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伪狂犬病弱毒疫苗与野毒株PCR鉴别诊断方法的建立 总被引：14，自引：0，他引：14
目前，在国内用于预防猪伪狂犬病的疫苗主要是基因缺失的弱毒（Ｂａｒｔｈａ－Ｋ６１）为了有效地地区弱毒免疫猪和野毒感染猪，本实验分别建立了一种通用和一种鉴别ＰＣＲ诊断方法，根据已发表的伪狂犬病病毒（ＰｒＶ）ｇＢ，ｇＥ基因的序列，设计并合成了两对引物：ＰＢ１／ＰＢ２和ＰＥ１／ＰＥ２，以疫苗株Ｂａｒｔｈａｋ－６１及野毒株Ｓ，Ｓｕ，Ｆ，Ｌ，Ｙ及闽Ａ（Ｍｉｎ－Ａ）ＤＮＡ为模板进行了ＰＣＲ扩增，结果显示用引物Ｐ 相似文献
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用表达马立克氏病病毒（ＭＤＶ（Ｉ型疫苗株ＣＶ１９８８／Ｒｉｓｐｅｎｓ糖蛋白Ｂ（ｇＢ）基因的重组鸡痘病毒（ｒＦ－ＰＶ－ｇＢ／Ｒ）和鸡痘病毒（ＦＰＶ）疫苗株２８２Ｅ４免疫１日龄不同品种的鸡,来评价２种病毒株的安全性及免疫母源抗体的商品是我毒性,而对无毒源抗体的ＳＰＦ鸡的毒性则不同。斑点杂交和Ｓｏｕｔｈｅｒｎ杂交产,ｆＦＰＶ－ｇＢ／Ｒ中无氨苄青霉素的抗性基因。 相似文献
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鸡传染性法氏囊病病毒野毒株VP2基因高可变区酶切位点分析 总被引：5，自引：1，他引：4
参照澳大利亚鸡传染性法氏囊病病毒（ Ｉ Ｂ Ｄ Ｖ）００２７３ 毒株基因组序列设计的 １ 对引物,位于 Ｖ Ｐ２ 高可变区两端,通过 Ｒ Ｔ Ｐ Ｃ Ｒ,扩增了 ５ 个 Ｉ Ｂ Ｄ Ｖ 山东分离株 Ｖ Ｐ２ 基因的 ６０７～１ ０８０ 位核苷酸片段（ａａ２０３～３０６）。 Ｐ Ｃ Ｒ 产物经纯化后,分别用 Ｄｒａ Ⅰ、 Ｓａｃ Ⅰ、 Ｓｓｐ Ⅰ、 Ｐｓｔ Ⅰ和 Ｓａｕ３ Ａ Ｉ共 ５ 种限制性内切酶（ Ｒ Ｅ）进行消化处理,结果 ５ 个分离株均为 Ｄｒａ Ⅰ（－ ）、 Ｓａｃ Ⅰ（－ ）和 Ｓａｕ ３ Ａ Ｉ（＋ ）, Ｌ Ｃ２ 和 Ｔ Ａ 株为 Ｓｓｐ Ⅰ（＋ ）, Ｌ Ｃ１ 和 Ｊ Ｎ 株为 Ｓｓｐ Ⅰ（－ ）, Ｌ Ｃ１ 和 Ｌ Ｃ２ 株为 Ｐｓｔ Ⅰ（＋ ）, Ｊ Ｎ、 Ｌ Ｌ 和 Ｔ Ａ 株为 Ｐｓｔ Ⅰ（－ ）;５ 个分离株的酶切图谱与美国变异株迥异,而 Ｔ Ａ 株与日本超强毒株 ９０１１ 相类似。５ 个分离株与现用疫苗株对比,至少在 Ｖ Ｐ２ 可变区内存在着一定的差异,这可能是 Ｉ Ｂ Ｄ Ｖ 接种免疫鸡群仍然暴发 Ｉ Ｂ Ｄ 的原因之一。 相似文献
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牛传染性鼻气管炎病毒TK基因缺失株与野毒株PCR鉴别诊断方法的研究 总被引：5，自引：0，他引：5
根据已发表的牛传染性敢管炎病毒（ＩＢＲＶ）ＴＫ基因和ｇＢ基因序列，应用Ｏｌｉｇｏ４．１程序设计两对引物ＰＴＫ１和ＰＴＫ２及ＰＢ１和ＰＢ２，分别对已构建的ＴＫ基因缺失（ＴＫ）ＩＢＲＶ以及ＩＢＲＶＬＡ株、洛精、美精、ＢａｒｔｈａＮｕ／６７株、Ｂ７株、云南－１和云南－２分离株进行了ＰＣＲ扩增，结果显示７株ＩＢＲＶＤＮＡ用引物ＰＴＫ１和ＰＴＫ２扩增产生４５７ｂｐ的特异性片段，而ＴＫＩＢＲＶ只出现１１０ｂｐ 相似文献
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新城疫病毒融合蛋白裂解位点基因的分离克隆及在原核细胞中的… 总被引：8，自引：4，他引：4
用ＳＰＦ鸡胚繁殖新城疫病毒（ＮＤＶ）Ｆ４６Ｅ９株（强毒）、ＬａＳｏｔａＥ４株（弱毒）、对病毒进行纯一提ＲＮＡ。用１对均为２７个碱基的引物进行ＲＴ－ＰＣＲ，扩增出了２个毒株的融合蛋白裂解位点（Ｆｃ）基因。将Ｆｃ基因定向克隆人ｐＵＣＬａＦｃ，用ＥｃｏＲＩ／Ｓａｌ Ｉ双酶切法、ＰｓｔＩ单酶切法、ＰＣＲ法和核酸探针法对其进行了鉴定。将鉴定好的ＬａＳｏｔａＥ４Ｆｃ基因定向导入表达载体质粒ｐＢＶ２２１，ａｑｔ 相似文献
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青海细毛羊生化遗传多态性的研究 总被引：7，自引：0，他引：7
采用聚丙烯酰胺凝胶电泳和火焰光度法对５０９只青海细毛羊细血液和乳汁中ＨＢ，ＥＰ－１，ＥＰ－２，ＫＥ，ＴＦ，ＡＭＹ１，ＡＭＹ２，ＥＳ，ＡＬＰ，ＲＢＣ－ＬＤＨ，Ｈｐα－ＬＡ和β－ＬＧ总共１３个位点的多态性进行了研究。结果为：（１）在青海细毛羊的ＨＢ，ＫＥ，ＴＦ，ＡＭＹ２，ＥＳ，ＡＬＰ，ＲＢＣ－ＬＤＨ１，Ｈｐ，β－ＬＧ总共９个位点上发现多态性，多态性位点的比例为６９．２３％；（２）每个位点实有的平均等位 相似文献
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用ELISA和PCR对猪,牛血清中HBV抗原,抗体及DNA的检测 总被引：4，自引：0，他引：4
用三个家生产的乙型肝炎（ＨＢ）ＥＬＩＳＡ试剂盒及聚合酶反应（ＰＣＲ）对牛、猪和羊血清分别进行了乙型肝炎病毒抗原（ＨＢＶ－Ａｇ）、抗体（Ａｎｔｉ－ＨＢＶ－Ａｂ）及ＤＮＡ的检测。ＥＬＩＳＡ共检出阳性牛血清１３份（１３／１３６），其中ＨＢ４Ａｇ阳性８份，ＨＢｅＡｇ阳性５份；阳性猪血清４份（４／３６），其中有ＨＢｅＡｇ阳性３份，ＨＢｅＡｇ阳性１份。全部阳性血清和部分阴性血清共１２０份经用ＰＣＲ检测ＨＢＶＤ 相似文献
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用三种不同鸡传染性法氏囊病强毒株,对ＢＷＥＬ－ＳＰＦ鸡群１－１０个家系３周龄鸡进行敏感性试验,观察比较鸡群各家系对不同敏感性,测定不同毒株的毒价。广西强毒株（ＩＢＤＶ－ＧＸ株）〈ＬＤ５０为１０＾５．０／０．２ｍｌ;湖南强毒株,ＬＤ５０为１０＾５．２／０．２ｍｌ;吉林强毒株（ＩＢＤＶ－ＪＬ株）,ＬＤ５０为１０＾５．５／０．２ｍｍｌ,以１００ＬＤ５０攻毒剂量,对ＢＷＥＬ－ＳＰＦ鸡１￣１０家系的致死率为 相似文献
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猪伪狂犬病病毒疫苗株与野毒株鉴别PCR检测方法的建立及初步应用 总被引：3，自引：2，他引：1
本试验根据疫苗株缺失gE基因、野毒株和疫苗株均有gB基因的特点,设计两对引物,建立了PCR方法,使用该方法分别对PRV、PCV2、PPV、CSFV、PRRSV进行PCR检测,结果只能从PRV Fa野毒株DNA提取物中扩增出354、237 bp的核苷酸片段,从PRV Bartha-K61疫苗株扩增出237 bp的片段,其他病毒均未扩出条带,达到了区分疫苗株与野毒株的目的。同时,应用该方法对吉林省各大猪场进行了临床病料检测,结果表明,在采集的205份病料中有32份检测为猪伪狂犬病病毒野毒感染,阳性率为15.6%。 相似文献
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HUANG Yuan CHEN Jing ZHAO Cui-ling CHEN Jin-liang XIANG Rong WANG Xiao-hu XIANG Hua HUANG Zhong 《中国畜牧兽医》2016,43(9):2461-2467
Due to variant strain,pseudorabies virus (PRV) has broken out again and spread in China since 2011.A swine farm in Guangdong province was found pseudorabies (PR) symptoms-like miscarriage after introduction.The study was carried out to identify and control the PR.Serum of sows with and without miscarriage were randomly collected and the PRV gB and gE were detected by ELISA method,and brain tissues of sick piglets were sampled and the PRV gH gene was tested by PCR.All the sows in the farm were emergently inoculated PRV variant strainin activated vaccine.Serum before and after immunization were collected and detected by ELISA and micro-serum neutralization test.ELISA results showed that gE antibody of all the breeding sows with miscarriage were positive,and that of sows without miscarriage showed weekly positive;The average gB ELISA S/P value of sows with miscarriage was as high as 4.0,while that of sows without miscarriage was over 3.0.PCR of 3 sick piglets were all positive and the sequence of gB gene was 100% identical to BJ-YT-2012,a wide variant stain in 2012. The result of detection of the sows serum at before and after immunization showed that the S/P value of gB rose up from 1.603 before immunization to 2.88 at four weeks after immunization,and the neutralizing antibody rose up from 1:24 to 1:213.This agreed with the results that the sows showed less probability of miscarriage since the first week after immunization and almost no miscarriage after two weeks after immunization.This study suggested that classical PRV vaccine was not effective in this case,while the vaccine made from the variant PRV strain was. 相似文献
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2011年以来伪狂犬病病毒（PRV）变异株在中国大范围流行致伪狂犬病（PR）再次暴发。广东某猪场发生疑似PR引起母猪较大范围的流产,为此本试验展开对该病诊断和防控方法的研究。随机抽取流产和未流产母猪血清,应用ELISA检测PRV gE和gB抗体;同时采集发病仔猪脑组织PCR检测PRV gH片段。对全场母猪紧急接种PRV变异株灭活苗,分别应用ELISA和中和试验检测免疫前后的血清抗体。结果显示,已发生流产母猪血清PR gE抗体均为阳性,而未流产母猪血清抗体见弱阳性;流产母猪PRV gB抗体的S/P值高达4.0,未流产母猪也达3.3。PCR检测3头病仔的脑组织均为阳性,测序表明其gB基因与2012年流行毒株BJ-YT-2012序列相似性为100%。ELISA检测免疫灭活疫苗前母猪血清PRV gB抗体S/P值为1.603,免疫4周后升高到2.88;特别是中和抗体从1：24升高到1：213。这与免疫疫苗1周后母猪流产开始减少,2周后母猪少见流产的结果吻合。研究结果提示,PRV经典株疫苗产生的PRV gB抗体对变异株的保护作用不佳,而变异株疫苗的保护效果显著。 相似文献
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Intradermal vaccination with plasmid DNA encoding envelope glycoprotein C (gC) of pseudorabies virus (PrV) conferred protection of pigs against Aujeszky's disease when challenged with strain 75V19, but proved to be inadequate for protection against the highly virulent strain NIA-3. To improve the performance of the DNA vaccine, animals were vaccinated intradermally with a combination of plasmids expressing PrV glycoproteins gB, gC, gD, or gE under control of the major immediate-early promotor/enhancer of human cytomegalovirus. 12.5 microg per plasmid were used per immunization of 5-week old piglets which were injected three times at biweekly intervals. Five out of six animals survived a lethal challenge with strain NIA-3 without exhibiting central nervous signs, whereas all the control animals succumbed to the disease. This result shows the increased protection afforded by administration of the plasmid mixture over vaccination with a gC expressing plasmid alone. A comparative trial was performed using commercially available inactivated and modified-live vaccines and a mixture of plasmids expressing gB, gC, and gD. gE was omitted to conform with current eradication strategies based on gE-deleted vaccines. All six animals vaccinated with the live vaccine survived the lethal NIA-3 challenge without showing severe clinical signs. In contrast, five of six animals immunized with the inactivated vaccine died, as did two non-vaccinated controls. In this test, three of six animals vaccinated with the DNA vaccine survived without severe clinical signs, whereas three succumbed to the disease. Comparing weight reduction and virus excretion, the DNA vaccine also ranged between the inactivated and modified-live vaccines. Thus, administration of DNA constructs expressing different PrV glycoproteins was superior to an adjuvanted inactivated vaccine but less effective than an attenuated live vaccine in protection of pigs against PrV infection. Our data suggest a potential use of DNA vaccination in circumstances which do not allow administration of live attenuated vaccines. 相似文献
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为评估猪伪狂犬病病毒（Pseudorabies virus,PRV）灭活疫苗（HN1201-ΔgE株）免疫后对PRV流行毒株和经典毒株的保护效果,本研究对试验猪分别免疫PRV灭活疫苗（HN1201-ΔgE株）和PRV活疫苗（Bartha-K61）,免疫后第0、7、10、14、17、21、24和28天采血测定PRV gB抗体,并分别使用PRV流行毒株HN1201株和经典毒株闽A株测定免疫后第0、7、14、21和28天血清的中和抗体水平,于免疫后第28天分别使用HN1201株和闽A株攻毒并观察,之后测定体温,测定攻毒后第7和14天PRV gE抗体,及攻毒后0~8 d的排毒情况。结果显示,HN1201-ΔgE免疫组较Bartha-K61免疫组gB抗体和中和抗体产生早,且抗体水平较高。两个免疫组试验猪在攻毒后虽然均无明显临床症状,且免疫组织化学检测（IHC）组织中的病毒抗原均为阴性,但HN1201-ΔgE免疫组试验猪脏器未见任何病理损伤,Bartha-K61免疫组试验猪部分脏器具有病理损伤。与未免疫对照组相比,2个免疫组试验猪在HN1201株和闽A株攻毒后,gE抗体转阳时间晚且排毒率低,HN1201-ΔgE免疫组gE抗体水平整体均低于Bartha-K61免疫组,攻毒后排毒检测中,Bartha-K61免疫组于2个毒株攻毒后第3~5天可检测到排毒,而HN1201-ΔgE免疫组全程未检测到排毒。研究结果表明,灭活疫苗（HN1201-ΔgE株）对PRV流行毒株和经典毒株均可提供完全保护。 相似文献
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Yoon HA Eo SK Aleyas AG Cha SY Lee JH Chae JS Jang HK Cho EG Song HJ 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2006,68(2):143-148
The prevalence and quantity of latent pseudorabies virus (PrV) in nervous tissues of pigs exposed to field strain in Korea was investigated by nested and real-time PCR. Nervous tissues including trigeminal ganglion (TG), olfactory bulb (OB), and brain stem (BS) were collected from 94 seropositive pigs. PrV latent infection in nervous tissues was initially investigated by nested PCR targeting three glycoprotein genes (gB, gE, and gG). Based on the obtained result, latent infection was detected in 95.7% of screened animals. Furthermore, it was revealed that the examined tissues harbored different copy numbers of latent PrV genome ranging from <10(2.0) to 10(7.1) copies per microgram of genomic DNA in real-time PCR analysis. These results show that under normal conditions, levels of latent PrV in the nervous tissues of pigs can vary across a wide range. Therefore, the data presented here provides information regarding control of the endemic state of PrV in Korea. 相似文献
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本实验通过设计针对伪狂犬病病毒gE基因的引物和MGB(Minor groove binder oligodeoxynucleotide conjugate,MGB-ODN)TaqMan探针,结合ABI PE7700荧光定量PCR仪器系统,建立了一种能区别伪狂犬病病毒野毒株和gE-疫苗株的快速检测方法gE-MGB-TaqMan PCR。实验表明,该方法可检测出最低43拷贝的gE基因和10~4倍稀释的伪狂犬病病毒Fa株DNA,与微量血清中和结合MTT比色法相比,灵敏度和特异性一致,检测时间仅为后者的1/10,操作比后者更为简单。特异性和重复性试验表明:gE-MGB-TaqMan PCR特异性和重复性好。该方法以闭管的模式操作,减少了各步骤污染的可能性,整个检测少于3 h。 相似文献
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伪狂犬病毒Sa株gI^-／gE^-／YFP^＋基因缺失载体构建及突变株筛选 总被引：1，自引：0，他引：1
根据伪狂犬病病毒sA株的gI和gE基因序列,设计两对引物,缺失掉gE基因5’端738bp,在克隆测序的基础上,采用酶切方法构建了含部分gE基因的转移载体pBgIE,同时将pBLYFP载体上含CMV启动子、多克隆位点、黄色荧光蛋白（YFP）基因和polyA尾巴的表达盒双酶切后插入到缺失位置,构建转移载体,命名为pBgIE—YFP,为下一步开发以伪狂犬病病毒为载体的基因工程疫苗提供了基础。 相似文献