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1.
作者对血清学不同的禽腺病毒（ＦＡＶ）感染的绒毛尿囊膜（ＣＡＭ）和鸡肾细胞培养物（ＣＫＣ）制备的琼脂凝胶沉淀反应抗原进行了比较。结果表明这两种类型的抗原对异源抗血清的灵敏度比对同源抗血清的灵敏度低，在血清型之间存在定量的差异。ＣＡＭ抗原对异源抗血清的灵敏度比ＣＫＣ抗原对异源血清的灵敏度高。含２或３种病毒株抗原的多价ＣＡＭ抗原在检测田间血清样品时可提高其灵敏度，从而使检出率提高。 相似文献
2.
用曼氏血吸虫抗原特异性的保护性单抗Ｄ６多次免疫新西兰大白兔，从１只免疫兔分离得到的免疫血清在ＥＬＩＳＡ试验中对单抗Ｄ６的反应，比对血吸虫的其它两株同亚型抗原特异性单抗Ｎ（１２２）和Ｎ（３４）的反应强，能强烈地抑制单抗Ｄ６识别曼氏血吸虫尾蚴抗原（ＣＡＰ）和虫卵抗原（ＳＥＡ），而不能抑制单抗Ｎ（１２２）和Ｎ（３４）识别ＣＡＰ和ＳＥＡ。多次实验的结果还证明，单抗Ｄ６免疫兔血清不能识别ＣＡＰ和ＳＥＡ，正常兔血清不能抑制单抗Ｄ６识别ＣＡＰ和ＳＥＡ。单抗Ｄ６免疫兔血清经饱和硫酸铵和结合有正常小鼠血清蛋白的免疫亲和层析柱纯化后，其免疫原性不变。这些结果说明，免疫兔血清中含有抗保护性单抗Ｄ６的抗独特型抗体。日后可用它免疫动物，探索抗独特型抗体疫苗在血吸虫病免疫预防上的应用价值。 相似文献
3.
用多头绦虫原头节，囊壁，囊液层析纯化抗原及原头节排泄分泌（ＥＳ）抗原对绵羊免疫及攻击感染多头涤虫虫卵后的血清进行ＥＬＩＳＡ检测，观察了血清抗体的消长规律，结果表明，绵羊在感染虫卵后第１周即可检测出血清抗体，感染后３～５周抗体效价达峰值，一直持续到试验结束，免疫组绵羊在免疫３次后，血清抗体效价迅速升高，第３次免疫后１～２周达到峰值，且抗体水平明显高于虫卵感染组，在攻击虫卵后抗体效价开始下降，但直到试 相似文献
4.
异源抗原在建立ELISA检测传染性法氏囊病毒抗体中的应用 总被引：4，自引：0，他引：4
本文报告采用ｖｅｒｏ细胞增殖的ＩＢＤＶ抗原建立了间接酶联免疫吸附试验（ＥＬＩＳＡ），用于定量检测鸡传染性法氏囊病毒（ＩＢＤＶ）抗体。该法快速、敏感性高、特异性强、重复性好。同时，通过３０份血清样品ＥＬＩＳＡ效价（ＥＴ）的对数值（ｌｏｇＥＴ）与血清Ｐ／Ｎ值（待检血清ＯＤ值与阴性血清ＯＤ值之比）的线性回归分析，得直线方程ｙ＝３．０５８９＋０．０７３９ｘ（ｒ＝０．９１７４），从而血清样品的ＥＴ可通过血清单一稀释度的Ｐ／Ｎ值来计算。用不同来源抗原作ＥＬＩＳＡ表明，从ｖｅｒｏ细胞增殖的抗原比从鸡胚成纤维（ＣＥＦ）细胞增殖的抗原可提高检测血清ＯＤ值近２０％，表现出异源抗原具有更高的特异性 相似文献
5.
利用ＴｒｉｔｏｎＸ－１００助溶，由猪生殖－－呼吸道综合征病毒（ＰＲＲＳＶ）感染的ＭＡＲＣ－１４５细胞可制备出高纯度的ＥＬＩＳＡ抗原。这一技术消除了涉及到ＰＲＲＳＶ抗的及细胞抗在的常见本底反应。将这种高质量抗原应用到检测抗ＰＲＲＳＶ抗体的间接ＥＬＩＳＡ中，辅以一咱有效的血清封闭稀释剂可消除血清样品的非特异性反应。这种ＥＬＩＳＡ技术比间接免疫荧光试验（ＩＦＡ）更为敏感；特别是对感染后期血清有高度特异性 相似文献
6.
本实验应用体外培养方法制备细粒棘球绦虫六钩蚴排泄分泌（ＥＳ）抗原，应用酶联兔疫吸附试验（ＥＬＩＳＡ）首次对六钩蚴ＥＳ抗原的反庆原性进行了初步分析。以５μｇ／ｍｌ包被反应板分别与已知阳性，阴性血清；人工感染血清；免疫血清；疫区屠宰绵羊血清；肝片吸虫，细颈囊尾蚴以及边虫感染的绵羊添反应，结果表明六钩蚴ＥＳ抗原具有较好的反庆原性。ＳｅｐｈａｄｅｘＧ－２００层析以抗原有一定的纯化作用。纯化六钩蚴ＥＳ抗原可 相似文献
7.
本文对６种住肉孢子虫包裹要溶性蛋白的抗原特性进行了研究。应用ＳＤ－ＳＡＧＥ分别从包裹提取物中分离出２３～３３条蛋白区带,分子量为１４．５～１００ＫＤ。以梭形住肉孢子虫包裹抗原免疫兔血清和黄牛,水牛,绵羊,山羊和猪住肉孢子虫阳性血清对梭形柱肉孢子虫和巨型住肉孢子虫分离蛋白作免疫印迹试验（Ｗｅｓｔｅｒｎｂｌｏｔｔｉｎｇ）显示１００ＫＤ和９０ＫＤ蛋白带可被同源和异源动物血清所识别,此外,梭形住肉孢子虫包 相似文献
8.
应用本瓜蛋白酶消化法，从马立克氏病病毒（ＭＤＶ）人工感染鸡的淋巴细胞瘤表面提取马立克氏病相关肿瘤表面抗原（ＭＡＴＳＡ）。所获得的抗原与从肿瘤细胞表面洗脱的抗ＭＡＴＳＡ抗体在ＥＬＩＳＡ中呈阳性反应。将这种抗原与白油佐剂乳化，给２０日龄鸡肌注免疫３次，应用间接ＥＬＩＳＡ对被免疫鸡的ＭＡＴＳＡ抗体进行了监测。结果表明，免疫前正常鸡的血清中无ＭＡＴＳＡ抗体存在，而用这种抗原免疫后１０天即可形成抗体应答，Ｅ 相似文献
9.
在间接酶联免疫吸附试验（ｉＥＬＩＳＡ）中，用牛种氏菌自然感染血清与布氏菌１９号苗免疫血清同时滴定强毒牛种布氏菌酶解抗原（ＰＫ抗原），选取最佳鉴别诊断抗原浓度建立了牛种布氏菌自然感染与１９号苗免疫血清学鉴别诊断方法，用该方法与常规抗原浓度ｉＥＬＩＳＡ补体结合试验（ＣＦＴ），试管凝集反应（ＳＡＴ）对６０份采自６头１９号苗免疫不同时期血清，１７５头份分离出牛种布氏菌牛血清进行了比较试验，证实本研究建立的 相似文献
10.
用昆虫杆状病毒表达系统获得的马传染性贫血病病毒（ Ｅ Ｉ Ａ Ｖ） 核心蛋白（ Ｇａｇ） 和 Ｐ２６ 蛋白, 作为免疫琼脂双扩散（ Ａ Ｇ Ｉ Ｄ） 和酶联免疫吸附试验（ Ｅ Ｌ Ｉ Ｓ Ａ） 抗原。对７６ 份已知马传贫非特异性血清进行检查, 同时与市售 Ａ Ｇ Ｉ Ｄ 和 Ｅ Ｌ Ｉ Ｓ Ａ 试剂盒作比较。证明, 用表达蛋白作抗原的 Ａ Ｇ Ｉ Ｄ 和 Ｅ Ｌ Ｉ Ｓ Ａ 检测结果均为阴性反应, 而用市售 Ａ Ｇ Ｉ Ｄ 试剂盒检查有５４ 份马血清出现非特异性反应, 市售 Ｅ Ｌ Ｉ Ｓ Ａ 试剂盒检查也出现了非特异性反应, Ｏ Ｄ 值比表达抗原 Ｅ Ｌ Ｉ Ｓ Ａ 高３５ 倍。初步证明在 Ａ Ｇ Ｉ Ｄ 和 Ｅ Ｌ Ｉ Ｓ Ａ 法中, 表达抗原优于常规马传贫病毒抗原。 相似文献
11.
Molecular typing of enterotoxigenic Staphylococcus aureus isolated from bovine mastitis in Korea 总被引：3，自引：0，他引：3
Lim SK Joo YS Moon JS Lee AR Nam HM Wee SH Koh HB 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(5):581-584
One hundred and sixty-six Staphylococcus aureus isolates from mastitic milk samples from different cows on 26 farms were investigated for staphylococcal enterotoxins(SEs) and toxic shock syndrome toxin-1(TSST-1) by polymerase chain reaction(PCR) and reverse passive latex agglutination assay(RPLA). SEs and the TSST-1 gene were detected in thirty-seven isolates based on a multiplex PCR; SEA was detected in 32 isolates, SEB in 3 isolates, SEC in 1 isolate, and SEA and the TSST-1 gene in 1 isolate. Of the 37 enterotoxigenic isolates, thirty-three isolates were enterotoxigenic according to RPLA, where 29 isolates produced SEA, 3 isolates produced SEB, and 1 isolate produced SEC. The enterotoxin-producing S. aureus isolates were further characterized by pulsed-field gel electrophoresis(PFGE). A macrorestriction analysis revealed 11 PFGE patterns. Among the 33 enterotoxigenic S. aureus isolates, 45.4% exhibited the same PFGE pattern I. Accordingly, although the enterotoxin-producing S. aureus isolates from bovine mastitis were genetically diverse, 1 common genotype prevailed on the farms, indicating that PFGE pattern I isolates may be the most disseminated in Korea. 相似文献
12.
This preliminary study investigated the potential role of staphylococcal superantigens in the pathogenesis of canine pyoderma. The staphylococcal enterotoxins A (SEA), SEB, SEC and SED, and the toxic shock syndrome toxin-1 (TSST-1) were assayed in isolates from skins of dogs with pyoderma. Culture supernatants from 25 of 96 isolates were positive for multiple superantigens, with SEA and SEC being the most frequently detected. In in vitro stimulation of canine peripheral blood mononuclear cells and quantitative flow cytometry revealed that low concentrations of SEA and SEB were potent stimulators of blastogenesis of T cells. 相似文献
13.
Kitai S Shimizu A Kawano J Sato E Nakano C Kitagawa H Fujio K Matsumura K Yasuda R Inamoto T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(3):269-274
A total of 444 samples of raw chicken meat (thighs, breasts, wings, livers, gizzards, hearts and ovaries) that retailed at 145 different supermarkets in 47 prefectures in Japan were examined for contamination with Staphylococcus aureus in association with its enterotoxigenicity. S. aureus was isolated from 292 (65.8%) of the samples, and from 131 of the 145 supermarkets. There was no significant difference in the detection rate of S. aureus according to the type of meat examined. About 80% of 714 isolates belonged to the poultry (57.1%) and human biotypes (22.1%). Seventy-eight (21.7%) of 360 isolates were enterotoxigenic and isolated from 78 samples in 53 supermarkets in 31 prefectures. Staphylococcal enterotoxins (SEs) produced were SEB (50 isolates), SEA (14), SEC (8), SED (2), SEA+SEB (2), and SEA+SEC (2). Most of the enterotoxigenic isolates belonged to the human and poultry biotypes, coagulase type VII, VIII or IV, and were lysed by phages of group III. Identical SE types, biotypes, coagulase types and pulsed-field gel electrophoresis (PFGE) patterns were shown in isolates from different types of meat at the same supermarket and from samples taken from different supermarkets in the same prefectures or in isolates from samples obtained from several different prefectures. Among the 50 SEB-producing isolates, 27 yielded three similar PFGE patterns that differed by only a few fragments, suggesting that they were closely related genetically. The three patterns were found in isolates of samples that retailed at 17 supermarkets in 11 prefectures, indicating that they may be disseminated among raw chicken meat in Japan. 相似文献
14.
根据GenBank上公布的金黄色葡萄球菌肠毒素A（staphylococcus enterotoxin A,SEA）基因的全序列,设计一对特异性引物扩增内蒙古分离株的SEA基因序列。经基因克隆和序列测定,表明扩增的基因片段长度为582 bp,与标准菌株ATCC13565的SEA基因片段序列相似性为100%,与GenBank上公布的金黄色葡萄球菌菌株（EF520720.1）SEA基因相似性达到99.14%。本研究结果为进一步研究建立牛乳中SEA分子检测技术奠定了实验基础。 相似文献
15.
Gómez C Pinal L Franco J Carrillo JM Ramírez J 《Veterinary immunology and immunopathology》2007,117(3-4):249-253
A total of 41 isolates of Staphylococcus aureus obtained from bovine mastitis in 7 different states in Mexico were analyzed by the polymerase chain reaction (PCR) to determine the presence of encoding genes for enterotoxins A, B and C. The oligonucleotides were designed by specific regions of the sea, seb, sec genes. Surprisingly, none of the isolates presented the prospective amplification bands when they were run on agarose gels. On the contrary, reference strains CECT 976 SEA; CECT 5191 SEB; and CECT 4465 SEC showed the prospective amplification products. In order to confirm these results, enterotoxin production A, B, C, D, and E was determined by enzyme linked fluorescent assay (ELFA) using a MiniVIDAS system, on 15 Staphylococcus aureus selected at random from among the 41 isolates. None of the analyzed strains was positive to the test, whereas reference strains enterotoxins producing: CECT 976 SEA; CECT 5191 SEB; CECT 4465 SEC, CECT 4466 SED; CECT 5192 SEE produced concentrations of the toxins detected for this technique. The role of enterotoxins in the pathogenicity of S. aureus in bovine mastitis in Mexico is discussed. 相似文献
16.
I E Anderson 《Veterinary microbiology》1987,13(1):69-74
Four ovine abortion isolates, including the A22 vaccine isolate, and an isolate from a case of lamb arthritis, were compared by indirect immunofluorescence using antisera raised in chickens and mice. Cross titrations with homologous and heterologous antisera showed a one-way reaction between the single chlamydial isolate from a lamb with arthritis and the four isolates from cases of ovine enzootic abortion. The abortion isolates could not be distinguished. 相似文献
17.
Two hundred and ninety-three isolates of Staphylococcus aureus obtained from 127 bulk-tank milk samples of goats and sheep from Switzerland were characterised by pheno- and genotypic traits. Of the 293 S. aureus isolates, 193 (65.9%) were egg yolk-negative and 15 (5.1%) were negative for clumping factor and/or protein A determined by a latex agglutinating test system. For 285 isolates, PCR amplification of the 3' end of the coagulase gene showed a single amplicon. Five differently sized PCR products of 500, 580, 660, 740 and 820 bp were distinguished. In 191 isolates (n = 293) staphylococcal enterotoxin (SE) genes were detected: 123 isolates tested positive for SEC gene, 31 for SEG gene, 28 for SEA gene, 26 for SEJ gene, 24 for SEI gene, 4 for SEB gene and 4 for SED gene. Furthermore, 126 isolates were positive for the gene encoding the toxic shock syndrome toxin 1. Coagulase gene restriction profile analysis of the 145 isolates harbouring SEA or SEC genes revealed six different patterns using AluI and five different patterns using HaeIII. In summary, within these two groups, high genotypic uniformity within the different sized coagulase gene amplicons was demonstrated. This is the first study providing comprehensive characterisation data of S. aureus strains originating from bulk-tank milk samples of goats and sheep. Remarkable differences in phenotypic traits between S. aureus originating from goats and sheep and bovine milk were found. Moreover, the high prevalence of toxin-producing S. aureus may be important as it is relevant to food hygiene. 相似文献
18.
The ability of 309 staphylococcal isolates from household dogs to produce enterotoxin, coagulase, thermonuclease and hemolysin was investigated. A total of 52 (16.8%) isolates from 45 out of 150 dogs examined were enterotoxigenic when tested for enterotoxin types A, B and C. Based on sites sampled, 33 (20.5%) out of 161 isolates from the anterior nares were enterotoxigenic while from dorsal skins 19 (12.8%) out of 148 isolates were enterotoxigenic. Staphylococcal enterotoxin C(SEC) was predominantly produced as 21 (6.8%) isolates elaborated it and also accounted for 40.4% of all enterotoxins produced by isolates. Staphylococcal enterotoxins A(SEA) and B(SEB) were produced by 10 (3.2%) and 16 (5.2%) strains, respectively. Mixed enterotoxin types AB, AC and BC were produced by 1,3 and 1 strains, respectively. With human plasma, 17.1% of coagulase-positive and 15.0% of coagulase-negative strains were enterotoxigenic. However, using canine plasma, 19.1% and 6.9% of the coagulase-positive and negative isolates, respectively, were enterotoxigenic. The incidence of enterotoxigenicity was 16.9% amongst thermonuclease-positive isolates and 16.3% for thermonuclease-negative strains.Alpha hemolysin was predominantly produced by 180 (60.2%) isolates and 19.9% of these were enterotoxigenic. Beta hemolysin was produced by 36 (11.7%) isolates with 13.9% enterotoxigenic, while 87 (28.2%) exhibited gamma hemolytic pattern amongst which 11.5% were enterotoxigenic.Based on data provided on coagulation of human and canine plasmas and hemolytic patterns, it is concluded that a large proportion of canine isolates from this environment are not of canine biotypes, but are most probably human biotypes. 相似文献
19.
金黄色葡萄球菌耐药性及肠毒素分型研究 总被引：1，自引：0，他引：1
为了解从生鲜乳中分离得到的31株金黄色葡萄球菌的耐药性和肠毒素分布情况,用微量肉汤稀释法进行药敏试验,用PCR方法进行肠毒素的检测和分型。结果表明,31株金黄色葡萄球菌耐药率在50%以上的抗菌药有7种,药耐药率小于10%的有3种;敏感率大于50%的抗菌药有6种,敏感率小于10%的有5种。31株金黄色葡萄球菌毒素基因携带率为93.5%,同时携带2种及以上毒素的菌株占67.7%,有SEA基因的占38.7%,含其他传统的毒素基因类型SEB、SEC、SED和SEE基因的菌株只占40.4%,携带新发现的毒素基因SEG、SHE、SEI和SEJ的菌株占67.7%。说明本次试验中的31株金黄色葡萄球菌对6类13种抗菌药都有不同程度的耐药性,且多重耐药现象比较严重。生鲜乳中分离的金黄色葡萄球菌带毒率高,且携带新发现的肠毒素基因较多。 相似文献