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1.
正免疫抗体效价检测,已成为现代动物疫病防控科学评价动物免疫接种效果的有效方法之一。正向间接血凝试验通常只用于O型口蹄疫抗体检测,该方法主要利用口蹄疫抗原来检测血清中是否含有口蹄疫抗体或判定抗体滴度能否达到免疫保护标准。液相阻断ELISA适用于O型、亚洲I型和A型口蹄疫抗体检测,其操作较正向间接血凝试验相对繁琐,但该方法精准性和稳定性高,既能评价口蹄疫免疫情况,又能检测口蹄疫病毒  相似文献   

2.
O型口蹄疫正向间接血凝试验是一种微量的体外免疫反应,主要利于抗原、抗体在一定条件的特异性反应形成抗原-抗体复合物,由于该复合物微小,所以采取先将抗原与红细胞结合,再让其与特异性抗体反应,使带有抗原的红细胞出现凝集现象,从而利用凝集现象进行免疫效果的判断。论述了O型口蹄疫正向间接血凝试验的操作体会。  相似文献   

3.
用于检测猪瘟抗体的免疫金标试纸条的研制与应用研究   总被引:20,自引:2,他引:18  
以猪瘟抗原包被硝酸纤维素膜的检测区,在其下端附着胶体金标记的猪瘟抗原,组成免疫金标试纸条,根据胶体金免疫层析原理,用该试纸条建立检测猪瘟抗体水平的免疫金标检测法。再用本试纸条检测法与Dot-ELISA及间接血凝法对298份猪、鸡、鸭、鹌鹑、兔、鼠、羊血清进行猪瘟抗体检测,结果符合率达100%。试验结果表明,本法与Dot-ELISA及间接血凝法一样特异、敏感和微量,而且检测时间短、直观,结果容易判定,适用于大面积猪瘟抗体监测普查。  相似文献   

4.
为了节省IHA(间接血凝试验)血凝抗原,扩大家畜O型口蹄疫免疫抗体检测数量,在不影响检测效果(合格率)的基础上,探索和改进原正向间接血凝试验检测方法。试验分别用口蹄疫O型-Asia 1型二价灭活苗和猪O型口蹄疫苗对天水地区几个养殖场的家畜进行了免疫注射,免疫后(牛免疫21 d、猪免疫28 d)随机抽样采血,常规分离血清,采用简化后的正向间接血凝试验进行牛和猪口蹄疫O型免疫抗体检测试验。结果表明:免疫合格率分别达到97.5%和92.5%;改进后的IHA既加快了操作速度、节省诊断抗原,又降低了检测成本。在家畜O型口蹄疫检测工作中具有推广应用价值。  相似文献   

5.
为更好地了解猪口蹄疫O型合成肽疫苗与猪口蹄疫O型灭活疫苗的免疫效果与合理的检测方法,浦口区兽医站在某猪场进行了此次试验。试验猪分3组,分别注射不同厂家生产的猪口蹄疫O型合成肽疫苗、猪口蹄疫O型(OZK/93株+OS/99株)灭活疫苗,并采用猪O型口蹄疫VPI抗体检测试剂盒、口蹄疫O型液相阻断ELISA抗体检测试剂盒和正向间接血凝试验(HI)分别对使用上述口蹄疫苗免疫效果进行检测。结果表明,猪注射口蹄疫O型合成肽疫苗后,用猪O型口蹄疫VPI抗体检测试剂盒检测,抗体阳性率达到100%;用正向间接血凝和液相阻断ELISA方法检测不到注射合成肽疫苗后产生的抗体效价。免疫猪口蹄疫O型(OZK/93株+OS/99株)灭活疫苗后,用VPI抗体检测试剂盒检测,抗体阳性率只有40%;用HI方法进行检测,抗体阳性率为75%;用液相阻断ELISA方法进行检测,抗体阳性率为70%。  相似文献   

6.
不同口蹄疫疫苗免疫效果及检测方法评估   总被引:2,自引:0,他引:2  
为更好地了解猪口蹄疫O型合成肽疫苗与猪口蹄疫O型灭活疫苗的免疫效果与合理的检测方法,广西农垦永新畜牧集团有限公司良圻原种猪场在某肥育场进行了此次试验。试验猪分3组,分别注射不同厂家生产的猪口蹄疫O型合成肽疫苗和猪口蹄疫O型OS/99株灭活疫苗,并采用猪O型口蹄疫VP1抗体检测试剂盒和正向间接血凝试验(HI)分别对使用上述口蹄疫疫苗免疫效果进行检测。结果表明,猪注射口蹄疫O型合成肽疫苗后,用猪0型口蹄疫VP1抗体检测试剂盒检测,抗体阳性率达到100%;用正向间接血凝试验方法检测不到注射合成肽疫苗后产生的抗体效价。免疫猪口蹄疫O型OS/99株灭活疫苗后,用VP1抗体检测试剂盒检测,抗体阳性率只有30%;用HI方法进行检测,抗体阳性率为60%。  相似文献   

7.
O型口蹄疫病毒免疫层析试纸条检测方法的建立   总被引:3,自引:2,他引:1  
为建立一种快速、准确检测O型口蹄疫病毒(FMDV)抗原的胶体金免疫层析方法,将兔、豚鼠抗O型FM-DV多抗用DEAE-Sephose层析柱纯化。胶体金标记O型豚鼠口蹄疫抗体,形成金标探针并将其喷涂于玻璃纤维上。兔抗O型FMDV抗体和羊抗豚鼠IgG分别标记于硝酸纤维素膜上作为检测带和质控带,各部件按顺序装配形成快速诊断试纸条。如果待检样品中含有O型FMDV,它将与玻璃纤维上的胶体金探针和兔抗O型FMDV抗体形成夹心复合物,并在检测带被固定,沉集反应形成肉眼可见的红色条带。在田间试验中,53份试验样本分别用试纸条和反向间接血凝试验进行检测,2种方法的阳性率分别为95.45%和90.91%。评价试验证实,本研究建立的胶体金免疫层析方法简便、快速,具有良好的特异性和敏感性,非常适于基层兽医实验室诊断时使用。  相似文献   

8.
猪口蹄疫O型合成肽疫苗免疫效果试验   总被引:3,自引:0,他引:3  
为了更好地了解猪口蹄疫O型合成肽疫苗与灭活疫苗免疫后抗体水平之间的差异.在梅小市选择2个规模化养猪场,每个猪场分2组,对试验猪分别免疫猪口蹄疫O型合成肽疫苗和猪口蹄疫O型灭活疫苗.对接种疫苗的试验猪进行免疫应激观察,结果显示:注射合成肽疫苗试验猪未出现不良免疫副反应.说明用合成肽疫苗临床使用的安全性较高;采用猪O型口蹄疫VP1抗体检测试剂盒和正向间接血凝试验分别对使用上述两种口蹄疫疫苗免疫21d后的猪血清进行检测,结果表明:免疫猪口蹄疫O型合成肽疫苗用猪O型口蹄疫VP1抗体检测试剂盒检测.抗体阳性合格率达到92.50%,免疫猪口蹄疫O型灭活疫苗用正向间接血凝试验检测,免疫合格率为35.83%,说明猪口蹄疫O型合成肽疫苗接种后的免疫效果明显优于传统灭活疫苗。  相似文献   

9.
正向间接血凝试验(IHA)是监测口蹄疫流行和免疫抗体水平的一种简单、快速、准确、经济的检测方法.正向间接血凝为一种微量的定量反应试验,当待检血清中抗体浓度过高,易造成前带现象[1-2],影响判定结果.2008年我州用IHA方法检测O型口蹄疫抗体效价试验中,达日县10份牦牛血清,试验结果均发生前带现象.  相似文献   

10.
本试验旨在迅速、准确检测口蹄疫阴性血清和阳性血清,确立O型口蹄疫抗体金标检测试纸条的判定标准。通过3批次O型口蹄疫抗体金标检测试纸条,对180份猪、牛、羊口蹄疫阴性血清,197份猪、牛O型口蹄疫弱阳性血清,317份猪、牛、羊O型口蹄疫阳性血清,223份牛Asia 1、A型口蹄疫阳性血清,600份田间血清样品进行检测,同时用O型口蹄疫液相阻断ELISA和O型口蹄疫正向间接血凝2种方法检测相同的血清样品。对3种方法检测的结果进行分析,并且将试纸条的检测线和质控线的显色情况与O型口蹄疫液相阻断ELISA的抗体滴度相比较。确立了试纸条的诊断标准:试纸条抗体滴度1∶2-为口蹄疫抗体阴性;试纸条抗体滴度1∶8+为O型口蹄疫阳性血清。根据试纸条的显色结果与液相阻断ELISA的结果的关系,绘制了比色卡。试纸条的判定标准检测血清结果与液相阻断ELISA和正向间接血凝结果分别进行统计学分析,试纸条与液相阻断ELISA和正向间接血凝相关性分别为y=1.142x+0.7421,y=1.1845x+0.8623;相关系数(r)分别为0.9221和0.9033。结果显示,O型口蹄疫抗体金标检测试纸条的判定标准的确立和比色卡的绘制,实现半定量分析,更加迅速、准确,适于实验室、基层兽医站和养殖场使用。  相似文献   

11.
母源抗体对猪口蹄疫疫苗免疫应答的影响   总被引:2,自引:0,他引:2  
用液相阻断ELISA(Liquid phase blocking ELISA,LPB-ELISA)和正向间接血凝(Indirect hemagglutination test,IHAT)2种血清学试验方法对规模化饲养猪群仔猪的口蹄疫母源抗体、母源抗体的传递途径、消长规律、母/仔代特异抗体相关性及母源抗体对口蹄疫疫苗免疫的影响进行了研究和分析。结果表明,2种血清学方法均没有从未吸吮初乳的新生仔猪中检出特异抗体;在吸吮初乳后的仔猪血清中可检出特异性抗体,并于10日龄左右抗体效价升至峰值,而后随着日龄的增加,特异性抗体的效价呈明显的线性下降,母源抗体半衰期约为10~20d,至45~60日龄母源抗体效价降至不完全保护带(lgX<1.8)或更低;仔猪母源抗体水平与母体特异抗体水平呈正相关。通过对不同日龄仔猪接种口蹄疫疫苗后抗体水平检测发现,仔猪体内较高水平的母源抗体对疫苗免疫应答具有明显或一定的负面影响。  相似文献   

12.
使用牛用口蹄疫AsiaI-O型双价灭活苗与猪用口蹄疫O型灭活苗分别接种50d商品猪和怀孕90d种猪,免疫前和免疫后的3w及7w进行抗体水平检测。O型口蹄疫采用正向间接血凝试验、AsiaI型口蹄疫采用液相阻断ELISA检测。同时对接种猪进行免疫应激观察。结果显示:猪使用牛用口蹄疫AsiaI—O型双价灭活苗3w后口蹄疫AsiaI的抗体水平十分低,最高只有5%,口蹄疫O型抗体合格率在35%以上;而注射猪用口蹄疫O型灭活苗的O型抗体水平合格率只有35%。而牛用口蹄疫AsiaI-O型双价灭活苗两次接种后,AsiaI和O型抗体水平均达到大于70%的要求。  相似文献   

13.
An indirect hemagglutination was developed for the diagnosis of equine infectious anemia using sheep red blood cells coated with group specific virus antigen which had been highly purified by affinity chromatography. The presence of indirect hemagglutination antibodies was demonstrated in horses with equine infectious anemia since the cells were specifically agglutinated by all the serum samples obtained from experimentally infected horses. Antibodies appeared within 35 days after inoculation, and development of which coincided well with that of precipitating and complement fixing antibodies. Titer of indirect hemagglutination antibodies were ten to 320 times greater than those of precipitating antibodies. Test results could be read more clearly by the indirect hemagglutination test especially in weakly positive cases. Ninety-six samples from suspected field cases collected from every region of Japan which were positive on the immunodiffusion test were also positive on indirect hemagglutination test. Serum samples from 420 horses in one race track were examined by both the indirect hemagglutination and immunodiffusion tests to determine the reliability of the indirect hemagglutination test for diagnosis of equine infectious anemia. The same result was obtained on both tests. Based on this evidence, the indirect hemagglutination test can be employed as a very sensitive serological test for the diagnosis of equine infectious anemia.  相似文献   

14.
试验采用口蹄疫O型间接血凝试验和O型口蹄疫抗体液相阻断ELISA 2种试验方法检测了60份血清中猪O型口蹄疫免疫抗体.研究结果显示,60份被检血清口蹄疫O型间接血凝试验检测合格率为93.3%,O型口蹄疫抗体液相阻断ELISA试验检测的合格率为73.3%,口蹄疫O型间接血凝试验检测合格率明显高于O型口蹄疫抗体液相阻断ELISA试验检测的合格率(相差20个百分点);2种方法的总符合率为66.7%、<25(<2^6)的符合率为28.6%,≥2^5(≥2^6)的符合率为82.1%.2种方法检测出的整体免疫效果较好,平均合格率远高于农业部规定的70%.  相似文献   

15.
The study was aimed to use colloidal gold immune chromatography technology to establish a rapid method for detection of canine serum canine parvovirus (CPV) hemagglutination inhibition (HI) titer and CPV vaccine immunization effect assessment.Double antibody sandwich method and monoclonal antibodies of anti-CPV hemagglutination antigen were used to prepare CPV antigen test strip.Canine serum with different proportion respectively was mixed with quantitative CPV antigen for full reaction,then dropped the mixture into the CPV colloidal gold test strip,so according to the highest serum dilution ratios when the test strip line T (line T) vanishes,it was to judge CPV antibodies in serum of the HI titer.This method had been used to detect 86 canine serum samples,at the same time,analyzing and comparing it with traditional hemagglutination inhibition test method.The results showed that the CPV antigen detection test strip was successfully prepared,and the reaction conditions and results of the test strip for detecting the titer of CPV-HI in canine serum were determined.The results indicated that when detecting CPV antigen after the dilution of different ratios of canine serum,the highest serum dilution ratios when the strip line T vanished and the HI titer had positive correlation.The highest dilution ratios of canine serum multiplied by 4 was the HI titer.The results of two methods had 90.7% consistency.This experiment established the colloidal gold immune chromatography test strip for the detection of CPV-HI titers method initially.This CPV-HI detection provided a simple and fast test method for the effect evaluation of CPV vaccine immune.  相似文献   

16.
Caesarean-derived, colostrum-deprived swine were exposed to a broth culture of a low passage field isolate of Mycoplasma hyopneumoniae by intranasal inoculation. The intranasal-inoculated swine subsequently were commingled with their litter-mates to effect transmission via contact-exposure. Sera were collected from the swine at two to four week intervals for approximately one year postexposure and evaluated by the enzyme-linked immunosorbent assay (ELISA), indirect hemagglutination and complement fixation tests. The intranasal-exposed swine seroconverted earlier, developed higher titers and remained indirect hemagglutination and complement fixation positive longer than the contact-exposed swine. It was concluded that the antibody response of intranasal-exposed swine was artificially high and that sera from such swine were not suitable for evaluating the sensitivity of mycoplasmal pneumonia of swine serodiagnostic tests. The indirect hemagglutination test was relatively insensitive and technically cumbersome and the least promising as a practical field test. The complement fixation test appeared to be slightly more sensitive in detecting early antibody production (especially in contact-exposed swine) but it was the least sensitive in detecting late antibodies. The ELISA was generally the most sensitive procedure. Individual high ELISA titers were from ten to 32 times greater than maximum complement fixation and indirect hemagglutination titers. The most striking difference among the three tests was the persistence of high ELISA titers late in the study. All swine were ELISA positive at necropsy approximately one year postexposure despite the fact that lungs were devoid of lesions and culturally and immunofluorescent negative for M. hyopneumoniae.  相似文献   

17.
本试验用分离纯化的猪胸膜肺炎放线杆菌(APP)3型荚膜多糖(CPS),致敏双醛化处理的绵羊血红细胞,建立了APP的血清学诊断方法,结果表明,该方法特异性强,仅与APP 3型阳性血清反应,可以用其进行APP疫苗免疫后抗体检测,该诊断方法简单、快速,适用于临床疾病的诊断。  相似文献   

18.
Fetal fluids from field cases of fetal death were assayed for antibody to porcine parvovirus (PPV) using 3 different techniques. An indirect immunofluorescent antibody test, a counter immunoelectrophoresis test and a hemagglutination inhibition test were compared. The indirect immunofluorescent antibody test was found to be the most sensitive of the tests employed. The hemagglutination inhibition test apparently suffered from the occurrence of false positive results.  相似文献   

19.
Sera from horses with respiratory disease (RD) have been investigated using the complement fixation test, indirect hemagglutination test, enzyme immune assay, and the metabolic inhibition test, and sera from mares after abortion, using the complement fixation test, indirect hemagglutination test and enzyme immune assay, for antibodies against Mycoplasma equirhinis, M. subdolum, M. equigenitalium, M. pulmonis, M. felis, Acholeplasma laidlawii, A. hippikon and A. equifetale. Antibodies were found against all mycoplasma and acholeplasma species tested, more often against acholeplasmas. The antibody pattern was quite similar for horses with RD and for mares after abortion. The results of the four serological tests performed showed only a limited correlation and the percentage of sera with antibodies detected by the four tests used differed widely.  相似文献   

20.
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