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1.
为了研究姬松茸多糖对鸡疫苗免疫力和红细胞免疫功能的影响,将试验鸡随机分为三组:对照组用新城疫Ⅳ冻干苗及新城疫灭活疫苗进行免疫;Ⅱ组和Ⅲ组同样进行免疫,同时分别皮下注射0.8%和8%的姬松茸多糖灭菌溶液0.25mL/只.于免疫前及免疫后的第4、11和18天,分别检测ND抗体效价及红细胞C3b受体花环率.结果表明,第Ⅱ组在免疫后的第4至第18天,抗体水平一直处于上升趋势,且在第18天抗体水平显著高于对照组(P<0.05),其它各组差异不显著;各组之间红细胞C3b受体花环率差异不显著.这说明一定浓度的姬松茸多糖直接作为免疫佐剂可以提高鸡疫苗的免疫力,且免疫力维持的时间持久,但未见有明显的增强红细胞免疫功能的作用.  相似文献   

2.
为测定蓝黄青口服液(LHQY)对鸡传染性喉气管炎(ILT)免疫以及红细胞免疫力的影响,试验分为4组,分别为对照组、LHQY(浓度为1∶1500)饮水组、鸡传染性喉气管炎和鸡痘基因工程活载体疫苗免疫组和二者同时给予组.结果显示,LHQY给药后3d就能极显著提高健康鸡的RBC-CR1花环率和RBC-IC花环率(P＜0.01),并且这种作用效果可以持续20d以上;与疫苗同用,RBC-CR1花环率和RBC-IC花环率均显著或极显著高于健康对照组和疫苗组(P＜0.05,P＜0.01).进行攻毒保护试验,发现LHQY用药组的RBC-CR1花环率和RBC-IC花环率均极显著高于感染对照组(P＜0.01),LHQY与疫苗混合使用这两种花环率也极显著高于感染对照组(P＜0.01),并整体高于疫苗组.说明蓝黄青口服液能显著提高鸡红细胞免疫功能,对ILT有很好的预防和治疗作用.  相似文献   

3.
传染性喉气管炎疫苗免疫对鸡红细胞免疫功能状态的影响   总被引：9，自引：0，他引：9  
选择健康仔鸡40只，随机分为4组，每组10只。Ⅰ组为健康对照组，Ⅱ－Ⅳ组为不同处理的试验组。在45日龄日，Ⅱ级免疫传染性喉气管炎（ILT）疫苗，Ⅲ组免疫ILT疫苗同时肌肉注射中药免疫增强剂Ⅰ，Ⅳ组免疫ILT疫苗同时肌肉注射中药免疫增强剂Ⅱ。分别在免疫前1天、免疫后第3天和第9天，测定各组鸡的红细胞免疫功能状态。结果发现，试验Ⅱ组的鸡在ILT疫苗免疫后3天，RBC－CR1花环率和RBC－IC花环率显著降低，与其他各组比较差异极显著（P＜0．01）。免疫后9天，RBC－CR1花环率和RBC－IC花环率升高到正常水平；而Ⅲ和Ⅳ组，免疫后RBC－CR1花环率高于I组（P＜0．01、P＜0．05）。说明ILT疫苗免疫会引机体红细胞免疫功能的短暂性降低；疫苗免疫的同时使用中药增强剂能够消除红细胞功能短暂性降低的不良反应。  相似文献   

4.
为了研究姬松茸多糖对雏鸡体内抗细菌感染的作用,试验分为7组,即姬松茸多糖低浓度大肠杆菌试验组(1组)、姬松茸多糖高浓度大肠杆菌试验组(2组)、大肠杆菌对照组(3组)、空白对照组(4组)、姬松茸多糖低浓度巴氏杆菌试验组(5组)、姬松茸多糖高浓度巴氏杆菌试验组(6组)、巴氏杆菌对照组(7组)。1,2,5,6组雏鸡分别灌服低剂量或高剂量的姬松茸多糖,3,4,7组雏鸡分别灌服等量的生理盐水,连续用药14 d,之后除4组外,各组雏鸡分别感染大肠杆菌或巴氏杆菌,观察各组雏鸡的临床症状并记录体重变化。第28天后剖检,测定免疫器官指数,进而研究姬松茸多糖对雏鸡抗细菌感染的效果。结果表明:经细菌感染后,口服高剂量姬松茸多糖组与其他各组相比,雏鸡体重和免疫器官指数变化差异明显。说明口服高浓度姬松茸多糖能够促进家禽免疫器官的发育,进而提高机体的免疫力,对抗细菌感染,可应用到畜牧生产和兽医临床应用中。  相似文献   

5.
选择120只健康仔鸡,随机分成8组,每组15只。Ⅰ组为健康对照,Ⅱ组为接毒对照,Ⅲ-Ⅴ组分别是中药免疫对照(剂量为1％,2％,5％饲料添加),Ⅵ组为疫苗应用对照组,Ⅶ组为中药预防对照组,Ⅷ组为疫苗与中药共同免疫,再接种禽流感病毒,中药应用剂量与方法同Ⅲ组。分别在免疫前1天、免疫后第三天、攻毒后第二天,按郭峰法测定各组鸡的红细胞免疫功能状态。结果试验表明:Ⅱ组攻毒后三天,RBC-cR1花环率和RBC-IC花环率显著降低,相对其他各组差异极显著。Ⅵ组在疫苗免疫后第三天,红细胞免疫功能出现短暂性降低,但在第九天恢复正常。Ⅵ组中药预防组虽然RBc—CR1花环率和RBc—IC花环率降低,相对Ⅰ组(正常对照组)差别不显著,且在第九天,升高到正常水平。Ⅷ组疫苗与中药同时应用,该复方制剂能消除红细胞免疫功能短暂性降低的不良反应。Ⅲ～Ⅴ组(免疫增强组)RBC—CR1花环率和RBC—IC花环率,相对Ⅰ组(正常对照组)差别显著,与其他组差别极显著。结论:接种AIV后会引起鸡红细胞免疫功能降低,该中药复方能增强机体免疫功能的同时,且能消除红细胞免疫功能降低所带来的不良反应。  相似文献   

6.
中药复方制剂对鸡红细胞免疫功能影响的研究   总被引：1，自引：0，他引：1  
选择120只健康仔鸡，随机分成8组，每组15只。Ⅰ组为健康对照，Ⅱ组为接毒对照，Ⅲ～Ⅴ组分别是中药免疫对照(剂量为1％，2％，5％饲料添加)，Ⅵ组为疫苗应用对照组，Ⅶ组为中药预防对照组，Ⅷ组为疫苗与中药共同免疫，再接种禽流感病毒，中药应用剂量与方法同Ⅲ组。分别在免疫前1天、免疫后第三天、攻毒后第二天，按郭峰法测定各组鸡的红细胞免疫功能状态。结果试验表明：Ⅱ组攻毒后三天，RBC—CR1花环率和RBC—IC花环率显著降低，相对其他各组差异极显著。Ⅵ组在疫苗免疫后第三天，红细胞免疫功能出现短暂性降低，但在第九天恢复正常。Ⅶ组中药预防组虽然RBC—CR1花环率和RBC—IC花环率降低，相对Ⅰ组(正常对照组)差别不显著，且在第九天，升高到正常水平。Ⅷ组疫苗与中药同时应用，该复方制剂能消除红细胞免疫功能短暂性降低的不良反应。Ⅲ～Ⅴ组(免疫增强组)RBC—CR1花环率和RBC—IC花环率，相对Ⅰ组(正常对照组)差别显著，与其他组差别极显著。结论：接种AIV后会引起鸡红细胞免疫功能降低，该中药复方能增强机体免疫功能的同时，且能消除红细胞免疫功能降低所带来的不良反应。  相似文献   

7.
目的：观察不同浓度的当归多糖（ASP）对正常罗曼雏鸡免疫功能的影响。方法：将80只1日龄健康罗曼雏鸡随机分为4组,每组20只。分别于1日龄皮下注射生理盐水以及不同浓度的当归多糖,连续注射7 d,于7、14、21、28、35、42、49、56日龄采血,检测红细胞免疫功能。结果：试验结果表明,使用当归多糖后,各试验组红细胞-C3b花环率和红细胞-IC花环率明显升高。浓度为25 mg/mL当归多糖组红细胞C3b花环率和红细胞IC花环率显著高于其他多糖组。结论：当归多糖可提高鸡的红细胞免疫功能,其中以浓度为25 mg/mL当归多糖效果最佳。  相似文献   

8.
试验黄芪多糖对鸡新城疫疫苗免疫后T淋巴细胞的影响。结果显示,试验组鸡的抗体效价均优于对照组。同时,鸡免疫接种新城疫疫苗免疫后,注射黄芪多糖注射液T淋巴细胞CD4+/CD8+的比值变化均高于对照组,试验1组和试验2组之间的差异性不显著。黄芪多糖对鸡新城疫疫苗免疫后T淋巴细胞的分泌具有正向促进作用,能够提高鸡新城疫免疫效果,在今后临床防治中值得推广应用。  相似文献   

9.
为探讨米糠多糖对鸡免疫功能的影响,选用100只10日龄京白939蛋雏鸡,随机平均分为4组。Ⅱ、Ⅲ、Ⅳ组从10日龄起分别灌服低、中、高3个剂量米糠多糖(50、100和200mg/(kg.d)),每天一次性灌服规定剂量,连续5d;Ⅰ组同时灌服生理盐水作为对照,1mL/只。在灌服米糠多糖前1d和灌服后7、14和21d,分别测定雏鸡外周血T淋巴细胞转化能力和血清IgG、IgA和IgM含量。在雏鸡14日龄时,对照组和米糠多糖处理组均实施新城疫(ND)疫苗免疫,间隔1周后进行禽流感(AI)疫苗免疫。分别在ND疫苗和AI疫苗免疫前1d和免疫后7、14和21d测定ND抗体和AI抗体效价。结果显示:(1)雏鸡灌服3个不同剂量米糠多糖后的7、14和21d,外周血T淋巴细胞转化能力均显著高于对照组(P<0.05或P<0.01),且以100mg/(kg.d)剂量组效果最好。(2)雏鸡服用3个剂量组米糠多糖后7、14和21d,血清IgG含量均高于对照组(P<0.05或P<0.01);血清中IgA含量,在14d时,低剂量组与对照组无显著差异,中、高剂量组显著高于对照组(P<0.05或P<0.01);IgM含量在灌服米糠多糖后7d时,Ⅳ组高与对照组无差异(P>0.05);14d时,Ⅲ组与对照组无差异(P>0.05);米糠多糖其他剂量组在7和14d,血清IgM含量均高于对照组(P<0.05或P<0.01);21d时,米糠多糖处理组与对照组比较无显著差异。(3)雏鸡服用米糠多糖可以提高ND疫苗和AI疫苗免疫后的特异性抗体效价,且免疫效果与米糠多糖剂量呈正相关。试验结果表明,米糠多糖能够从促进蛋雏鸡外周血T淋巴细胞转化功能、提高血清免疫球蛋白含量以及提高疫苗免疫特异性抗体效价等方面调节健康雏鸡的免疫功能。  相似文献   

10.
为了研究姬松茸多糖对小鼠急性肝损伤的保护作用及其毒性反应，我们设计了两个试验方案：第一，先用四氯化碳(CCl4)攻毒后立即注射姬松茸多糖；第二，给小鼠注射不同高剂量的姬松茸多糖后在攻毒。结果表明：攻毒组GPT活性显著高于对照组，证实姬松茸多糖具有护肝作用；一定剂量范围内的姬松茸多糖未见有毒性反应，且对肝脏的保护呈现良好的量效关系。  相似文献   

11.
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。  相似文献   

12.
The consequence of cryptosporidiosis on the immune response of vaccinated chickens against Newcastle disease and/or avian influenza was studied by using 240, 1 day old, male, white Hy-Line chicks and divided into 8 groups and subgroups. Each group or subgroup was consisting of 30 chicks (15?×?2 replicates). The first and second groups were kept as unvaccinated control, G1uninfected and G2 infected. G3, G4 and G5 contained 2 subgroups A&B (G3A, G3B, G4A, G4B, G5A and G5B). Chicks of subgroup A were vaccinated only while chicks of subgroup B were infected and vaccinated. These chicks were orally inoculated with 5?×?105 oocysts of Cryptosporidium baileyi (C. baileyi) at 2 days of age. Chickens were vaccinated intraocular with live Newcastle disease (ND) vaccine (Hitchner on day 7th and LaSota on day 17th of chicken life) (G3) or vaccinated by subcutaneous route with Volvac®- H5N2- AI vaccine on day 10 of chicken life (G4). Last group (G5) was infected similarly and vaccinated with ND and AI vaccines with the same day, dose and route of vaccination for each one. Random blood samples were collected for 3 weeks post-vaccination for investigation of humoral immune response against Newcastle and/or avian influenza vaccines by the haemagglutination inhibition (HI) test. The results showed that H5N2 vaccine at day 10 of chicken life is effective in chickens indicated by the geometric mean of HI titer against AI virus. The findings of this study showed that the infection with Cryptosporidia in the broiler chicken has a depressive effect on the immune status of the birds vaccinated against ND and/or AI vaccination. Moreover, the obtained protection rates against challenge with virulent ND virus observed to be parallel to the results of HI- test. Also, by using 2 different antigens (one commercial and field prepared antigen) to avian influenza virus, lower Geometric mean (GM) HI titer were appeared in infected and vaccinated group than vaccinated group only. A study of the relative lymphoid organs weight such as bursa of Fabricius from the experimental chicks indicated that those organs were comparable between the groups infected-vaccinated and vaccinated only. Non significant variations in final live weight between uninfected control and infected groups were indicated. Also, H5N2-AI vaccination at 10 days old did not affect the final live weight. ND and/or AI Vaccination could not be a substitute to application of good hygienic measures and fecal examination of the birds especially for protozoal diseases such as cryptosporidiosis. It could be concluded that cryptosporidiosis could be one cause of ND and/or AI vaccination failure in poultry farms.  相似文献   

13.
The aim of this study was to develop a strategy to control Newcastle disease (ND) in free ranging village chickens using the Nobilis ND Inkukhu vaccine (Intervet South Africa). The study was conducted at Thibella village in Qwa-Qwa, South Africa from April 2001 to October 2002. Three different routes of vaccination (administration via eye-drop, drinking water and feed) were investigated. The haemagglutination inhibition (HI) test was conducted monthly in order to measure the antibody response of village chickens after immunization against Newcastle disease. Using a South African isolate of velogenic ND virus, challenge trials were conducted to determine the efficacy of the vaccine. A questionnaire was provided to evaluate perceptions of farmers on vaccinations. The eye-drop vaccination route produced the highest HI titres ranging between 2.7 and 4.4, followed by the drinking water vaccination route with titres ranging between 2.3 and 4.0. The lowest titres were from the feed vaccination route which ranged between 1.6 and 3.0. Following the challenge, the entire control group died on the third and fourth day after infection. However, 70% of the chickens immunized by using either the eye-drop or drinking water route survived the challenge. Only 20% of the chickens from the group immunized through the feed route survived. Evidently both the eye-drop and drinking water routes were efficient in preventing disease. Necropsies showed that vaccinated chickens had mild lesions whilst control chickens had severe lesions compatible with Newcastle disease. The efficacy of the vaccine using either of the routes can be enhanced by administration of booster vaccinations at 3-month intervals during the first year of a vaccination campaign and then at 6-month intervals from the second year onwards. The majority of the owners indicated that they would prefer to vaccinate their flocks using the drinking water route.  相似文献   

14.
兔病毒性出血症蜂胶佐剂组织灭活苗的免疫效果   总被引：1，自引：0，他引：1  
用ＰＭＶＲＶＨＤ和ＶＲＶＨＤ分别免疫家兔，用Ｅ－玫瑰花环形成试验测定细胞免疫水平（Ｔｃ），用微量血凝抑制试验（ＨＩ）进行体液免疫水平测定。并于免疫后期（第１６５ｄ和第１８７ｄ），用ＲＶＨＤ强毒对不同家兔分别进行攻击试验。结果发现：ＰＭＶＲＶＨＤ组（Ａ组）家兔Ｅ－玫瑰花环形成率显著高于ＶＲＶＨＤ组（Ｂ组）（Ｐ＜０．０１）；Ａ组家兔血清ＨＩ值极显著地高于Ｂ组（Ｐ＜０．０１）。同时，试验组家兔的细胞免疫先于体液免疫出现。在第１８７ｄ的攻击试验中，Ａ组家兔全部健活，Ｂ组家兔死亡２只，其余５只则有不同程度的发热表现。结合细胞免疫和体液免疫的测定结果，认为ＰＭＶＲＶＨＤ对家兔的免疫效果比ＶＲＶＨＤ更好。  相似文献   

15.
The humoral immune response and immunity conferred in chicks were compared following separate and combined oral vaccination with F strain of Newcastle disease virus (NDV) and HP1 strain of fowl pox virus. The haemagglutination inhibition (HI) antibody titre against NDV and passive haemagglutination (PHA) antibody titre against fowl pox virus were comparable in two respective groups. The serum IgG concentration increased significantly after the second vaccination in all the groups. The NDV vaccine induced significantly higher IgG production as compared to fowl pox virus vaccine. There was no significant difference in serum IgG concentration produced by combined vaccine and separate F strain vaccine. The protection afforded by combined and separate vaccinations did not vary significantly against challenge with virulent strains of NDV and fowl pox virus at different stages.  相似文献   

16.
Two experiments were conducted to determine the effect of breeder vaccination program and maternal antibody on the efficacy of Newcastle disease immunization of 1-day-old chicks. Experimental protocol was the same for both. In the first experiment, broilers were from breeders that were 32 weeks old, and in the second experiment, broilers were from breeders 50 weeks old. Breeders received three live Newcastle disease virus (NDV) vaccines and either a killed vaccine at 18 weeks or continual live boosting at 60-to-70-day intervals through lay. Broilers were vaccinated at 1 day of age with a commercial coarse-spray machine; they were bled, sera were examined for antibody against NDV, and broilers were challenged with virulent NDV at 2, 4, and 6 weeks of age. In the first experiment, maternal antibody was higher in chicks from the younger breeders given the inactivated vaccine, and in the second experiment maternal antibody was higher in chicks from older breeders given continual live vaccines. Higher antibody in 1-day-old broilers resulted in fewer vaccine-induced reactions, less vaccine virus shed, and decreased duration of vaccine-induced immunity from coarse-spray vaccination.  相似文献   

17.
Broiler chicks were administered vaccines against Newcastle disease and infectious bronchitis (both Arkansas and Massachusetts strains) at 2 weeks of age as either primary or secondary vaccinations. The vaccine was administered as a spray at 2 weeks of age to chicks that had received Newcastle disease vaccine alone, bronchitis vaccine alone, both vaccines in combination, or no vaccine at day 1 in the hatchery. The Newcastle disease hemagglutination-inhibition response was significantly lower in chicks receiving Newcastle disease vaccine as a secondary vaccine at 2 weeks than in those receiving the vaccine as a primary vaccination at that age. In contrast, the bronchitis hemagglutination-inhibition response was significantly higher in chicks receiving bronchitis vaccine as a secondary vaccination at 2 weeks than in those receiving the vaccine as a primary vaccination at that age.  相似文献   

18.
The present study was conducted to assess the haemagglutination-inhibition (HI) titres required to protect the chicken reproductive tract against direct damage caused by Newcastle disease virus (NDV). Precociously induced oviduct and uterus by oestrogen treatment of young chicks were used to assess the damage or protection against the damage by analysis of ciliostasis or histopathological lesions. Unvaccinated day-old female white leghorn chickens were used as the maternally derived antibody (MDA) group. Chickens were vaccinated with either a live lentogenic vaccine on day 14 of age or, along with it, an inactivated vaccine at day 36 of age, to generate birds with a range of primary or secondary response induced HI antibodies. Birds with different HI antibody levels were challenged with virulent NDV. It was found that a HI antibody titre of 128 and above was protective against direct damage of the reproductive tract, while the 32–64 titre range was protective when derived through secondary vaccination only.  相似文献   

19.
Meat chickens housed on a commercial broiler farm in Australia were vaccinated once at 10 to 11 days-of-age by aerosol with live V4 Newcastle disease virus (NDV) vaccine. Groups of vaccinated and unvaccinated birds were flown to Malaysia, where they were challenged with a virulent strain of NDV. Survival rates in vaccinated chickens challenged 7, 14, 21 or 31 d after vaccination were 0.47, 0.77, 0.97 and 0.92, respectively. All unvaccinated chickens died due to Newcastle disease (ND) following challenge. Chickens in Australia and Malaysia were bled and the serums tested for haemagglutination-inhibiting (HI) antibody to NDV. Many vaccinated birds with no detectable antibody, and all birds with a log2 titre of 2 or greater, survived challenge. The results showed that this V4 vaccine induced protective immunity in a significant proportion of chickens within 7 d of mass aerosol vaccination. This early immunity occurred in the absence of detectable circulating HI antibody. Non-HI antibody mediated immunity continued to provide protection up to 31 d after vaccination. Almost all vaccinated birds were protected within 3 w of vaccination. It is concluded that the V4 vaccine is efficacious and could be useful during an outbreak of virulent ND in Australia.  相似文献   

20.
采用 E- 3b R花环试验 ,E- IC花环试验对饲喂 0 .5 %泻痢康 2 0 d的实验鸡和对照鸡的红细胞的免疫功能进行检测。结果发现 ,试验组和对照组鸡红细胞 C3b R致敏酵母花环率分别为 ( 4 .91± 1 .85 )与 ( 4 .31± 0 .6 4 ) ;试验组和对照组鸡红细胞未致敏酵母花环率分别为 ( 1 6 .5 0± 4.5 6 )与 ( 7.2 6± 2 .6 1 )。试验结果表明使用泻痢康饲喂鸡 ,不仅可有效地减少鸡下痢 ,而且可使鸡红细胞 C3b受体花环率增高 ,增强红细胞的免疫功能。  相似文献   

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