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1.
《福建畜牧兽医》2020,(3)
本文所阐述的方法用猪流行性腹泻病毒活抗原和灭活抗原及其佐剂,分别免疫实验动物-大兔来制备猪流行性腹泻病毒高免血清。将多次免疫该病毒后无菌收获的兔血清用细胞中和抗体效价检测法测定,当血清中和抗体效价在1:256以上时(新兽药的规定标准为1:64),即对收获的该血清全部进行物理性状检验、无菌检验、支原体检验、特异性检验、外源病毒及其抗体的检测,检测结果均符合要求者才是合格的高免阳性血清。该血清可最终用于该类疫苗的鉴别检验、效力检验和该类疾病的诊疗过程。本方法大大降低了因用本体动物-猪来制备阳性血清而引发的同源动物其他外源病毒污染的风险。该高免阳性血清的成功制备,对猪流行性腹泻疫苗的研究提供了基础保障。 相似文献
2.
为满足乙型脑炎活疫苗的鉴别检验及外源病毒检验需求,以乙型脑炎活疫苗和灭活疫苗为免疫原,通过对SPF鸡进行反复免疫制备乙型脑炎特异性血清。当血清效价满足要求时,以心脏采血法采集血清,经分装、冻干后,开展纯净性检验、噬斑减少中和效价测定、特异性检验、剩余水分测定和均匀性检验,并对乙型脑炎活疫苗进行鉴别检验和外源病毒检验。结果显示:制备的乙型脑炎阳性血清无菌、支原体及外源病毒检验结果均为阴性,与口蹄疫病毒、猪圆环病毒、伪狂犬病病毒、猪瘟病毒、猪繁殖与呼吸综合征病毒、猪细小病毒和牛病毒性腹泻病毒等均无交叉反应,噬斑减少中和效价大于1:1 000,剩余水分<3%,且10个样品的效价测定结果组内、组间均无明显差异(P<0.05)。结果表明,制备的乙型脑炎阳性血清效价高,剩余水分少,纯净性、特异性、均匀性均良好,可满足乙型脑炎活疫苗的检验需求。 相似文献
3.
方法对全县14个县级以上规模猪场、六个乡镇的33个散养户共260份未免猪圆环病毒2型血样用ELI SA试验方法进行感染抗体检测及调查。结果260份猪血清样品,阳性数225份,阳性率86.5%;对合肥华杰畜禽有限公司圆环病毒2型未免场作圆环病毒2型感染血清横断面调查结果:种公猪血清数5、检验数5、阳性数5、阳性率100%;种母猪血清数5、检验数5、续阳性数5、阳性率100%;后备母猪血清数5、检验数5、阳性数5、阳性率100%;产房仔猪血清数5、检验数5、阳性数5、阳性率100%;断奶仔猪血清数5、检验数5、阳性数5、阳性率100%;生长中猪血清数20、检验数20、阳性数18、阳性率90%;育肥猪血清数5、检验数5、阳性数5、阳性率100%。结果表明猪圆环病毒2型已广泛分布全县各乡镇、各类型养殖场(户)、各层次的猪群(只)中,且感染率高、感染面广,呈地方流行趋势。 相似文献
4.
应用ELISA间接法检测猪流行性腹泻抗体的研究 总被引：2，自引：0，他引：2
应用猪流行性腹泻病毒(PEDV)吉(J)毒株猪胎肠单层细胞培养物,以冻融法制备抗原,建立了酶联免疫吸附试验(ELISA)间接法检测PED抗体的方法。对30头份经直接免疫荧光技术证实的PED病猪群血清测定,97％为阳性;检测32头份无PED猪场猪血清,93％为阴性。对1份PED“华毒株”,1份“川毒株”以及3头份“吉毒株”PED免疫血清测定,均为阳性。对猪传染性胃肠炎血清、猪轮状病毒病血清、疑似猪血球凝集性脑脊髓炎血清、鸡传染性支气管炎血清及猪梭菌性肠炎血清共16头份检测均为阴性,证明PEDV不与TGEV等其它3种冠状病毒血清发生交叉反应。89头份疫区猪血清的区域性试验阳性率为75％(67/89);对82头份屠宰猪血清测定,53％阳性。抗原包被板保存期试验表明,包被板在-20℃可保存2个月。 相似文献
5.
应用混合纤维素酯微孔滤膜作固相支持物进行斑点-ELISA(Dot-ELISA),对1337头份猪血清作了猪伪狂犬病血清抗体的检测。应用猪伪狂犬病高免血清和自然感染阳性血清作阻断试验,证明了本实验的特异性。猪瘟高免血清、猪细小病毒阳性血清、猪轮状病毒阳性血清、猪流行性腹泻阳性血清及未注过苗的健康猪血清均为阴性。与常规的病毒血清中和试验(NT)进行比较,Dot-ELISA阳性检出率为28.19％(53/188),NT阳性检出率为20.74％(39/188),前者的敏感性显著地高于后者。本法的优点是操作简便、省时、快速,不需特殊仪器设备,可用肉眼判定,诊断膜与试验标本膜可长期保存,适于基层单位的诊断和流行病学调查。 相似文献
6.
本文对一窝初生发生先天震颤仔猪,分别进行了猪传染性胃肠炎、猪流行性腹泻、轮状病毒、高致病性猪蓝耳病、猪瘟、猪伪狂犬、猪2型圆环等病毒核酸检测,结果检出高致病性猪蓝耳病和猪2型圆环病毒核酸阳性,未检出传染性胃肠炎、猪流行性腹泻、轮状病毒、猪瘟、猪伪狂犬等病毒核酸。 相似文献
7.
《中国畜牧兽医》1980,(2)
本文提出了应用免疫电子显微镜技术(IEM),作为检测和鉴定幼猪胃肠炎病例的粪便和肠内容物中的传染性胃肠炎病毒和轮状病毒(呼肠孤病毒样因子)的一种辅助诊断方法;并测定了应用直接IEM时的有关变数及其敏感性。在与同种的康复期抗血清相混合的病毒样品中,看到了被覆特异性抗体的病毒凝聚物;但是,在与感染前的血清或异种病毒所产生的抗体相混合的对照样品中则未见到。利用家兔抗猪IgG来加强聚集病毒抗体复合物的间接IEM,比直接IEM检出病毒的敏感性至少可提高10倍。用该技术研究了猪轮状病毒的大小和形态,其颗粒直径为55—70毫微米,并具有壳粒结构。在形态学上,猪轮状病毒与小牛和人的轮状病毒相似。应用IEM对每个病毒的特异性抗血清进行观察,发现猪轮状病毒在抗原性上与这两种病毒有关,与呼肠孤病毒3型则无关。 相似文献
8.
为制备鸭瘟种毒和鸭瘟活疫苗检验用抗鸭瘟病毒特异性阳性血清,对6个月龄左右的山羊进行五次免疫。最后一次免疫后2周采血并分离血清,血清经混合、分装、冷冻真空干燥后,对其进行了无菌检验、外源病毒检验、剩余水分测定、中和效价测定、均匀性检验。结果表明,本研究制备的抗鸭瘟病毒阳性血清特异性良好,无菌检验、外源病毒检验和剩余水分测定均符合《中华人民共和国兽药典》(2010年版三部)规定;血清中和效价大于1∶100,均匀性良好,可满足兽药典标准中鸭瘟种毒和鸭瘟活疫苗的鉴别检验和外源病毒检验。 相似文献
9.
《畜牧与兽医》2016,(9):32-37
将1份经RT-PCR检测猪轮状病毒阳性的临床腹泻粪样感染Vero细胞,连续盲传8代,出现病变,成功分离到1株病毒,经RT-PCR检验和电镜观察,鉴定该病毒为轮状病毒,命名为GD-01-2015。扩增该病毒的VP4和VP7基因进行分型和系统进化分析,结果发现,其VP4基因为P[7]型,与来自韩国的猪源毒株K71同源性达到99.8%;其VP7基因为G5型,与来自韩国的猪源毒株06-6-1同源性达到99.7%。由此可以推测GD-01-2015株与韩国猪源毒株有相似的进化来源。根据轮状病毒分类委员会(RCWG)提出的A群轮状病毒的最新分类方法,GD-01-2015株基因型为G5P[7]。本研究为监测轮状病毒的流行状况及其疫苗的研制提供了理论依据。 相似文献
10.
猪流行性腹泻病毒重组N蛋白间接ELISA检测方法的建立 总被引：1，自引：0，他引：1
为建立检测猪流行性腹泻病毒(PEDV)血清抗体的间接ELISA方法,本研究以原核表达的重组N蛋白作为检测抗原,优化ELISA反应条件,建立了PEDV间接ELISA抗体检测方法。该方法仅对PEDV血清检测为阳性,对猪传染性胃肠炎、猪轮状病毒感染猪的阳性血清检测结果均为阴性;其批内和批间重复性试验的变异系数均小于10%。采用建立的ELISA方法检测了130份临床样品,其中78份血清样品为PEDV抗体阳性。表明建立的以重组N蛋白为包被抗原检测PEDV血清抗体的方法可以用于检测PEDV感染及相关的流行病学调查。 相似文献
11.
J B Derbyshire 《Canadian journal of veterinary research》1989,53(1):52-55
The objective of this study was to compare the sensitivity of 11 porcine viruses to the antiviral effects of porcine interferon-alpha in serum from piglets which had been infected 19 h previously with transmissible gastroenteritis virus, and of porcine interferon-beta prepared in PK-15 cells by induction with polyinosinic:polycytidylic acid, in yield reduction assays in pig kidney cells which were treated with interferon before virus challenge, and both before and after virus challenge. The most sensitive virus to both types of interferon was vesicular stomatitis. A porcine isolate of bovine herpesvirus type 1, hemagglutinating encephalomyelitis virus and porcine enterovirus types 1 and 2 were also highly sensitive to interferon-alpha. There was little reduction in the yield of porcine parvovirus or porcine rotavirus, while swinepox, swine influenza and transmissible gastroenteritis viruses were intermediate in their sensitivity to interferon-alpha. In addition to vesicular stomatitis virus, porcine adenovirus type 3, swine influenza, hemagglutinating encephalomyelitis and porcine rotavirus were highly sensitive to interferon-beta, while swinepox, bovine herpesvirus type 1, porcine parvovirus, transmissible gastroenteritis and porcine enteroviruses were less sensitive than the above viruses to interferon-beta, although all showed significant reductions in virus yield. 相似文献
12.
Immune electron microscopy of transmissible gastroenteritis virus and rotavirus (reovirus-like agent) of swine. 总被引：8，自引：0，他引：8
Immune electron microscopy (IEM) was developed as a diagnostic aid for detecting and identifying transmissible gastroenteritis virus and rotavirus (reovirus-like agent) in fecal and intestinal contents from cases of gastroenteritis in young pigs. Variables involved in use of direct IEM and its sensitivity were determined. Aggregates of virus coated with specific antibody were seen in virus samples mixed with homologous convalescent antiserum, but not in control samples containing preexposure serum or antibody directed against a heterologous virus. At least a ten fold enhancement of the sensitivity of direct IEM for virus detection was accomplished using indirect IEM employing rabbit anti-porcine IgG to further aggregate virus-antibody complexes. The technique was used to investigate the size and morphology of the porcine rotavirus. Particles ranged from 55 to 70 nm in diameter and had capsomere structures. Morphologically, the porcine rotavirus resembled the calf and human rotaviruses. By IEM, employing specific antiserums for each virus, porcine rotavirus was found to be antigenically related to these 2 viruses, but not to the reovirus type 3. 相似文献
13.
Lorenzetti E da Silva Medeiros TN Alfieri AF Alfieri AA 《Veterinary microbiology》2011,154(1-2):191-196
Group A rotavirus (RV-A) with short electropherotype was identified by ss-PAGE in a neonatal diarrhea outbreak at a Brazilian pig farm where the sows were regularly vaccinated with a commercial vaccine containing OSU (G5P[7]) and Gottfried (G4P[6]) porcine RV-A (PoRV-A) strains. The ss-PAGE positive stool samples (n=20) were characterized as P[6] genotype by multiplex-nested-RT-PCR assay. The nucleotide analysis of the VP4 gene (VP8*) state that the viruses clustered in P[6] lineages that are also shared by RV-A strains identified in human hosts. Nucleotide analysis of the VP7 gene identified different lineages in G4 including a new lineage tentatively designated IX. The immunological pressure induced by commercial vaccine with a rotavirus containing a G4P[6] genotype of porcine origin (Gottfried strain) might have allowed the selection of PoRV-A strains with characteristics found in RV-A strains isolated of human hosts, such as P[6]-Ie and If, and promoted the selection or emergence of RV-A strains with a new lineage of the G4 genotype. The characterization of PoRV-A strains with unusual genotypes described in this study highlight the importance of surveys on the relationship between human and animal rotavirus strains. 相似文献
14.
猪病毒性腹泻三联疫苗的免疫研究 总被引：5，自引：1，他引：5
用猪传染性胃肠炎病毒、猪流行性腹泻病毒、猪轮状病毒制备的三联疫苗对８头怀孕母猪进行免疫，所产７３头仔猪保护率８９％；对１１０头仔猪进行口服免疫，２１天用三种强毒混合毒攻击，免疫组保护９２．７％，对照组发病８４．８％，经测定疫苗免疫期为４个月，干燥阴凉条件下保存期为１２个月。田间受免仔猪２７４４头，免疫保护９０％。 相似文献
15.
猪腹泻是全球养猪生产中最常见的疾病之一,病毒性腹泻具有传播快、致死率高和防控难的特点。常见的引起仔猪腹泻的病毒包括猪流行性腹泻病毒(PEDV)、猪传染性胃肠炎病毒(TGEV)和猪轮状病毒(PoRV),近几年新发现的猪δ冠状病毒(PDCoV)、猪嵴病毒(PKV)和猪急性腹泻综合征冠状病毒(SADS-CoV)也与仔猪腹泻相关。病毒分离是病毒感染诊断的金标准,也是进行病毒研究的前提。对上述6种常见猪肠道病毒的分离进展进行综述,可为掌握这些病毒的分离情况、疾病发展动向监测、疫苗研发以及猪腹泻病的防控提供参考。 相似文献
16.
轮状病毒是引起幼龄动物和儿童病毒性腹泻的主要病原,轮状病毒的分离鉴定为该病的流行病学调查和分子生物学特性研究奠定了基础。本研究采集北京某猪场腹泻发病仔猪肠内容物,将其接种MA104细胞,分离得到一株能产生明显细胞病变的病毒。对分离毒株进行胶体金、实时荧光定量RT-PCR和免疫荧光等方法鉴定,并对分离毒株的VP4、VP6和VP7基因进行测序及序列分析。结果表明,分离毒株为猪A群轮状病毒。按照A群轮状病毒的最新分类方法,确定该分离株VP4、VP6和VP7基因的基因型分别为P[13]型、I5型和G11型。因此,将该分离株命名为Rotavirus A pig/China/BJ/2015/G11P[13]。 相似文献
17.
Neonatal calf diarrhea induced by rotavirus 总被引：1，自引：0，他引：1
G Castrucci F Frigeri M Ferrari V Cilli G L Gualandi V Aldrovandi 《Comparative immunology, microbiology and infectious diseases》1988,11(2):71-84
This presentation summarizes the results of a comprehensive study on rotaviruses isolated in Italy from calves and rabbits affected by neonatal diarrhea. The results clearly indicated that rotavirus infection is widespread and supported the evidence for an etiologic role of these viruses in neonatal diarrhea. The evidence of differences in virulence among bovine rotaviruses appeared also to be confirmed. Conventionally reared calves were fully susceptible to the experimental infection induced by three rotaviruses originating from heterologous hosts, i.e. monkeys, pigs and rabbits, respectively. When rotavirus strains of bovine, simian, porcine and rabbit origin were compared by cross neutralization tests, it was found the simian and porcine strains were indistinguishable and both appeared to relate antigenically to the bovine strain. On the other hand, a reciprocal antigenic correlation was found between bovine and rabbit isolates. Finally, it was proven that feeding newborn calves with colostrum of their dams, previously vaccinated with an inactivated rotavirus vaccine, could prevent the neonatal diarrhea from occurring. 相似文献
18.
YUAN Lin HAN Tao NI Jian-qiang KANG Wen-hua WANG Bao-yue LI Xiao-xia CHEN Ya-na ZHAI Xin-yan SHEN Jian-zhong 《中国畜牧兽医》2016,43(12):3306-3313
Rotavirus infections are a major cause of viral diarrheas in young animals and children. Isolation and identification of rotavirus make a contribution to epidemiological survey and molecular biology study.A strain of porcine rotavirus was isolated in MA104 cell cultures from the intestinal contents of piglets with diarrhea in Beijing.The virus was identified to be porcine rotavirus by immunochromatography strip test, Real-time RT-PCR, immunofluorescence test and sequencing analysis.According to the sequence analysis, the virus was classified as group A porcine rotavirus, the genotype of VP4, VP6 and VP7 genes belonged to P[13], I5 and G11, respectively.The virus was designated Rotavirus A pig/China/BJ/2015/G11P[13]. 相似文献
19.
青海地区猪流行性腹泻的病原诊断 总被引：1，自引：1，他引：0
对青海地区疑似猪流行性腹泻病料进行了细菌学和轮状病毒核酸电泳的诊断。试验结果:排除了致病菌和轮状病毒的病原感染;乳猪回归试验,复制出与自然病例相同的临床症状;病料经处理后与猪流行性腹泻病毒免疫血清发生特异性凝集;与猪传染性胃肠炎病毒荧光抗体染色呈阴性反应;与猪流行性腹泻病毒免疫血清进行间接荧光染色时,在细胞浆内见到了特异性荧光;电镜观察到冠状病毒科的病毒颗粒。从而确诊青海地区猪流行性腹泻病原为猪流行性腹泻病毒,代号为PEDV—青毒1株。 相似文献
20.
G. Castrucci M. Ferrari F. Frigeri V. Traldi V. Angelillo 《Comparative immunology, microbiology and infectious diseases》1994,17(3-4):321-331
This review summarizes the results of a study on rotaviruses isolated from calves affected by neonatal diarrhea.
The results indicated that rotavirus infection is widespread and supported the evidence for an etiologic role of these viruses in neonatal diarrhea. Differences in virulence among bovine rotaviruses appeared also to be confirmed.
Conventionally reared calves were fully susceptible to the experimental infection induced by rotaviruses originating from heterologous hosts, i.e. monkeys, pigs and rabbits.
When rotavirus strains of bovine, simian and rabbit origin were compared by cross neutralization tests, it was found the simian and porcine strains were indistinguishable and both appeared to relate antigenically to the bovine strain.
Finally, it was proven that feeding newborn calves with colostrum and first milk of their dams, previously vaccinated with an inactivated adjuvanted rotavirus vaccine, could prevent the neonatal diarrhea from occurring. 相似文献