鸡球虫三价弱毒疫苗对鸡的免疫效果研究     

《中国兽医科技》2007,37(10):873-875

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缓释复方免疫增强剂对鸡新城疫疫苗免疫增强效果研究     

刘瑞生  薛掌林  张述斌  王必慧 《水禽世界》2007,(12):8-10

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。  相似文献   

肉鹅H5亚型禽流感疫苗免疫效果的研究   总被引：2，自引：0，他引：2  

张济培  陈建红  陈响坤  卢玉葵  司兴奎  吴悦霞 《中国畜牧兽医》2006,33(12):94-97

选用H 5亚型禽流感油乳剂灭活疫苗(H 5N 1,R e1株)对马岗鹅作首免日龄、免疫次数与免疫剂量的免疫试验。结果表明,雏鹅在7、14或21日龄作1次免疫均产生免疫应答,其中14与21日龄免疫组免疫后第5周抗体水平均达4 log2以上,抗体动态变化均值与峰值均高于7日龄免疫组2~3个滴度。用0.5、1和2 m l/只3个剂量对14日龄雏鹅的免疫试验中,0.5m l组抗体水平上升过程缓慢,免疫后4周抗体水平才达4 log2以上,1与2 m l组在免疫1周后上升速度较快,免疫后2周即达4 log2以上,抗体水平相近,但2 m l免疫组免疫后5~7周抗体水平均低于1 m l免疫组。说明接种剂量为1或2 m lH 5N 1油苗比接种0.5 m l的免疫效果好,尤以1 m l免疫剂量效果最好。雏鹅在7、14日龄或14、21日龄作2次免疫和7、14、21日龄作3次免疫,首免后抗体上升速度快,各检测点抗体水平均值相近,均在首免后3周达到4 log2以上,4~5周达6 log2以上,4~7周的抗体水平均高于14日龄1次免疫组,且提前2周达到4 log2以上,说明2次、3次免疫组的抗体水平高于1次免疫组,而2次与3次免疫组的抗体水平无明显差异。以上结果说明,在肉鹅生产的禽流感免疫中,选择以14日龄首免0.5 m l/只,21日龄2免接种1 m l/只可取得较为理想的免疫效果。  相似文献   

松科植物提取物对肉仔鸡免疫功能影响的研究     

王占彬  李宏伟  郭鲜敏  杨红敏 《中国饲料》2006,(8):34-36

从豫西山区野生针叶松树皮中提取生物活性物质,研究其对肉仔鸡免疫功能的影响。选取180只1日龄Avian肉仔鸡随机分为4组,每组3个重复,每个重复15只。A组为对照组,饲喂基础日粮,B、C、D组分别添加500、1000、4000mg/kg松科植物提取物。在21、49日龄时分别测定免疫器官重量,49日龄时测定淋巴细胞转化率及平均日增重。结果表明,日粮中添加松科植物提取物,可以显著提高免疫器官重量和淋巴细胞转化率(P<0.05)。  相似文献   

二氢杨梅素对肉仔鸡生长性能、免疫器官指数及血液生化指标的影响   总被引：2，自引：0，他引：2  

韩爱云  黄仁录  张国强  谢鹏  冯京海  张敏红 《中国饲料》2006,(10):20-22

1日龄AA肉公雏300只,随机分为5个组,每组6个重复,每个重复10只鸡。试验Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ组在基础日粮中分别添加0%、0.025%、0.05%、0.1%和0.25%的二氢杨梅素(DMY),研究DMY对肉仔鸡生长性能、免疫器官指数及血液常规理化指标等影响。结果表明:1)日粮中添加不同剂量的DMY对肉仔鸡日增重有提高的趋势,0.05%的DMY显著提高肉仔鸡饲料转化率(P<0.01);试验期间,各组试验鸡生长发育正常,各组织器官未见异常。2)0.05%DMY显著提高21d肉仔鸡法氏囊指数(P<0.05);3)0.25%DMY组显著降低21d肉仔鸡血清总蛋白、白蛋白含量,对球蛋白无显著影响;4)0.025%、0.05%DMY显著降低21d肉鸡血清谷丙转氨酶(GPT)活性(P<0.05,P<0.01),0.025%～0.1%剂量的DMY能显著降低42d肉鸡血清GOT活性(P<0.05);5)各剂量的DMY对21、42d肉鸡血清谷草转氨酶(GOT)无显著影响。  相似文献   

中草药和芦荟多糖对肉仔鸡肠道微生态、免疫功能及生产性能的影响   总被引：2，自引：1，他引：2  

戴必胜  蒋林  陈少雄 《中国家禽》2007,29(16):21-24

研究了中草药添加剂、芦荟多糖对肉仔鸡肠道主要菌群、小肠微绒毛密度、免疫功能及生产性能的影响.结果表明,肉仔鸡饲粮中添加中草药、芦荟多糖,能显著降低盲肠内容物大肠杆菌浓度,提高盲肠内双歧杆菌和乳酸菌杆菌浓度(P＜0.05);回肠微绒毛高度增加、密度加大(P＜0.05);免疫器官胸腺、脾脏、法氏囊相对质量均显著增加,新城疫抗体效价显著提高(P＜0.05);添加中草药、中草药 芦荟多糖显著提高了肉仔鸡的日增重和降低了料肉比(P＜0.05).  相似文献   

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

XIONG Xiaoyan  QIN Zhenbin  MO Hongfang  HE Dongxian  YU Lintian  XU Jiarong 《中国畜牧兽医》2007,47(12):4032-4040

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.  相似文献   

Monitoring the Immune Status of Broilers Against Reoviruses Using Challenge and Serologic Data     

《The Journal of Applied Poultry Research》2007,16(2):187-191

Reoviruses are an important cause of suboptimum performance in commercial broilers worldwide. Integrators use the enzyme-linked immunosorbent assay against the S1133 antigen for monitoring serum of breeders for indicating pullet vaccine success. However, without correlating serology to reovirus challenge, it is difficult to determine whether titers reflect protective immunity. We developed a broiler challenge test against 2 common reovirus isolates (2408 and S1133) to evaluate the efficacy of reovirus pullet vaccine programs. Two reovirus serologic and challenge studies were undertaken using chicks from broiler integrators from the southeastern United States. Breeder flocks, from which the chicks were obtained, received at least 1 live and 2 inactivated reovirus vaccines during their pullet phase. One-day-old progeny were collected from 6 breeder flocks. At 1 d of age, 20 chicks from each broiler flock were bled, and serum was analyzed for antibodies. At 3 to 4 d of age, 20 progeny per flock were challenged with the 2408 reovirus by intratracheal route. At 10 to 14 d of age, another 20 birds per flock were challenged with the S1133 reovirus by footpad. Twenty birds per flock were used as nonchallenged controls. At 3 wk of age, all birds were killed and weighed. Percentage of protection was calculated for each flock based on the absence of gross lesions. Flocks with at least 50% protection were considered well protected. Most flocks were well protected against both viruses. The percentage of protection correlated with day-old enzyme-linked immunosorbent assay titers. Chicks from younger hens had higher titers and the best protection against challenge. Producers, whose hen flocks were monitored herein, were doing a good job of immunizing pullets against reovirus. They are now using reovirus progeny challenge studies along with breeder antibody titers to determine vaccination success of their pullets.  相似文献   

铬对肉仔鸡生长性能、免疫功能和胴体品质的影响   总被引：5，自引：2，他引：5  

张庆东  罗绪刚  王永军  吕林  刘彬 《中国畜牧杂志》2006,42(9):19-21

用21日龄Arbor Acress(AA)肉公鸡336只,研究饲粮中添加铬对肉仔鸡生长性能、免疫功能和胴体品质的影响。将试验鸡只共分为8个处理组,分别添加源于氯化铬的铬2．0、4．0、6．0、8.0、10．0、12．0和14．0mg/kg。结果表明:饲粮中添加2．0mg/kg铬显著提高了肉仔鸡胸腺重(P<0．10),降低了腹脂率(P<0．10),4．0、6．0mg/kg铬显著提高了全净膛率(P< 0．10),各试验组显著提高了T淋巴细胞转化率(P<0．10);饲粮中添加铬对其余指标则无显著影响(P>0．10)。  相似文献   

白术及白术多糖对SD大鼠生长性能和免疫功能的影响   总被引：20，自引：0，他引：20  

胡晓蕾  胡迎利  汪以真 《中国兽药杂志》2006,40(1):2-6

在SD大鼠基础日粮中添加不同浓度的白术及其多糖，研究其对SD大鼠生长性能和免疫功能的影响。结果表明，一定剂量白术及其多糖均能有效提高SD大鼠生长性能，并能增加SD大鼠外周血白细胞的含量、NBT阳性率和血清溶菌酶含量，提高血清免疫球蛋白和补体水平，促进外周血、脾脏T／B淋巴细胞转化率，增强机体免疫功能。  相似文献