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为快速检测犬冠状病毒,研究利用胶体金免疫层析技术制备和评价犬冠状病毒抗原检测卡。试验通过将胶体金标记的CCV Ab1和鼠IgG涂布于聚酯纤维膜上作为标记垫,生物素耦联的CCV Ab2处理在样品垫上,链霉亲和素和羊抗鼠IgG包被于NC膜上分别为检测线和质控线,与吸水纸和PVC底板制备犬冠状病毒抗原胶体金检测卡,并对其评价。结果:该检测卡不与其他病毒发生交叉反应,可检测浓度低至2 ng/mL的样本,24月是稳定的。结论:该测试板具有良好的特异性、灵敏度、重复性和稳定性,并且与RT-qPCR的结果较符合。因此,该检测卡能快速、准确地检测犬冠状病毒,为动物临床诊断和治疗提供参考。 相似文献
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试验旨在快速检测犬巴贝斯虫抗体,利用胶体金免疫层析技术制备犬巴贝斯虫抗体胶体金检测卡并评价其功能性。将羊抗鼠免疫球蛋白G (IgG)和犬巴贝斯虫表面抗原Bg P47重组蛋白（Bg P47 Ag）包被于NC膜上分别做为质控线和检测线,胶体金标记的鼠IgG和鼠抗犬IgG均匀喷点在聚酯纤维膜上作为标记垫,将化学品配制的玻纤溶液均匀涂在样品垫上,并用吸水纸和PVC底板制备犬巴贝斯虫抗体胶体金检测卡,对其特异性、灵敏度、均一性、加速稳定性、实时稳定性进行评价,并与ELISA、PCR检测结果进行对比。结果显示,该检测卡不与犬莱姆抗体（lyme Ab）阳性犬血清、犬瘟热病毒抗体（CDV Ab）阳性犬血清、犬细小病毒抗体（CPV Ab）阳性犬血清、犬无形体抗体（Anaplasma Ab）阳性犬血清、犬三联疫苗阳性免疫犬血清样本发生交叉反应;可检测浓度稀释至1∶256倍的样本;有效期可达到24个月。研究表明,该检测卡可快速、准确地检测犬巴贝斯虫抗体,为动物临床诊断和治疗提供参考。 相似文献
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本研究通过细胞融合、间接ELISA方法筛选出4株可稳定分泌犬瘟热病毒(canine distemper virus,CDV)和犬细小病毒(canine parvovirus,CPV)单克隆抗体的杂交瘤细胞株,以此为基础研制了一种可同时检测CDV和CPV的胶体金二联检测卡,并对其特异性、灵敏度及准确性进行了测试。结果显示：4株杂交瘤细胞可稳定传代,分泌的单克隆抗体纯度高,效价均在1:320以上。制备的胶体金二联检测卡特异性强,只与CDV和CPV产生特异性条带,而不与其他犬类病毒反应;灵敏度高,最低检测限可达到102拷贝/μL;准确性好,与荧光定量PCR结果的符合率高于88.0%,与市面上单一病毒检测卡的符合率高于97.2%。结果表明,本研究制备的CDV、CPV胶体金二联检测卡特异性强、灵敏度高、准确性好,兼具操作简便、肉眼可判读、结果易保存和无需特殊仪器设备等优势,可用于两种疾病的临床快速诊断和大规模检测工作。 相似文献
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《上海畜牧兽医通讯》2017,(4)
近年来犬细小病毒病和犬冠状病毒病门诊量升高,2种病毒感染后临床症状相似,且存在混合感染、难以区别。本试验根据GenBank已发表的序列,应用Primer 5.0软件对CPV-2、CCV保守区设计引物,采用不同条件进行PCR反应,验证引物特异性,确定反应条件,建立了检测CPV和CCV的双重PCR检测方法。采用该方法对部分诊所收集的140份CPV和CCV疑似病例的病料进行病原学检测,将双重PCR检测结果与单个PCR检测和胶体金试纸检测结果进行对比。结果表明,该方法敏感性高于胶体金试纸,特异性高,双重PCR检测结果与单个PCR检测结果一致,可用于CPV和CCV的病原检测。 相似文献
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一起由犬冠状病毒和犬细小病毒引起的犬传染性肠炎 总被引：1，自引：0，他引：1
1984年某犬群发生了一种传染性肠炎。经电镜检出了犬冠状病毒(CCV)和犬细小病毒(CPV),并证实这次流行主要是CCV和CPV所致。今将情况报告如下。 相似文献
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犬细小病毒病免疫胶体金诊断技术的研究 总被引：21，自引：0，他引：21
建立一种简便、快速、准确检测犬细小病毒(CPV)的胶体金免疫层析法(GICA).采用柠檬酸三钠法制备胶体金颗粒,标记纯化的CPV单克隆抗体,在玻璃纤维素膜上喷加纯化的CPV多克隆抗体,制成诊断CPV抗原的快速诊断试纸条.用本试验研制的CPV试纸条检测收集到的120份犬粪便样品,其结果与HA结果相比对,HA效价在1:40以上,试纸条均能检测到为阳性.CPV试纸条与犬瘟热病毒及犬传染性肝炎病毒无交叉反应.且试纸条保存6个月后,其检测结果重复性为100%.试验证明,本研究建立的GICA是一种快速、灵敏、特异的抗原检测方法,可在临床上广泛应用,也可用于CPV的流行病学调查. 相似文献
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犬细小病毒PCR诊断方法的建立及对大熊猫粪便的检测 总被引：1，自引：0，他引：1
根据GenBank中登录的犬细小病毒(CPV) VP2基因序列,设计合成1对特异性引物;以CPV疫苗株为模板,建立了一种快速检测CPV的PCR检测方法,并应用于CPV诊断.结果显示,以此对引物进行PCR扩增能得到与理论设计值大小一致的342 bp的特异性条带,对犬瘟热病毒(CDV)、犬冠状病毒(CCV)、狂犬病病毒(RV)、新城疫病毒(NDV)和猫泛白细胞减少症病毒(FPV)扩增结果均为阴性;最低可检出约1.4 pg的病毒核酸;重复性试验结果表明,其检测重复性好;对45份临床宠物犬病料进行检测,并与免疫胶体金抗原检测拭纸捡测结果进行比较,吻合率为90.0％.将此方法初步应用于大熊猫粪便中细小病毒的检测,结果表明,从熊猫基地采集的52份正常大熊猫粪便样品中有8份为细小病毒阳性,阳性率为15.3％.大熊猫是通过自然感染还是弱毒苗感染细小病毒的机制还不清楚. 相似文献
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犬瘟热病毒、犬细小病毒和犬冠状病毒三重PCR检测方法的建立 总被引：1，自引：0，他引：1
参考Gen Bank上登录的犬瘟热病毒(CDV)、犬细小病毒(CPV)和犬冠状病毒(CCV)的基因序列保守片段分别设计特异性引物,建立了可以同时检测CDV(684 bp)、CPV(213 bp)和CCV(417 bp)的三重PCR方法。特异性结果表明,所建立的体系只能扩增CDV、CPV、CCV,而不能扩增犬腺病毒Ⅱ型(CAV-Ⅱ)和犬副流感病毒(CPIV);敏感性试验表明,该方法对CDV、CPV和CCV的最低核酸检测量分别为1.39×10-2、6.0×10-2和6.7×10-2copies/L,其敏感性比普通PCR高100倍。采用建立的三重PCR方法对北京、山东地区收集的临床粪便样品进行检测结果表明,使用三重PCR体系的扩增结果与单项PCR扩增结果一致,符合率为100%。以上结果表明该方法快速、敏感、特异性强,对上述3种病毒能够进行快速鉴定诊断,为临床诊断提供了快速简便的方法。 相似文献
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Objective
To determine whether dogs with spontaneously-occurring diabetes mellitus demonstrate serological reactivity to proinsulin.Sample population
Serum samples were collected from 15 newly-diagnosed diabetic, 15 insulin-treated diabetic and 15 non-diabetic control dogs.Procedures
Canine proinsulin was cloned into a prokaryotic expression vector to generate recombinant poly-histidine-tagged protein in Escherichia coli. A Western blotting assay was developed for detection of proinsulin autoantibodies in canine sera.Results
Reactivity to canine proinsulin was detected in 3 of 15 control dogs, 8 of 15 newly-diagnosed diabetic dogs and 6 of 15 insulin-treated diabetic patients. Of these reactors, only 1 control dog, 1 newly-diagnosed diabetic dog and 3 insulin-treated diabetic dogs recognised porcine insulin by ELISA, suggesting that the remaining proinsulin reactors might have been recognising proinsulin-specific epitopes.Conclusions and clinical relevance
This study suggests that proinsulin autoantibodies are present in a proportion of diabetic dogs. Further work is required to refine the assay and clarify the significance of these autoantibodies. 相似文献12.
Calretinin is a calcium-binding protein expressed abundantly in the central and peripheral neural tissues. It has been demonstrated to be a valuable marker in human testicular neoplasia. The immunohistochemical expression of calretinin has been studied in 102 samples of normal (n=25) and three different neoplastic canine testicular tumours (n=77). In normal canine testis, calretinin expression was restricted to Leydig and Sertoli cells of the testis. In tumour tissues, calretinin expression was detected in all tumours investigated (interstitial cell tumours, seminoma, and Sertoli cell tumours), with a cytoplasmic and nuclear pattern of cellular distribution. The present work reports, for the first time, calretinin immunohistochemical expression in normal and neoplastic canine testis. 相似文献
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Helen T. Michael Daisuke Ito Valarie McCullar Bin Zhang Jeffrey S. Miller Jaime F. Modiano 《Veterinary immunology and immunopathology》2013
NK cells are non-T, non-B lymphocytes that kill target cells without previous activation. The immunophenotype and function of these cells in humans and mice are well defined, but canine NK cells remain incompletely characterized. Our objectives were to isolate and culture canine peripheral blood NK cells, and to define their immunophenotype and killing capability. PBMC were obtained from healthy dogs and T cells were depleted by immunomagnetic separation. The residual cells were cultured in media supplemented with IL-2, IL-15 or both, or with mouse embryonic liver (EL) feeder cells. Non-T, non-B lymphocytes survived and expanded in these cultures. IL-2 was necessary and sufficient for survival; the addition of IL-15 was necessary for expansion, but IL-15 alone did not support survival. Culture with EL cells and IL-2 also fostered survival and expansion. The non-T, non-B lymphocytes uniformly expressed CD45, MHC I, and showed significant cytotoxic activity against CTAC targets. Expression of MHC II, CD11/18 was restricted to subsets of these cells. The data show that cells meeting the criteria for NK cells in other species, i.e., non-T, non-B lymphocytes with cytotoxic activity, can be expanded from canine PBMC by T-cell depletion and culture with cytokines or feeder cells. 相似文献
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《Comparative immunology, microbiology and infectious diseases》2014,37(5-6):313-320
In man, the combination of cancer and its treatment increases patients’ susceptibility to opportunistic infections, due to immune system impairment. In veterinary medicine little information is available concerning this issue. In order to evaluate if a similar dysfunction is induced in small animals undergoing chemotherapy, we assessed the complete blood count, leukocytic, plasma and fecal canine parvovirus (CPV) viral load, and anti-CPV protective antibody titers, in dogs with lymphoma treated with CHOP (cyclophosphamide, doxorubicin, vincristine and prednisolone) protocol, before and during chemotherapy.There was no evidence of decreased immune response, either at admission or after two chemotherapy cycles, indicating that the previously established immunity against CPV was not significantly impaired, supporting the idea that immunosuppression as a result of hematopoietic neoplasms and their treatment in dogs requires further investigation and conclusions cannot be extrapolated from human literature. 相似文献
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Takehisa Soma Tsuyoshi Ohinata Toshikazu Takahashi Motonobu Hara 《Research in veterinary science》2011,90(2):205-207
To clarify the prevalence of canine coronavirus (CCoV) infection in Japan, faecal samples from 109 dogs with diarrhoea were examined for CCoV RNA together with canine parvovirus type 2 (CPV-2) DNA. The detection rates of CCoV and CPV-2 for dogs aged less than 1 year were 66.3% and 43.8%, while those for dogs aged 1 year or older were 6.9% and 10.3%, respectively, which were significantly different (p < 0.0001 and p = 0.0003, respectively), indicating not CPV-2 but CCoV is an important diarrhoea-causing organism in juvenile dogs. Among the CCoV-positive dogs, 65.5% and 72.7% showed to be positive for CCoV types I and II, respectively, and simultaneous detection rate of both types was high at 40.0%. Furthermore, transmissible gastroenteritis virus (TGEV)-like CCoV RNA was detected from 8 dogs. These findings indicate that CCoV type I and TGEV-like CCoV are already circulating in Japan, though no reports have been presented to date. 相似文献
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应用噻胺酮对８条犬进行麻醉脑电图监测试验。应用ＳＪ－４２型生理多导仪描记术的麻醉脑电图。结果诱导麻醉后，犬的脑电图无论在波形，频率，还是波幅方面都发生了极为显著的改变，其主要特征是脑电由高低幅快节律转变为低频高幅慢节率。 相似文献
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Pattern-recognition receptors (PRRs) are important components of the innate immune system, enabling early detection of infection. Defective PRR function has been implicated in several infectious and immune-mediated diseases of human beings, including Crohn's disease (CD). Anal furunculosis (AF) is an immune-mediated disease which primarily occurs in German shepherd dogs (GSD) and could result from a similar type of PRR dysfunction. The aim of the current study was to investigate canine PRR responses in vitro and to test the hypothesis that these were altered in AF-affected GSD. The pattern-recognition receptors TLR1, TLR2, TLR4, TLR6, TLR9, NOD1 (nucleotide-binding oligomerisation domain) and NOD2 were evaluated in the DH82 canine monocyte/macrophage cell line. These cells were found to express mRNA for all the selected PRRs with TLR2 mRNA the most and TLR5 mRNA the least abundant. A similar pattern of expression was found in canine blood-derived monocyte/macrophages. Stimulation of DH82 cells and blood-derived monocyte/macrophages using specific PRR-ligands, resulted in expression of pro-inflammatory cytokine mRNA. Quantification of TNFalpha mRNA and protein secretion from stimulated cells demonstrated variable responses with lipopolysaccharide (TLR4 ligand) and PAM(3)CSK4 (TLR1/2 ligand) proving to be the most potent and CpG DNA (TLR9 ligand) the least potent. Comparing PRR responses in blood-derived monocyte/macrophages from healthy blood-donor dogs with those from AF-affected GSD showed a deficiency in the latter in response to LD-MDP (NOD2 ligand) at the mRNA level but not at the protein level. It is possible that dysfunctional NOD2 responses by cells of the monocyte/macrophage lineage are involved in the pathogenesis of AF. 相似文献
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犬卵巢囊肿切除术是兽医临床工作中常见的外科手术之一,但因手术过程中结扎止血效果不确实而存在较高风险,本文引入高频电刀对手术进行探究。 相似文献