共查询到17条相似文献，搜索用时 203 毫秒
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应用电镜技术对犬五联疫苗种毒的检查李成（中国农科院哈尔滨兽医研究所哈尔滨，１５０００１）李六金，阎庆润（中国人民解放军第四军医大学，西安）（辽宁省营口市兽医站，营口）犬五联疫苗种毒包括犬瘟热病毒、犬细小病毒、犬腺病毒、犬副流感病毒、狂犬病病毒。犬瘟热... 相似文献
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ELISA双抗体夹心法诊断犬冠状病毒肠炎 总被引：1，自引：0，他引：1
将电镜检查犬冠状病毒阳性的病犬粪便，经ＰＥＧ沉淀、蔗糖线性梯度超速离心，用提纯的抗原免疫豚鼠制备抗血清，经饱和硫酸铵粗提、ＱＡＥ－Ｓｅｐｈａｄｅｘ－Ａ５０层析柱纯化提取ＩｇＧ。将提纯的ＩｇＧ与辣根过氧化物酶（ＨＲＰ）标记，建立了诊断犬冠状病毒的ＥＬＩＳＡ双抗体夹心法。对收集的４５份粪便样品进行检测，并以电镜检查作为旁证，证明该法具有特异、敏感的特点，可在４小时内报告结果。 相似文献
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SPA—固相免疫电镜技术(SPA—SPIEM)是将 SPA 吸附于支持膜上,和动物 IgG 的Fc 端结合,活化 Fab 端,充分暴露抗原结合位点,促进抗原体反应,大大提高了电镜敏感性的一种免疫电镜技术。国外已有人用于植物病毒,腺病毒及轮状病毒。国内动物病毒方面,王正党等用于诊断犬出血性肠炎病毒及猫泛白细胞减少症病毒的感染,我们用此技术检测轮状病毒的感染,收到良好效果,结果报告如下: 相似文献
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犬腺病毒2型也称犬传染性喉气管炎病毒,可诱导宿主产生细胞免疫、体液免疫和黏膜免疫。将外源基因插入犬腺病毒2型早期转录区后可诱导宿主产生低水平的先天免疫,且能够在宿主体内安全、持续、稳定地表达外源基因,为基因转移提供了条件。犬腺病毒2型载体具有安全性和稳定性高、抗原表达能力强、易于进行各种遗传改造操作和携带大片段的外源基因等特点,是目前作为动物疫苗与基因治疗最有发展前景的非人类腺病毒载体之一。犬腺病毒2型载体已经广泛应用于动物疫苗研制、基因治疗等多个生物医学领域。笔者就犬腺病毒2型的分子生物学特性及犬腺病毒2型载体的发展、构建方式及在动物疫苗研制和基因治疗中的应用进行综述,旨在进一步挖掘犬腺病毒2型载体在基因治疗、动物疫苗研制中的作用,以及为下一代犬腺病毒2型载体平台的建设提供理论基础。 相似文献
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《畜牧兽医学报》2020,(8)
本研究旨在分离犬腺病毒(CAV)的北京地区流行株,采集北京地区某宠物医院2～4月龄发生咳嗽等呼吸道症状犬的鼻咽拭子,经胶体金和PCR检测,初筛为犬腺病毒阳性。经过处理后,将其处理液接种于MDCK细胞,进行连续传代培养,出现变圆、脱落、葡萄串样等特征性细胞病变。通过形态学观察、PCR鉴定及动物回归试验等方法对其进行鉴定。PCR扩增片段测序结果表明,该分离株为犬腺病毒Ⅱ型,遂将其命名为CAV-BJ02(GenBank:MN744708)株。用Reed-Muench法测得CAV-BJ02株的TCID_(50)为10~(6.7)·(100μL)~(-1)。电镜下可清晰地观察到呈正六边形的二十面体、直径在86 nm左右的犬腺病毒颗粒。遗传进化分析结果表明,本株病毒为CAV-Ⅱ型。动物回归试验结果表明,CAV-BJ02株可引起犬发热等轻微临床症状,以口鼻分泌物为主要排毒方式,排毒期为5～6 d,不导致犬死亡。上述研究结果为深入了解北京地区CAV的流行情况,为犬腺病毒病的诊断、防治及后续相关研究奠定了理论基础。 相似文献
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本研究旨在分离犬腺病毒（CAV）的北京地区流行株,采集北京地区某宠物医院2~4月龄发生咳嗽等呼吸道症状犬的鼻咽拭子,经胶体金和PCR检测,初筛为犬腺病毒阳性。经过处理后,将其处理液接种于MDCK细胞,进行连续传代培养,出现变圆、脱落、葡萄串样等特征性细胞病变。通过形态学观察、PCR鉴定及动物回归试验等方法对其进行鉴定。PCR扩增片段测序结果表明,该分离株为犬腺病毒Ⅱ型,遂将其命名为CAV-BJ02（GenBank：MN744708）株。用Reed-Muench法测得CAV-BJ02株的TCID50为106.7·（100 μL）-1。电镜下可清晰地观察到呈正六边形的二十面体、直径在86 nm左右的犬腺病毒颗粒。遗传进化分析结果表明,本株病毒为CAV-Ⅱ型。动物回归试验结果表明,CAV-BJ02株可引起犬发热等轻微临床症状,以口鼻分泌物为主要排毒方式,排毒期为5~6 d,不导致犬死亡。上述研究结果为深入了解北京地区CAV的流行情况,为犬腺病毒病的诊断、防治及后续相关研究奠定了理论基础。 相似文献
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Summary A case of simultaneous infection of the lungs of a dog with canine distemper virus (CDV) and canine adenovirus (CA V) is described. The techniques employed are histological stains, immunoperoxidase technique, and transmission electron microscopy. Two viruses are shown to infect the same cells. The significance of dual infection of the same cells is discussed in comparison with literature data on in vitro experiments. 相似文献
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A 10-year-old female Eurasian river otter (Lutra lutra) died after prolonged anorexia and weight loss in the Seoul Grand Park Zoo, Seoul, Republic of Korea. On necropsy, the liver was found to be swollen and friable with 1 lobe enlarged and necrotic. The other organs showed no significant alterations except for mild atrophy of the right kidney. Microscopically, there was multifocal hepatic necrosis. The hepatocytes around the necrotic areas were swollen and contained large basophilic intranuclear inclusions. Periportal infiltration by plasma cells and lymphocytes was also evident. Transmission electron microscopy revealed characteristic hexagonal virus particles sized approximately 70 nm in diameter in the nuclei of the hepatocytes, which were consistent with an adenovirus. Polymerase chain reaction of the formalin-fixed, paraffin-embedded liver sections was used to determine whether the virus was either the canine adenovirus type 1 (CAV-1), canine adenovirus type 2 (CAV-2), or some other viral agent. The results of these tests showed that the virus was CAV-1. To our knowledge, this is the first report on a CAV-1 infection in an otter. 相似文献
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T R Phillips J L Jensen M J Rubino W C Yang R D Schultz 《Canadian journal of veterinary research》1989,53(2):154-160
The effects of several commercially available polyvalent canine vaccines on the immune system of the dog were examined. The results demonstrated that the polyvalent vaccines used in this study significantly suppressed the absolute lymphocyte count and that most of the polyvalent vaccines significantly suppressed lymphocyte response to mitogen, but had no effect on natural effector cell activity, neutrophil chemiluminescence, nor antibody response to canine distemper virus. The individual vaccine components from the polyvalent vaccines when inoculated alone did not significantly suppress the lymphocyte response to mitogen. However, when canine distemper virus was combined with canine adenovirus type 1 or canine adenovirus type 2, significant suppression in lymphocyte responsiveness to mitogen occurred. The results indicate that interactions between canine distemper virus and canine adenovirus type 1 or canine adenovirus type 2 are responsible for the polyvalent vaccine induced suppression of lymphocyte responsiveness. 相似文献
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L E Perkins R P Campagnoli B G Harmon C R Gregory W L Steffens K Latimer S Clubb M Crane 《Journal of veterinary diagnostic investigation》2001,13(4):365-368
Adenovirus infections are documented in at least 12 different species of reptiles. In contrast to their mammalian and avian counterparts reptilian adenoviruses are not well characterized as to their pathogenic potential and their ability to cause primary disease. In the diagnostic setting, fresh tissues are often not available for virus isolation, and the confirmation of reptilian adenovirus infections is dependent largely upon electron microscopy for the identification of intranuclear viral inclusions associated with histopathologic changes. The diagnosis of adenovirus infection in 2 different species of snake was confirmed by the application of DNA in situ hybridization. Using an aviadenovirus specific oligoprobe, adenoviral DNA was observed in the nuclei of hepatocytes, Kupffer cells, endothelial cells, and enterocytes. Electron microscopy of the liver confirmed the presence of intranuclear viral particles morphologically consistent with an adenovirus. DNA in situ hybridization on formalin-fixed tissues can serve as a suitable alternative to electron microscopy in the diagnosis of reptilian adenovirus infections. Both affected snakes had other concurrent diseases, suggesting that the adenovirus may not have been the primary pathogen. 相似文献