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1.
后海穴注射灭活苗同时点眼Lasota弱毒苗，对1日龄和5日龄AA肉仔鸡进行免疫。通过血清HI抗体的测定和强毒攻击发现，至免后42天HI抗体效价仍然维持较高水平且强毒攻击全部保护。通过与颈部皮下注射灭活苗同时Lasota点眼组进行对比发现，后海穴免疫组不但能产生较理想的免疫保护力，而且还在增重和病死淘率方面具有优势；而且免后42天解剖灭活苗注射部位没有发现肉芽肿等肉眼可见病变。结论：肉仔鸡在1日龄时用ND灭活苗经后海穴注射同时用ND弱毒苗点眼免疫，就能使肉仔鸡的整个饲养周期中免受ND的侵害。 相似文献
2.
作者对福清、仙游等鸡新城疫疫区37群鸡,共16．9万羽分别用3种具有代表性的免疫程序,以HI（红血球凝集抑制试验）法对大鸡群进行ND抗体追踪监测,结果表明,以弱毒苗做基础免疫时,21日龄注射ND灭活苗比10日龄注射效果更好,现报告如下：1材料Lasota－H_(120)（鸡新城疫—传支）二联苗,I系（新城疫）苗由北京生药厂生产;Lasota－H_(52)（鸡新城疫—传支）二联苗由派斯德公司生产;ND－IB（鸡新城疫—传支）二联灭活苗和ND－IB－EDS（鸡新城疫—传支—减蛋综合症）三联灭活苗,V_4苗由苏威公司提供。NDHI抗原由哈兽研提供。鸡… 相似文献
3.
饮水免疫是预防鸡群疾病较常用的方法。使用时应注意以下几点：1、适合于饮水免疫的疫苗以弱毒苗为佳，如新城疫系、系、克隆30冻干苗、IBD弱毒冻干苗等。灭活苗经口服免疫的效力很低，般不使用饮水免疫法。 相似文献
4.
本试验选用１日龄ＩＢＤ母源抗体参差不齐的伊莎褐壳蛋雏鸡和ＩＢＤ母源抗体水平基本一致的迪卡蛋雏鸡，用ＩＢＤＶ标准Ｉ型弱毒疫苗Ｄ－７８和油乳剂灭活苗进行免疫程序筛选试验。结果表明：１．雏鸡母源抗体参差不齐情况下，３日龄用ＩＢＤ弱毒苗首免，１７日龄用油乳剂灭活苗二免为优良免疫程序。２．雏鸡母源抗体水平基本一致情况下，１４日龄用ＩＢＤ弱毒首免，２４日龄用油乳剂苗二免为优良免疫程序。 相似文献
5.
控制非典型鸡新城疫，用油乳剂灭活苗免疫是切实可行的手段。油乳剂灭活苗免疫后，抗原在体内长时间缓慢释放，可产生坚强而持久的免疫力，即在血清学上可产生高水平且比较均匀的抗体，在临床上，免疫鸡新城疫强毒感染后不患病，产蛋也不下降。较之弱毒疫苗免疫可大大减少免疫次数，减少因非典型鸡新城疫造成的死亡，提高生产性能。为了验证鸡新城疫油乳剂灭活苗的兔疫效果．我们自1993年8月份至1994年12月份，分别在十二个大型养鸡场进行了鸡新城疫弱毒苗免疫和油乳剂死活苗免疫效果对比试验。鸡新城四弱毒苗免疫程序是：1蛋鸡7－14日龄鸡… 相似文献
6.
用四种不同免疫程序免疫肉雏鸡和蛋雏鸡Ａ，分别于３、１０、２１日龄用ＩＢＤ弱毒疫苗饮水免疫Ｂ，于１４、２８日龄用ＩＢＤ弱毒苗饮水Ｃ于３日龄弱毒苗饮水，１０日龄用没乳剂组织灭活苗下接种Ｄ１０日龄用油乳剂灭活苗皮下接种，试验表明，Ｃ、Ｄ两种免疫程序效果极佳，免疫鸡地２１日龄地就能检测出ＡＧＰ抗体，以后抗体上升较快，６０日龄时达高峰，其ＡＧＰ效价最高达１：２＾８．４３，ＲＰＨＩ达１：２＾１６．４３，蛋鸡至 相似文献
7.
应用新城疫Ⅳ系弱毒苗与灭活油佐剂苗分别与新城疫高免卵黄抗体联合免疫;以间接ELISA试验检测它们在机体中抗体出现时间、数量,以及其变化规律。结果表明新城疫Ⅳ系弱毒苗与高免卵黄抗体联合免疫可出现一个抗体阴性期,而新城疫灭活油佐剂苗与高免卵黄抗体联合免疫则不出现这个抗体阴性期。 相似文献
8.
一、犬免疫用生物制品的种类及用法
常见的犬用疫苗有：犬五联弱毒苗、六联弱毒苗、七联弱毒苗。五联弱毒苗用于预防犬瘟热、犬细小病毒性肠炎、犬传染性肝炎、犬副流感和狂犬病。六联弱毒苗较五联弱毒苗的免疫范围增加了犬轮状病毒性肠炎。七联弱毒苗较六联弱毒苗防疫范围增加了犬钩端螺旋体病。三种疫苗均只可注射健康犬。用法为：断奶仔犬间隔2～3周，连续接种2～3次，每次肌注一个剂量，以后每年加强免疫1～2次。犬用灭活菌苗有犬传染性肝炎灭活苗和犬细小病毒灭活苗，因灭活苗的免疫效果不如弱毒苗，近几年在犬免疫接种中用的较少。 相似文献
9.
疫苗免疫与生物安全体系 总被引：1，自引：0，他引：1
1 如何制订免疫程序制订合理的免疫程序 ,目的是提高免疫应答的整齐度 ,避免“免疫空白期”和“免疫麻痹”。下述以猪瘟免疫为例 ,在设计免疫程序时 ,要注意以下几点 :1 .1 有条件的猪场 ,应建立免疫监测手段 ,定期对猪群抽样采取血清作血凝抑制试验 ,从而确定接种疫苗的时间 ,以期获得良好的免疫效果。1 .2 要根据本场发病季节、日龄、发病概率等调整免疫程序。1 .3 注意疫苗的选择 ,如疫苗的毒力 (弱毒、较弱毒、中等毒力 )、疫苗的类型 (如弱毒苗、油佐剂灭活苗 )、疫苗的种类 (如单价苗、联苗 ) ,如果选择联苗 ,还应考虑到其它疫苗… 相似文献
10.
热应激对鸡免疫功能影响的研究 总被引：1，自引：0，他引：1
在不同热应激处理下分别用新城疫油乳剂灭活苗和Ｎ－７９弱毒苗免疫伊莎蛋用雏鸡，各试验组抗体效价和淋巴细胞转化率均有不同程度下降，高温处理２４ｈ的雏鸡，无论用油乳剂灭活苗还是用Ｎ－７９弱毒苗免疫，与对照组间无明显差异，高温处理４８ｈ的油乳剂灭活苗免疫组鸡，在免疫初期（免疫后８ｄ）抗体效价和淋巴细胞转化率均下降（Ｐ〈０．０５），以后逐渐上升，与对照组间无明业差异；而Ｎ－７９弱毒苗免疫鸡在整个试验期抗体效 相似文献
11.
Shrestha Sulochana Dhawan Mamta Donadeu Meritxell Dungu Baptiste 《Tropical animal health and production》2017,49(2):439-444
The efficacy of vaccination with Newcastle disease (ND) La Sota and R2B (Mukteswar) modified live strain vaccines was determined by experimental challenge and with ND La Sota vaccine under field conditions in Nepal. Booster vaccination with ND La Sota vaccine after a primary vaccination with ND La Sota vaccine, induced a geometric mean titre (GMT) of 5.0 log2 haemagglutination inhibition (HI) units, compared to a GMT of 6.0 log2 HI units following booster vaccination with R2B vaccine 1 month after primary vaccination with ND La Sota vaccine. Both vaccines provided 100% protection against challenge with a local field ND strain. Furthermore, booster vaccination with ND La Sota vaccine induced protective levels of antibody after field use in villages in Jhapa, and no outbreaks of ND occurred during the study period. The ND La Sota modified live vaccine is immunogenic and efficacious and is a suitable vaccine for use in vaccination programmes in village chickens in the rural areas of Nepal.
相似文献12.
Vaccination of day-old broiler chicks against Newcastle disease and infectious bursal disease using commercial live and/or inactivated vaccines 总被引：2，自引：0，他引：2
Day-old broilers were administered live and/or inactivated vaccines to assess vaccine efficacy against challenge with Newcastle disease (ND) and infectious bursal disease (IBD). Chicks were from commercial breeder pullets vaccinated against ND and IBD using several live vaccine primers followed by an inactivated ND-IBD vaccine at 18 weeks. The most efficacious initial ND-IBD vaccination program was live ND virus by eye drop and live IBD vaccine injected subcutaneously (SQ) followed 2 hours later with inactivated ND-IBD vaccine SQ. The next two most efficacious programs were live vaccine alone and the inactivated vaccine only. Inactivated vaccine given SQ had no adverse effect on live IBD vaccine given 2 hours earlier in a similar site. Administration of inactivated vaccine by vent was not as efficacious as administration SQ. A booster of a second live ND-IBD vaccine drinking water at 18 days significantly increased levels of circulating antibody, regardless of the initial vaccination program. 相似文献
13.
对应用当地分离病毒株研制的鸡产蛋下降综合症系列油乳剂灭活苗进行了免疫试验。结果表明,免疫后,鸡产蛋下降综合症（ＥＤＳ７６）油乳剂灭活苗、鸡新城疫（ＮＤ）－产蛋下降综合症二联油乳剂灭活苗及鸡新城疫－鸡传染性支气管炎（ＩＢ）－产蛋下降综合症三联油乳剂灭活苗免疫组的血清ＥＤＳ７６ＨＩ抗体迅速上升,维持４个月后仍在６．８－８（ｌｏｇ２）以上,并且能够抵抗强毒的攻击。证明所研制的ＥＤＳ７６油苗、ＮＤ－ＥＤＳ７６二联油苗、ＮＤ－ＩＢ－ＥＤＳ７６三联油苗对ＥＤＳ７６具有良好的免疫作用,能够抵抗ＥＤＳ７６强毒的攻击并产生高而持久的血清ＨＩ抗体。此外,对ＮＤ－ＥＤＳ７６二联苗、ＮＤ－ＩＢ－ＥＤＳ７６三联苗免疫组的血清ＮＤＨＩ抗体测定结果表明,上述二联苗、三联苗能产生与接种ＮＤ油苗一样良好的ＮＤ免疫效果,在免疫后１３０天时,其血清ＨＩ抗体仍高达９－１１（ｌｏｇ２）以上,与对照组有极显著的差异 相似文献
14.
Illango J Olaho-Mukani W Mukiibi-Muka G Abila PP Etoori A 《Tropical animal health and production》2005,37(1):25-31
A locally-produced Newcastle disease (ND) I-2 thermostable vaccine of embryo-infective dose (EID50) 10(8.5) per ml was administered to 100 laboratory chickens in four test groups, each of 25 birds. It was given by the eye-drop method, in drinking water, in drinking water freshly medicated with levamisole, or using millet grains as a vaccine carrier. A fifth control group consisting of 25 birds received the heat-sensitive La Sota vaccine (EID50 10(9) per ml) by the eye-drop method. The immunological responses were monitored by the enzyme-linked immunosorbent assay (ELISA) ND antibody technique using serum samples collected from 18 birds in each group at 3-week intervals for 3 months. The overall mean ND antibody log(10) titres and percentage positivities were 3.1, 88%; 2.9, 70%; 3.0, 83%; 3.2, 87% and 3.3, 87%, respectively. The use of water alone or medicated with levamisole for vaccine administration produced significantly lower ND antibody titres only in the first 3 weeks. The immunogenicity shown by the I-2 vaccine as a potential vaccine is discussed in relation to free-range poultry management conditions in Uganda. 相似文献
15.
Bivalent Newcastle disease (ND)/infectious bursal disease (IBD) and trivalent ND/IBD/infectious bronchitis (IB) inactivated oil emulsion vaccines were prepared in the laboratory and evaluated under field conditions. Broiler breeder parent chickens previously vaccinated with live vaccines were inoculated with commercial monovalent ND and experimental bivalent or trivalent oil emulsion vaccines. The commercial vaccine induced a higher initial ND haemagglutination inhibition (HI) response than the experimental vaccines but, by 34 weeks after vaccination, the mean ND HI levels were not significantly different in any of the three flocks. All three vaccines provided sufficient ND immunity to protect against the clinical disease and egg production losses. The IBD responses of both flocks vaccinated with oil emulsion vaccine were similar to each other and only slightly lower than those flocks vaccinated with monovalent IBD oil emulsion vaccine in earlier experiments. Six weeks after vaccination, sufficient immunity was transferred to protect all the progeny against IBD challenge up to 33 days of age and some of them up to 45 days of age. Thirty-four weeks after vaccination of the parents with oil emulsion vaccine, the progeny were totally immune up to 27 days of age and some of them were immune until 37 days. Application of oil emulsion vaccines in bivalent or trivalent form did not impair the responses of the chickens to the monovalent components. 相似文献
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17.
Oligodeoxynucleotides containing unmethylated CpG motifs (CpG ODN) have been proven to be immunoprotective in mouse models. However, little work has been conducted on in vivo immune responses in chicken with CpG ODN. The objective of this study was to investigate the immunoadjuvant effects of CpG ODN to Newcastle disease (ND) vaccine and its protective effects against ND virus in SPF chicken. In this report, the titre of serum IgG to ND vaccine and the proliferation of lymphocytes were monitored in SPF chickens. The results demonstrated that the above-mentioned immune responses were significantly stronger in chickens that received CpG ODN than in the birds that received only ND vaccine. Furthermore, ND vaccine plus CpG ODN protected SPF chicken from challenge with an otherwise lethal dose of ND virus. These data suggest that CpG ODN holds considerable promise as an adjuvant for future vaccines against ND virus. 相似文献
18.
新城疫疫苗预防鸭副粘病毒病效果 总被引：1，自引：0，他引：1
为探讨新城疫疫苗对鸭副粘病毒病的预防效果,应用鸡新城疫活疫苗(I系和Lasota株)免疫2日龄雏番鸭,分别于免疫后7 d攻毒,并采血测定HI抗体。结果显示鸡新城疫I系活疫苗和Lasota疫苗对番鸭均安全,单独或混合应用均能有效抵抗鸭副粘病毒和新城疫标准毒(F48E8)的攻击;同时番鸭免疫后7 d I系疫苗诱导的HI抗体水平显明高于Lasota疫苗,而攻毒后35 d的HI抗体水平则以Lasota疫苗组高于I系疫苗组。上述结果表明新城疫I系和Lasota疫苗均可用于预防鸭副粘病毒病。 相似文献
19.
Knowledge of the dose-response relation of inactivated vaccines and of the factors that influence this relation is essential for the evaluation of existing vaccine potency assays and the development of new potency assays that are based on the antigen content of the inactivated vaccines. We quantified the relation between vaccine dose, serologic response, and clinical protection after vaccination for three different inactivated Newcastle disease (ND) vaccines. Qualitatively, similar dose-response curves were obtained for the three vaccines when either the serologic response or the clinical protection of specific-pathogen-free (SPF) chickens was plotted against the different vaccine doses applied. However, the vaccines differed quantitatively: doses of vaccines that induced similar antibody titers or clinical protection differed 2-8-fold. In contrast with the narrow range of antibody titers induced by a full vaccine dose, a very broad range of titers was obtained after dilution of the vaccines. At least 95% of the SPF chickens with detectable antibody in the serum were protected against a challenge with virulent Herts ND virus. The relation between the dosage of two different ND vaccines and the serum antibody titers remained markedly constant between 3 and 18 wk after vaccination. Vaccination of broilers instead of layers with a dilution series of inactivated ND vaccine resulted in significantly lower antibody levels and less clinical protection against virulent challenge. In conclusion, despite quantitative differences, we found comparable dose-response relations for the three inactivated ND vaccines studied. 相似文献