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间接ELISA检测鸭疫里氏杆菌抗体的研究 总被引:13,自引:0,他引:13
本文成功地建立了一种快速,敏感,特异性强的检测鸭疫里氏杆菌1型抗体的方法--酶联免疫吸附试验(ELISA),探讨和确定了ELISA的最适条件,通过对32份阳性血清效价的测定,发现血清1:100稀释时的OD值与血清效价倒数的以2为底的对数之间存在直线相关性,相关系数为0.97,并由此建立了标准曲线和回归方程。对用不同疫苗免疫鸭的抗体消长规律测定发现,油佐剂疫苗效果最好,甲醛灭活苗两次免疫次之,甲醛灭 相似文献
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本文成功地建立了一种快速、敏感、特异性强的检测鸭疫里氏杆菌1型抗体的方法—酶联免疫吸附试验(ELISA)。探讨和确定了ELISA的最适条件。通过对32份阳性血清效价的测定,发现血清1∶100稀释时的OD值与血清效价倒数的以2为底的对数之间存在直线相关性,相关系数为0.97,并由此建立了标准曲线和回归方程。对用不同疫苗免疫鸭的抗体消长规律测定发现,油佐剂疫苗效果最好,甲醛灭活苗两次免疫次之,甲醛灭活苗一次免疫效果最差。从抗体水平角度推断,雏鸭10日龄左右用苗最好,每只鸭注射0.5ml是可行的。 相似文献
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1型鸭疫里氏杆菌OmpA蛋白间接ELISA方法的建立 总被引:1,自引:0,他引:1
为建立检测1型鸭疫里氏杆菌(R.anatipestifer)的间接ELISA方法,本研究根据已发表的R.anatipestifer外膜蛋白A(ompA)基因序列(AF104937)设计引物,扩增1型R.anatipestifer HLG1株的ompA基因,构建重组质粒pHtb-ompA,转化大肠杆菌BL21(DE3),并利用IPTG进行诱导表达。SDS-PAGE和western blot结果表明,表达蛋白约为55 ku,具有良好的抗原活性。以纯化的OmpA为包被抗原建立间接ELISA并对条件进行优化。建立的ELISA具有良好的特异性、敏感性;与HLG1株菌体裂解蛋白为抗原的间接ELISA比较,符合率为91.3%。本研究建立的ELISA方法为R.anatipestifer的流行病学调查和SPF鸭的监测提供了快速、特异的血清学诊断方法。 相似文献
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以1型鸭疫里氏杆菌(RA)全基因组保守区域ompA基因的重组表达产物为包被抗原,建立了检测RA血清抗体的间接ELISA方法。原核表达的重组ompA蛋白经纯化后作为包被物,以方阵滴定法确定抗原最佳包被浓度为1.5μg/mL,待检血清最佳稀释度为1∶100。与普通的微量凝集试验相比较,该方法灵敏度高于凝集试验约16倍~128倍。与鸭源大肠埃希菌、鸭源多杀性巴氏杆菌、鸭链球菌、鸭源呼肠病毒、鸭肝炎病毒和鸭瘟病毒感染鸭血清均无交叉反应,表明该方法特异性好。利用该方法检测了雏鸭免疫RA灭活油乳剂疫苗之后血清抗体水平。 相似文献
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鸭疫里氏杆菌(Riemerella anatipestifer,简称RA)感染,又称为鸭疫传染性浆膜炎(Infectious serostis of duck),曾命名为鸭疫巴氏杆菌病,其病变特征为纤维素性心包炎、肝周炎、气囊炎及脑膜充血、出血,主要感染1~8周龄雏鸭,2~3周龄雏鸭最易感染,死亡率差异较大。RA对各品种的鸭都有致病性,对鹅、鸡及其他水禽也具有致病性,发病率和死亡率都很高,已成 相似文献
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鸭疫里氏杆菌优势血清型变化的研究 总被引:2,自引:3,他引:2
近年来,从浙江省及其周边地区鸭场患有传染性浆膜炎的病死鸭中分离鉴定出的77株鸭疫里氏杆菌,用标准定型血清作凝集试验,鉴定出:RAⅠ型33株,RAⅡ型33株,二者共占总分离茵数的85.7%,而未定型茵11株,占14.3%。结果表明:RA的优势血清型在不同的时间出现不同的变化:1998年以前为单一的RAⅠ型:1999~2000年以RAⅠ为主,占总分离茵数的51.9%;2001年以RAⅡ型占绝对优势,占总分离菌数的89.5%;而到了2002年,未定型的菌株数增加到了33.3%。同时也证明:该地区的优势血清型为RAⅠ、Ⅱ型。 相似文献
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间接ELISA检测鸭疫里氏杆菌抗体的研究 总被引:10,自引:0,他引:10
以提取的血清1型鸭疫里氏杆菌(R.a)Jb2株的脂多糖作为包被抗原,成功地建立了一种检测1型R.a抗体的间接ELISA方法,特异性试验和重复性试验证明此方法的特异性高等重复性好,并比较了间接ELISA方法,间接血凝试验,玻片凝集试验和琼脂扩散试验对抗体检出敏感性,结果表明间接ELISA方法最敏感,人工感染后鸭第72小时即可检出血清抗体为阳性(3/4)其次是间接血凝试验,第96小时即可检出50%(2 相似文献
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Kumar G Rathore G Sengupta U Kapoor D Lakra WS 《Comparative immunology, microbiology and infectious diseases》2010,33(2):133-144
Edwardsiella tarda is an important cause for hemorrhagic septicemia in fish and gastro and extra-intestinal infections in humans. Monoclonal antibodies (MAbs) were produced against outer membrane proteins (OMPs) of E. tarda ET-7, isolated from diseased snakehead (Ophiocephalus punctatus). Two stable hybridoma clones, designated as 3F10 and 2C3 MAbs were found to be potentially specific for E. tarda by indirect enzyme linked immunosorbent assay (ELISA). These MAbs recognized major immunogenic OMP band at 44kDa in Western blotting. Both MAbs belonged to the IgG1 isotype and recognized different epitopes of OMP as seen by competitive ELISA. These MAbs strongly reacted with all 17 isolates of E. tarda used in our study by indirect ELISA and Western blotting. Interestingly, no reaction was observed with the reference strain of E. tarda (MTCC 2400). The sensitivity of 3F10 MAb to detect whole cells of E. tarda was up to a level of 1x10(4)CFU/ml in indirect ELISA. No cross-reactivity of MAbs were seen with Escherichia coli, Salmonella arizonae, Pseudomonas fluorescens, Aeromonas hydrophila, Vibrio cholerae, Flavobacterium ferrugineum and Mycobacterium tuberculosis. These MAbs could be used for specific detection of E. tarda infection in fish by immunoassays. 相似文献
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Antigenic analysis of avian Chlamydia psittaci using monoclonal antibodies to the major outer membrane protein. 总被引:1,自引:0,他引:1
A Kikuta N Furukawa T Yoshida H Fukushi T Yamaguchi K Hirai 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1991,53(3):385-389
Monoclonal antibodies to the major outer membrane protein (MOMP) of Chlamydia psittaci derived from a parrot were established for antigenic analysis of avian C. psittaci. With 17 monoclonal antibodies to MOMP, 17 reactivity patterns were identified on 112 strains of C. psittaci, C. pneumoniae and C. trachomatis, which were isolated from birds, mammals and humans in Japan, U.S.A., Canada and Taiwan, from 1938 to 1987. Immunological reactivity of budgerigar-derived strains to the monoclonal antibodies was different from that of pigeon-derived strains. Imported bird-derived strains were distinguishable from domestic bird-derived strains by the reactivity to the monoclonal antibodies. A close relationship between the subtypes and geographic origins was indicated on budgerigar-derived strains. On the contrary, various reactivity patterns were shown in pigeon-derived strains isolated in a narrow area. The monoclonal antibodies established in the present work may be useful probes for ecological study of avian C. psittaci. 相似文献
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以纯化的猪传染性胃肠炎病毒(TGEV)重组S蛋白免疫BALB/c小鼠,通过细胞融合技术,间接ELISA方法进行筛选和有限稀释法3次克隆,获得2株稳定分泌抗TGEV重组S蛋白单克隆抗体的杂交瘤细胞株,分别为C7C882和B5G8G7,其染色体平均计数均为88±10对,制备腹水抗体效价分别为1:2×105和1:104,分泌抗体亚类均为IgM型.2株杂交瘤细胞上清与猪流行性腹泻病毒(PEDV)、猪轮状病毒(PRV)、猪伪狂犬病病毒(PrV)均无交叉反应,与TGEV感染细胞经间接免疫荧光检测均呈黄绿色荧光. 相似文献
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Vaccination of ducks with recombinant outer membrane protein (OmpA) and a 41 kDa partial protein (P45N') of Riemerella anatipestifer. 总被引:9,自引:0,他引:9
Bin Huang Sumathi Subramaniam Joachim Frey Hilda Loh Hai-Meng Tan Charlene J Fernandez Jimmy Kwang Kim-Lee Chua 《Veterinary microbiology》2002,84(3):219-230
The generation of protective immunity against Riemerella anatipestifer infection in ducks were investigated by immunizations with recombinant glutathione sulfatransferase (GST) fusion's proteins of OmpA, a 42kDa major outer membrane protein, and P45N', a 41kDa N-terminal fragment of a newly identified 45kDa potential surface protein from R. anatipestifer. The DNA encoding OmpA and P45N' were isolated from R. anatipestifer serotype 15 (field strain 110/89) and serotype 19 (reference strain 30/90), respectively. Immunoblotting and ELISA results showed that the purified recombinant proteins induced the production of antibodies in immunized ducks. However, neither was protective against subsequent challenge with the virulent serotype 15 strain, 34/90. All the five ducks immunized with formalinized R. anatipestifer strain 34/90 survived the challenge with the homologous strain whereas six out of seven ducks in the non-immunized control group died within a week following the challenge. 相似文献
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SMD单克隆抗体的制备及测定方法的建立 总被引:6,自引:0,他引:6
用戊二醛作为偶联剂 ,将磺胺对甲氧嘧啶 (SMD )与牛血清白蛋白 (BSA )或卵清蛋白 (OVA)偶联形成完全抗原 ,经紫外分光光度计扫描鉴定。以人工抗原免疫BALB/c小鼠 ,取脾细胞与骨髓瘤细胞 (SP2 /0 -Ag1 4)融合 ,用间接ELISA联合竞争ELISA法筛选出产生针对SMD抗体的杂交瘤细胞。经克隆 ,得到 3株特异性好的阳性杂交瘤细胞 ,注入小鼠腹腔产生腹水。建立了测定SMD的ELISA法 ,其检测下限小于5ng/mL。 相似文献
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M C Healey H M Gharpure S J Kleinschuster H H Hwang A V Johnston 《American journal of veterinary research》1986,47(7):1446-1451
Three monoclonal antibodies (LG17, LG30, and LG33) were used to identify outer membrane antigens of Actinobacillus sp (As8C isolate) cultured from the epididymides of an infected ram lamb. Specificity of the 3 antibodies to As8C antigens was determined by use of bacterial agglutination, the enzyme-linked immunosorbent assay, and the indirect fluorescent antibody test. Results of immunoelectron microscopy confirmed that each antibody was specific for epitopes on As8C outer membrane antigens. Evaluation by use of enzyme-linked immunoelectrotransfer blot indicated that target antigens for LG17 and LG33 antibodies had molecular weights of 10 kilodaltons and 43 kilodaltons, respectively. Multiple-band staining was observed with the LG33 antibody. The target antigen for the LG30 antibody could not be discerned by use of enzyme-linked immunoelectrotransfer blot. For each of the 3 monoclonal antibodies, enzyme-linked immunosorbent assay titers were obtained for Actinobacillus seminis, A actinomycetemcomitans, and 10 field isolates of Actinobacillus spp. Target antigens for LG17 and LG30 antibodies occurred infrequently or were absent on these bacteria. However, the target antigen for the LG33 antibody was shared by Actinobacillus seminis, A actinomycetemcomitans, and the 10 field isolates of Actinobacillus spp, indicating some diversity of outer membrane antigens between isolates. 相似文献
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以纯化的PPV重组VP2蛋白免疫BALB/c小鼠,通过细胞融合技术,间接ELISA筛选和3次以上细胞克隆,获得了5株稳定分泌抗PPV VP2蛋白单克隆抗体杂交瘤细胞株,分别命名为2D5、1F11、2B4、3C8、1 H3。其染色体平均数均为87~102条,分泌抗体亚类4株为Ig M类,1株为IgG类,Western blot检测表明,5株单抗均识别猪细小病毒VP2蛋白;间接免疫荧光鉴定表明,5株单抗均与PPV全病毒发生反应;间接ELISA鉴定与其他相关病毒的交叉反应性表明,制备的5株单抗不与TEGV、PRV和PEDV反应,表明所制备的抗体与猪细小病毒具有较强的特异性反应。 相似文献