复合物疫苗对1日龄中等母源抗体水平雏鸡免疫效果的研究

将鸡传染性法氏囊病免疫复合物疫苗和BX株活疫苗分别免疫1日龄中等母源抗体水平京红雏鸡,同时免疫1日龄SPF雏鸡作对照,免疫后第9天观察法氏囊病变,免疫后第28天采血测定IBDV中和抗体,并用强毒攻击,计算各组疫苗保护率。结果显示,免疫后第9天,免疫复合物疫苗组SPF雏鸡和京红雏鸡法氏囊均正常,BX株活疫苗组SPF雏鸡法氏囊出现了萎缩病变;免疫后第28天,对照SPF雏鸡和京红雏鸡的免疫复合物疫苗组、BX活疫苗组IBDV中和抗体效价分别为9.2log2、8.5log2和 7.2log2、4.4log2,攻毒保护率均为100%。试验结果表明免疫复合物疫苗免疫1日龄中等水平母源抗体雏鸡效果很好,能产生较高的中和抗体,攻毒保护率能达到100%。     

四君子汤和补中益气汤对雏鸡免疫新城疫疫苗的影响

阐明四君子汤和补中益气汤对雏鸡免疫新城疫疫苗的影响。试验选取体质量30~35 g的1日龄海兰白雏鸡150只,饲喂全价饲料,7 d后,将其平均随机分为对照组、四君子汤组和补中益气汤组。对各组雏鸡滴鼻、点眼免疫新城疫活疫苗,免疫2 d后,对照组雏鸡每天给予纯化水,四君子汤组雏鸡每天给予四君子汤,补中益气汤组雏鸡每天给予补中益气汤,按照0.4 mL/kg的剂量连续灌服给药3 d。分别于免疫后第0天、第7天、第14天、第21天和第28天,从各试验组中随机采集10只试验鸡的血液,分离血清,用血凝抑制法测定新城疫抗体效价;翼静脉无菌采血,观察淋巴细胞转化情况,计算淋巴细胞转化率;利用碳廓清法,计算巨噬细胞吞噬率;采用全自动血球分析仪检测外周血白细胞的数量。试验结果显示,四君子汤组和补中益气汤组雏鸡的新城疫病毒抗体效价、外周血淋巴细胞转化率、巨噬细胞吞噬率均较对照组显著升高(P<0.05),白细胞总数无明显变化(P>0.05)。试验表明四君子汤和补中益气汤对雏鸡免疫新城疫疫苗均具有免疫增效作用。     

Study on the Immunity Effect of Immune Complex Vaccine for Infectious Bursal Disease on One-day Old Low Maternal Antibody Chicken

Five kinds of infectious bursal disease (IBD) immune complex (IC) vaccines were prepared with infectious bursal disease virus (IBDV) BX strain mixed with IBDV hyperimmune serum according to a certain proportion (containing 32, 8, 4, 0.5 and 0.125 units IBDV neutralizing antibody, respectively).One-day old low maternal antibody chickens were vaccinated with IBD IC vaccines 1 to 5 and BX strain live vaccine, respectively, pathological changes of the bursa of fabricius in chickens were observed at the 9th day after immunization.On the day of 28 after immunization, blood samples were taken and the IBDV neutralizing antibody were tested, meanwhile all experimental chickens were challenged with high virulent IBDV, the protective rates of vaccines were calculated.The results showed that at the 9th day after immunization, the bursa of fabricius were normal in IC vaccine 1, 2 and 3 groups, however 2/10, 4/10 and 5/10 of pathological changes of the bursa of fabricius in IC vaccine 4, 5 groups and BX strain vaccine group, respectively.At the 28th day after immunization, the IBDV neutralizing antibodies in IC vaccine 1, 2, 3, 4, 5 groups and BX strain vaccine group were 8.34log2, 9.60log2, 9.21log2, 7.88log2, 9.50log2 and 9.12log2, while 90%, 100%, 100%, 80%, 90% and 80% protection rates were provided, respectively.The results showed that IBD IC vaccines 2 and 3 (containing 8, 4 units IBDV neutralizing antibody, respectively) had the best immunity effect on one-day old low maternal antibody chickens, protection rates were both 100%.     

鸡传染性法氏囊病免疫复合物疫苗对1日龄低母源抗体水平雏鸡免疫效果的研究

将鸡传染性法代囊病病毒(IBDV)BX株抗原和IBDV高免血清按一定比例混合,初步制备了无菌的鸡传染性法氏囊病免疫复合物疫苗1~5(分别含有32、8、4、0.5及0.125单位IBDV中和抗体),用鸡传染性法氏囊病免疫复合物疫苗1~5及BX株活疫苗分别免疫1日龄低母源抗体水平雏鸡,免疫后9 d观察法氏囊病变,免疫后28 d采血测定IBDV中和抗体,并用强毒攻击,计算各组疫苗保护率。结果显示,免疫后9 d,复合物疫苗1~3免疫组鸡法氏囊正常,复合物疫苗4、5免疫组和BX株活疫苗免疫组分别有2/10、4/10和5/10的试验鸡法氏囊出现了病变;免疫后28 d,复合物疫苗1~5免疫组和BX株活疫苗免疫组IBDV中和抗体效价分别为8.34log2、9.60log2、9.21log2、7.88log2、9.50log2和9.12log2,攻毒保护率分别为90%、100%、100%、80%、90%和80%。试验结果表明鸡传染性法氏囊病免疫复合物疫苗2、3(分别含8、4单位IBDV中和抗体)免疫1日龄低母源抗体水平的雏鸡效果最好,攻毒保护率能达到100%。     

鸡新城疫、传染性支气管炎、减蛋综合征、传染性脑脊髓炎四联灭活疫苗IB部分效力试验研究

采用《进口兽药质量标准》中传染性支气管炎灭活疫苗效力检验方法,对ND-IB-EDS76-AE四联灭活疫苗IB部分进行了效力检验。先用IBH120活疫苗作基础免疫,免疫后3～4周采血,然后用四联苗加强免疫,四联苗免疫后3～4周采血,将二次血清分别作IBHI试验。结果显示,IBH120活疫苗免后3～4周,其IBHI效价为3．6～4．610g2（1：12—1：24）,用四联苗加强免疫3～4周后,IBHI达6．2—8．610g2（1：74～1：388）,四联苗免后的IBm抗体滴度比免前提高了4．9～26倍,均大于3倍的标准。试验证明,该方法用于四联苗内IB部分效力检验是可行的。