共查询到19条相似文献，搜索用时 984 毫秒
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将猪圆环病毒2型(PCV-2)WH株通过颈部肌注和滴鼻感染26日龄PCV抗体阴性仔猪,于攻毒后28 d剖杀,采集相关的神经组织、消化器官及免疫器官进行免疫组化SABC法检测、病理学观察及PCR检测。免疫组化结果显示,在攻毒猪的大脑和小脑、胃、十二指肠、淋巴结、脾脏、扁桃体、肺、肾、肝存在阳性信号,心脏无阳性信号。阳性信号主要位于淋巴细胞和巨噬细胞的胞浆中,偶尔出现在细胞核内和上皮细胞中。免疫组化结果与病理学变化和PCR检测基本相符。结果表明,本试验建立的免疫组化SABC法,可用于定位PCV-2 WH株在体内不同组织器官中的分布情况。 相似文献
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为建立检测水貂犬瘟热病毒(mink canine distemper virus, CDV)的微滴数字PCR(droplet digital PCR,ddPCR)定量方法，以便提供水貂CDV在诊断检测方面的技术支持，本研究根据实时荧光定量PCR(real-time quantitative PCR,qPCR)检测方法原理，建立了水貂CDV数字PCR方法，并优化了反应条件，评估了特异性、敏感性以及重复性。结果表明：ddPCR方法检测CDV的最适引物浓度为900 nmol/L,探针浓度为250 nmol/L,退火温度为55℃,升降温度为2.5℃/s,最低检测下限为4.4拷贝/μL;除CDV特异性扩增，其他常见病毒特异性检测结果均为阴性；重复性试验的变异系数均小于5%。采用该微滴数字PCR和荧光定量RT-PCR方法对30份犬、貂、狐、貉等组织(其中CDV阳性样品7份)样品进行检测，检测结果与临床检测结果相符。本研究建立的微滴数字PCR方法对CDV定量检测特异性强、灵敏度高，重复性好，可以用于水貂CDV临床样品的核酸检测，对水貂CDV发病早期的诊断提供新的定量检测方法。 相似文献
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神经肽S及其受体在猪免疫器官中的表达及分布 总被引：1，自引：0，他引：1
本研究采用半定量RT-PCR方法,对神经肽S(NPS)及其受体(NPSR)mRNA在猪免疫器官中的表达水平进行检测。结果表明,NPSmRNA在胸腺、脾、空肠淋巴结和软腭扁桃体中均有表达,且在脾和胸腺中的表达水平较高;NPSR mRNA在脾脏的表达水平最高。进一步利用免疫组织化学法对NPS在猪免疫器官中的分布定位进行了研究,在猪脾脏和空肠淋巴结均有NPS免疫阳性细胞分布,但在软腭扁桃体和胸腺中未见NPS免疫阳性细胞。再进行免疫接种猪传染性胃肠炎疫苗,运用半定量RT-PCR技术检测免疫接种后不同时间(3、7、14 d)NPS及其受体mRNA在猪免疫器官中表达水平的变化规律。结果表明,NPS mRNA和NPSR mRNA在胸腺、脾、淋巴结和扁桃体中均有表达,且在一定时间范围内呈现先升高后下降的变化规律,但对照组无明显的升高和下降现象。上述结果提示,猪NPS可能参与免疫功能的调节。 相似文献
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犬瘟热病毒DNA疫苗接种犬的免疫保护 总被引：2，自引：0，他引：2
用犬瘟热病毒(CDV)囊膜糖蛋白基因(H、F)和核蛋白基因(N)重组质粒DNA和聚乙烯胺(PEI)混合后肌注10只3月龄CDV抗体阴性毕格犬,间隔30 d,共免疫3次,另选择5只犬作为阴性对照.免疫3次后,采用CDV攻毒.对照组呈现出犬瘟热的典型症状和组织病理损害,攻毒3周内,有2只犬衰竭死亡,1只犬症状明显,攻毒第18天外周血淋巴细胞中病毒RNA检测为阳性.DNA疫苗免疫组除出现一过性的体温升高外,未出现明显症状,攻毒后第18天外周血淋巴细胞CDV检测仍为阴性.DNA疫苗免疫后血清ELlSA抗体和病毒中和抗体测定显示,首免后机体激发的ELISA抗体滴度很低(101.25±0.615),二免后开始缓慢升高(101.69±0.285),再次免疫后达到102.051±0.214;中和抗体也呈现以上规律,三免后血清中和抗体为101.75±0.190,攻毒后血清ELISA抗体和中和抗体滴度迅速升高(103.02±0.202和102.41±0.245).试验表明CDV基因免疫对CDV的感染具有较好的保护作用,并能清除进入机体内的病毒.CDV基因免疫只激发较低水平的体液免疫,中和抗体在攻毒前达不到临界保护线(102),但对CDV攻击能产生较好的保护,推测其免疫效力可能源于细胞免疫和记忆性B淋巴细胞. 相似文献
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《畜牧兽医学报》2016,(12)
为了探索Ghrelin在驯鹿体内的表达及定位,采用实时荧光定量PCR(Real-time PCR)和免疫组织化学技术对其进行检测。Real-time PCR结果显示Ghrelin在所检测的17种器官中均有转录,在皱胃内的转录量最高,其次是胰、十二指肠、睾丸和食管,且转录量显著高于其他器官(P0.05);免疫组化结果揭示Ghrelin的免疫阳性细胞在食管和皱胃内主要分布于黏膜层、黏膜下层和肌层;在瘤胃、网胃、瓣胃的黏膜层、黏膜下层中也可见Ghrelin的免疫阳性细胞,但肌层中未见表达;在肠道主要位于十二指肠、空肠、回肠、结肠的黏膜层、黏膜下层和肌层,尤其在肠绒毛和黏膜下层分布较多;在肝、胰、甲状腺、垂体前叶、睾丸、肺、肾、脾器官内均有Ghrelin的免疫阳性细胞。Real-time PCR和免疫组化结果显示Ghrelin在所检测的器官内均有分布,且在食管和胃肠道内表达量及分布范围最为广泛,这表明Ghrelin对驯鹿的消化系统可能存在一定的调节作用。 相似文献
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为建立检测牛支原体的间接免疫组织化学(简称免疫组化)方法,分别以鸡抗牛支原体(Mycoplasma bovis)IgY、羊抗鸡IgG-HRP为一抗和二抗,对牛支原体菌体涂片和牛支原体阳性肺脏组织切片进行免疫组化染色,并对染色条件进行优化,确定组织触片及组织切片的最佳免疫组化条件。在最佳条件下对病死犊牛病料切片进行免疫组化检测,并以细菌分离培养和PCR方法进行验证。结果显示,免疫组化法阳性标本与分离培养和PCR结果相符,而阴性对照和替代试验均为阴性。结果表明本试验建立的间接免疫组化方法可用于检测临床病例组织样本及培养物中的牛支原体,具有特异性和可靠性,为探究该病原在机体内的定位、动态分布规律及致病机理提供了手段。 相似文献
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Kubo T Kagawa Y Taniyama H Hasegawa A 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(5):527-529
One hundred dogs that were positive for canine distemper virus antigen and inclusion bodies in the tonsils were examined for the distribution of inclusion bodies in various tissues. Inclusion bodies were found in the lungs (70 dogs), brains (20 dogs), urinary bladders (73 dogs), stomachs (78 dogs), spleens (77 dogs), and lymph nodes (81 dogs) of the dogs. Based on these results, the tonsils may be the most suitable tissue for detection of inclusion bodies in canine distemper. 相似文献
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Concurrent infection of a raccoon by rabies and canine distemper viruses is described. Fluorescent antibody (FA) test demonstrated rabies antigen in the brain of this animal, however, histologically only lesions characteristic of canine distemper infection were seen. We recommend testing tissues for rabies of animals that histologically are positive for canine distemper. 相似文献
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Cha SY Kim EJ Kang M Jang SH Lee HB Jang HK 《Comparative immunology, microbiology and infectious diseases》2012,35(5):497-504
Raccoon dogs (Nyctereutes procyonoides) are widespread and common in South Korea. In 2011, we obtained serum samples from 102 wild raccoon dogs to survey their exposure to canine distemper virus (CDV). Forty-five of the 102 animals (44.1%) were seropositive. Field cases of canine distemper in wild raccoon dogs from 2010 to 2011 were investigated. Fourteen cases of CDV infection were identified by a commercially available CDV antigen detection kit. These cases were used for virus isolation and molecular analysis. Sequence analysis of hemagglutinin genes indicated that all viruses isolated belonged to the Asia-2 genotype. H protein residues which are related to the receptor and host specificity (residues 530 and 549) were analyzed. A glutamic acid (E) residue is present at 530 in all isolates. At 549, a histidine (H) residue was found in five isolates and tyrosine (Y) residue was found in 6 isolates. Our study demonstrated that CDV infection was widespread in wild raccoon dogs in South Korea. 相似文献
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Distemper vaccination of farmed fur animals in Finland 总被引：1，自引：0，他引：1
The most important farmed fur animal species in Finland are the American mink (Mustela vison), blue fox (Alopex lagopus), silver fox (Vulpes vulpes) and raccoon dog (Nyctereutes procyonoides); all are susceptible to canine distemper. The only distemper vaccines currently available are for mink, although they also have been used for fox and raccoon dogs in emergency situations. The efficacy in eliciting neutralizing antibodies and the safety of three mink-distemper vaccines were studied under field conditions with mink and silver fox. Two of the vaccines were also studied with raccoon dogs and blue fox. All three vaccines elicited a satisfactory antibody response in mink, whereas the response varied in the other species. No side effects were observed in any species tested. One of the vaccines was safe and immunogenic in all four species. 相似文献
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为了调查患犬瘟热病犬淋巴组织中T、B细胞变化的特点及淋巴细胞减少的发病机制,试验通过免疫组织化学的方法观察了T细胞(用CD3和CD45RO检测T细胞)、B细胞(用IgG、IgM抗血清检测B细胞)和犬瘟热病毒(抗犬瘟热病毒抗体)在病犬淋巴组织中的分布。结果表明:在淋巴组织中的淋巴细胞、淋巴小结中树突状细胞和巨噬细胞中均检出了抗病毒阳性反应细胞。在骨髓组织的前髓细胞中也发现抗病毒阳性反应细胞和嗜酸性胞浆内及核内包涵体的存在。与对照组相比,CD3和CD45RO阳性细胞主要存在于T细胞的分布域;但CD3和CD45RO阳性T细胞的数量较少。位于淋巴组织中的巨噬细胞有的被CD45RO染成阳性。在B细胞分布的区域中,IgG、IgM阳性细胞的数量明显减少;一些位于淋巴组织的浆细胞也被IgG或IgM染成阳性。在淋巴组织中淋巴细胞减少的顺序为:IgG阳性细胞减少最明显,其次为IgM和CD45RO阳性细胞,再次为CD3阳性细胞。依据试验结果,作者认为病犬淋巴组织中淋巴细胞减少主要是由B细胞缺乏所引起的;淋巴细胞的增殖能力减弱是引起淋巴组织中淋巴细胞减少的重要原因。 相似文献
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Signaling lymphocyte activation molecule (SLAM) or CD150 can function as a receptor for the canine distemper virus (CDV) in vitro. The expression of SLAM was studied using immunohistochemistry in order to evaluate the presence and distribution of the receptor in dogs in vivo. Additionally, receptor expression was assessed after experimental infection of dogs with CDV. In 7 control dogs without distemper virus, the receptor was found in various tissues, mostly on cells morphologically identified as lymphocytes and macrophages. In 7 dogs with early distemper lesions characterized by presence of the virus, higher numbers of SLAM-expressing cells were found in multiple tissues recognized as targets of CDV compared with those in control dogs. These findings suggest that SLAM, a putative distemper receptor, is expressed in dogs in vivo. Additionally, virus infection is associated with up-regulation of SLAM, potentially causing an amplification of virus in the host. 相似文献
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The proliferation of footpad keratinocytes of canine distemper virus (CDV)-infected dogs was investigated. Footpads of 19 dogs inoculated experimentally with a virulent distemper strain (A75/17) and of two noninoculated control dogs were collected at necropsy. Dogs were divided into four groups according to results of the postmortem examination: dogs with severe distemper (group 1), dogs with mild distemper (group 2), inoculated dogs without distemper (group 3) and noninoculated dogs (group 4). There was no distinct difference of epidermal thickness among the four groups. Infection of the footpad epidermis with CDV was demonstrated using immunohistochemistry for viral nucleoprotein and in situ hybridization for nucleoprotein messenger ribonucleic acid (mRNA). Only group 1 dogs had viral antigen and mRNA in the footpad epidermis with the same distribution. Footpad epidermis of group 1 dogs had more mitotic figures in the basal layer, and significantly more basal keratinocytes were positive for the proliferation markers Ki-67 and proliferating cell nuclear antigen. Double-staining for Ki-67 and viral nucleoprotein identified rare double-labeled basal keratinocytes. These findings suggest that the presence of CDV particles in the footpad epidermis is associated with keratinocyte proliferation. 相似文献