共查询到20条相似文献，搜索用时 62 毫秒
1.
Orf virus (ORFV) causes contagious skin disease that mainly affects sheep and goats with zoonotic potential. However, there is not enough information about the association between ORFV and occurrence of skin disease in cattle. The present study describes outbreaks of ORFV infection in cattle in different provinces that are located in the Aegean, Central Anatolian and Mediterranean regions of Turkey. During the months of June and August 2017, vesicular fluid and scab samples were collected from cattle which had proliferative skin lesions. First, presence of lumpy skin disease virus (LSDV) and bovine herpesvirus 2 (BoHV-2, known as the causative agent of pseudo-lumpy skin disease) were investigated by real time PCR and PCR, respectively. Then, samples tested for the presence of parapoxviruses by PCR using primers specific to major envelope protein gene (B2L). Parapoxvirus DNA was detected in investigated samples whereas LSDV and BoHV-2 DNA were not detected. The analysis of the B2L gene sequences revealed that cattle were infected with ORFV. The isolates in the present study shared 100% sequence identity at the nucleotide and amino acid level when compared with previously characterised Turkish field ORFV isolates from goats in 2016. Results of the study show unusual infection of cattle with ORFV, and suggest that ORFV jumps the host species barrier from goats to cattle. 相似文献
2.
Kaizhao ZHANG Yihong XIAO Meng YU Jianxin LIU Qingnan WANG Pan TAO Sidang LIU Zhangyong NING 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(12):1639-1645
Orf virus (ORFV) is the causative agent of contagious ecthyma, which is a zoonotic
disease that affects sheep, goats, wild small ruminants and humans. Shandong Province in
East China is one of the main producing areas in China for sheep and goats. Here, we
conducted epidemiological surveys in different areas in this Province, isolated three orf
virus strains, SDLC, SDTA and SDJN, from goat flocks and then analyzed the genetic
evolution of these strains. The ORFV011, ORFV059,
ORFV109, ORFV110 and ORFV127 genes of these
three strains were amplified, sequenced and analyzed. Phylogenetic analysis showed that
ORFV011 of the SDLC and SDTA strains cluster together with the Gansu,
Liaoning, Shanxi, Nantou, Hoping and FJ-YX strains, while SDJN clusters with the FJ-GS and
FJ-GO strains. ORFV059 of the SDLC and SDTA strains cluster together with
the FJ-YX strain, while SDJN clusters with the FJ-GS and FJ-GO strains.
ORFV059 and ORFV127 of these three strains were
similar to those of the OV-SA00 strain. The results suggested that SDLC, SDTA and SDJN
originated from Fujian Province and formed a complex group of viruses in Shandong
Province. As the role of ORFV127 gene responsible for the immune evasion
of ORFV, the pathogenesis of these three virus strains may similar to that of OV-SA00.
These three strains first isolated in Shandong Province are novel ORFV strains, and the
data reported here will be helpful for further research about ORFV and its comprehensive
prevention and control. 相似文献
3.
为研究羊口疮病毒（Orf virus,ORFV）编码的锚蛋白（ankyrin,ANK）基因在感染宿主中的免疫调节作用,本试验从ORFV GDZC株感染的细胞病毒液中提取基因组DNA,用特异性引物进行PCR扩增、克隆出5个ANKs基因,并进行了基因序列及其编码蛋白的生物信息学分析。结果显示,获得的GDZC株ORFV008、ORFV123、ORFV126、ORFV128、ORFV129基因分别编码516、525、497、501和516个氨基酸,与OV-SA00毒株的核苷酸同源性最高,分别为98.3%、98.7%、97.9%、97.3%、98.0%。ORFV编码的5个ANKs都含有ANK结构域和F-box结构域,是结构保守蛋白。蛋白跨膜分析表明,ORFV123和ORFV128不含潜在跨膜区,ORFV129、ORFV008和ORFV126蛋白分别存在1、2和3个潜在跨膜区,且均不含信号肽。本研究结果为深入研究ANK在ORFV致病过程中作用和免疫逃逸机制提供了基础数据。 相似文献
4.
GE Shi-kun ZHANG Kai-zhao LIU Jian-xin WANG Qing-nan YU Meng TAO Pan NING Zhang-yong 《中国畜牧兽医》2016,43(12):3085-3093
To investigate the role of ankyrin proteins encoding by Orf virus (ORFV) in the immune modulation to host infection, five ankyrin (ANK) genes of ORFV GDZC strain were amplified using specific primers by PCR amplification and cloning from the viral genome DNA which extracted from virus infection cells,and their sequences and coding protein structure bioinformatics analysis were performed. The results showed that ORFV008, ORFV123, ORFV126, ORFV128 and ORFV129 consisted of 516, 525, 497, 501 and 516 amino acids, respectively, which shared a nucleotide identity of 98.3%, 98.7%, 97.9%, 97.3% and 98.0% with those of ORFV OV-SA00 strain, respectively. All of five ANK proteins contained ANK and F-box structural domain that showed they were structure conservative proteins. The analysis of protein transmembrane showed that ORFV123 and ORFV128 had no potential transmembrane domains, while the ORFV129, ORFV008 and ORFV126 had one, two and three potential transmembrane domains, respectively. And these ANK proteins had no signal peptide. These results provided the basic data for further study of the ANK proteins in the pathogenic and immune evasion mechanisms of ORFV. 相似文献
5.
根据NC-005336 ORFV全基因中gORF011设计合成一对引物。建立用于检测羊传染性脓疱病毒的PCR方法。此方法检测羊传染性脓疱病毒结果与病毒分离培养，电镜检查结果一致。经过对扩增产物进行序列分析，与NC-005336 ORFV的核苷酸序列同源性高达97.48％。通过特异性，敏感性及临床应用实验证明，此方法可以检测10^4ICID50浓度病毒；临床应用检出率为94．7％，显著高于病毒分离培养36．8％的检出率；并能与羊痘病毒，口蹄疫病毒鉴别；此方法用于检测羊传染性脓疱病毒是特异的、敏感的、可行的。 相似文献
6.
羊口疮病毒（ORFV）是重要的人兽共患病病原,不仅严重危害养羊业,而且威胁人类健康。干扰素刺激基因（stimulator of interferon genes,STING）作为细胞的DNA感受器,在机体天然免疫中起重要作用。为探索STING在ORFV感染中的作用及其对病毒复制的影响,本研究构建了ORFV感染羊胚胎鼻甲细胞（OFTu）的模型,分析了ORFV感染细胞后对STING及其相关基因的动态表达,探索了STING基因在干扰表达和过表达状态下对ORFV在细胞上增殖的影响。结果表明,ORFV感染OFTu细胞后,STING、cGAS、TBK1、IRF3、IRF7、IL-6、IFN-β、IL-1β和TNF-α的转录明显升高。OFTu细胞过表达STING可导致RIG-1、DDX41、IFI16、IRF3、IRF7、IL-6、TNF-α、IFN-α和IFN-β等基因转录上调。OFTu细胞在STING过表达状态下感染ORFV可介导TBK-1、IRF3、IFN-β和TNF-α的转录升高,抑制ORFV的复制;在STING表达干扰的状态下,ORFV感染OFTu细胞降低了TBK-1、IRF3、IFN-β和TNF-α的转录,增加了ORFV的复制。这表明STING蛋白能够增强抗病毒细胞因子的表达,抑制ORFV在OFTu细胞中的增殖,研究结果为深入理解STING在羊口疮病毒感染和复制中的作用提供了科学的理论依据,也为深入探索ORFV感染和致病的分子机制提供了基础数据。 相似文献
7.
根据GenBank中的羊传染性脓疱病毒(ORFV)B2L基因序列,设计合成1对引物,通过对PCR条件的优化,敏感性、特异性试验,成功建立了ORFV的PCR检测方法。敏感性与特异性结果显示,最低核酸检测量为1.2 fg/μL,对口蹄疫病毒、山羊痘病毒、丝状支原体山羊亚种的扩增结果均为阴性。同时根据GenBank中的ORFV的CBP基因的序列,设计合成1对特异性引物,以ORFV贵州分离株作为模板,成功克隆出ORFV的CBP基因。同源性分析表明,核苷酸与GenBank中ORFV的CBP基因的核苷酸序列相似性99.4%～88.8%。本研究为ORFV感染的流行病学调查和CBP基因功能研究奠定基础。 相似文献
8.
羊口疮病毒内蒙古株的分离与初步鉴定 《畜牧与饲料科学》2022,43(2):119-123
[目的] 确定内蒙古地区规模化养殖场发生的疑似羊口疮的病原。[方法] 无菌采集疑似羊口疮病料7份,经剪碎、研磨、离心等处理后接种山羊皮肤成纤维细胞（goat skin fibroblasts,GSFs）培养;对分离到的病毒毒株进行电镜观察;利用B2L基因引物进行特异性PCR鉴定,对获得的B2L基因序列测序,构建系统发育树,并进行同源性分析。[结果] 3份病料经GSFs培养48 h后出现明显病变,分离的病毒经负染后在电镜下观察呈卵圆形,病毒粒子长220~250 nm,宽125~200 nm,符合羊口疮病毒（orf virus,ORFV）粒子的形态特征,并将其命名为NM-ORFV-1株、NM-ORFV-2株、NM-ORFV-3株。分离株经B2L基因PCR鉴定获得1 137 bp的扩增产物,与预期一致;系统发育树及同源性分析显示,NM-ORFV-2株与NM-ORFV-3株遗传关系密切,处于同一分支,且与ORFV KP336704（中国）分离株的亲缘关系最近,同源性达到99.4%;NM-ORFV-1株与NM-ORFV-2株及NM-ORFV-3株处于不同分支,NM-ORFV-1株与NM-ORFV-2株的同源性为99.1%,与NM-ORFV-3株的同源性为99.0%,且与ORFV JQ904789（中国）疫苗株亲缘关系最近,同源性为99.6%。[结论] 内蒙古地区规模化养殖场疑似羊口疮病例的病原是ORFV。 相似文献
9.
根据GenBank中已经发表的羊传染性脓疱病毒毒株StrainNZ2的VIR基因序列,设计合成1对引物。采用PCR技术对内蒙古分离株（OV/nm-05）的VIR基因进行特异性扩增,然后将其克隆到pEASY-T1载体中进行测序,得到该病毒的VIR基因序列。序列分析表明,OV/nm-05株与1710/03株的同源性最高,达98.0%;与513/04株的同源性最低,为95.4%。说明羊传染性脓疱病毒内蒙古分离株VIR基因与其他参考毒株之间差异不大,这为进一步从分子生物学角度了解VIR基因的结构和功能奠定了基础。 相似文献
10.
Natalha Biondo Rejane Schaefer Danielle Gava Mauricio E. Cantão Simone Silveira Marcos A.Z. Mores Janice R. Ciacci-Zanella David E.S.N. Barcellos 《Veterinary microbiology》2014
Influenza is a viral disease that affects human and several animal species. In Brazil, H1N1, H3N2 and 2009 pandemic H1N1 A(H1N1)pdm09 influenza A viruses (IAV) circulate in domestic swine herds. Wild boars are also susceptible to IAV infection but in Brazil until this moment there are no reports of IAV infection in wild boars or in captive wild boars populations. Herein the occurrence of IAV in captive wild boars with the presence of lung consolidation lesions during slaughter was investigated. Lung samples were screened by RT-PCR for IAV detection. IAV positive samples were further analyzed by quantitative real-time PCR (qRRT-PCR), virus isolation, genomic sequencing, histopathology and immunohistochemistry (IHC). Eleven out of 60 lungs (18.3%) were positive for IAV by RT-PCR and seven out of the eleven were also positive for A(H1N1)pdm09 by qRRT-PCR. Chronic diffuse bronchopneumonia was observed in all samples and IHC analysis was negative for influenza A antigen. Full genes segments of H1N2 IAV were sequenced using Illumina's genome analyzer platform (MiSeq). The genomic analysis revealed that the HA and NA genes clustered with IAVs of the human lineage and the six internal genes were derived from the H1N1pdm09 IAV. This is the first report of a reassortant human-like H1N2 influenza virus infection in captive wild boars in Brazil and indicates the need to monitor IAV evolution in Suidae populations. 相似文献
11.
羊传染性脓疱(orf)是由羊传染性脓疱病毒(orf virus,ORFV)感染引起的绵羊和山羊的一种接触性人兽共患病。粒细胞-巨噬细胞集落刺激因子(GM-CSF)/白细胞介素(IL-2)抑制因子(GIF)基因为ORFV编码中晚期病毒基因,它能够与GM-CSF、IL-2结合并且抑制二者的活性,从而抑制宿主抗病毒作用。为了比较疫苗毒株和流行毒株间GIF的差异,本试验扩增并测定了ORFV疫苗株和野毒株的GIF基因序列,比较分析了ORFV疫苗弱毒株和野毒株GIF基因的核酸水平和氨基酸水平的差异情况,以及二、三级蛋白结构。结果表明:本次测定的ORFV疫苗株与野毒GIF基因核苷酸序列相似性为94.3%,氨基酸序列相似性为92.5%,两者的蛋白三级结构预测上也有差异。本研究结果为该病的防控提供了参考依据。 相似文献
12.
羊传染性脓疱病研究进展 《畜牧与饲料科学》2022,43(3):117-121
羊传染性脓疱病是由羊传染性脓疱病毒（orf virus,ORFV）引起的传染性极强且流行广泛的人畜共患病。健康羊只感染ORFV后,会在唇、鼻和口腔等无毛部位依次形成丘疹、水疱、脓疱及溃疡,最后形成疣状结痂,产生增生性损伤。羔羊由于免疫系统发育不完全尤其易感,发病后会导致采食困难、营养物质摄入不足,进而影响生长发育,严重者会因继发性感染而死亡。结合近年来国内外研究报道,从病原学、流行病学、临床症状、诊断方法、预防和治疗措施等方面对羊传染性脓疱病进行综述,以期为兽医临床中该病的预防、诊断和治疗提供参考。 相似文献
13.
口蹄疫病毒感染细胞的研究进展 总被引：1，自引：1，他引：0
口蹄疫是引起偶蹄动物的急性发热性水泡性疾病,具有高度接触传染性,对发病国家和地区经济有破坏性作用和不良的政治影响。口蹄疫病原体为小RNA病毒科的口蹄疫病毒,是一类单股正链RNA病毒,该病毒有多种血清型及其亚型,相互之间无交叉保护力或保护力极其有限。目前,口蹄疫病毒感染的分子机理还不是很清楚。口蹄疫病毒感染细胞的过程主要包括病毒与细胞的吸附、病毒穿透细胞壁进入细胞、病毒粒子的脱衣壳、病毒RNA的翻译转录、病毒基因组的复制以及病毒粒子的成熟过程,最后是成熟的病毒粒子衣壳包装成为完整病毒。文章就口蹄疫病毒感染细胞的过程做一概述。 相似文献
14.
甲型流感病毒(influenza A virus,IAV)对全人类的健康构成了持续性威胁,感染时会引发炎症性疾病。NOD样受体蛋白3(NOD-like receptor protein 3,NLRP3)炎性小体是一种天然免疫系统传感器,与甲型流感病毒感染引发的炎症反应相关。在宿主细胞被甲型流感病毒感染时,能够激活NLRP3炎性小体,促使pro-IL-1β和pro-IL-18剪切成熟的IL-1β和IL-18并分泌至胞外,进而引发炎症反应。研究表明,NLRP3炎性小体对于在甲型流感病毒感染期间诱导先天性免疫应答至关重要,并且由甲型流感病毒感染引发过度激活的NLRP3炎性小体与细胞因子风暴和不受控制的炎症反应有关。本文回顾了甲型流感病毒与NLRP3炎性小体之间关系的研究进展,并讨论了NLRP3炎性小体在甲型流感病毒致病机理中的保护作用和致病作用。 相似文献
15.
为了研究Raf激酶抑制蛋白（RKIP）对新城疫病毒（NDV）复制的影响,从鸡胚成纤维细胞中提取总RNA,采用RT-PCR方法扩增RKIP基因,将其克隆入真核表达载体pEGFP-N1中,经PCR、双酶切和测序鉴定,采用Fu-GENEHD法将阳性质粒转染Vero细胞,经G418筛选,有限稀释法获取单克隆细胞株,Western-blotting检测RKIP的表达。利用Real-time PCR测定病毒感染细胞后培养上清的病毒量。结果表明：成功构建鸡RKIP真核表达质粒;转染Vero细胞后经克隆化培养获得稳定表达鸡RKIP的细胞株Vero-RKIP;感染初期,NDV在Vero-RKIP上表现出了更强的复制能力。 相似文献
16.
为了建立鉴别绵羊痘病毒(SPPV)、山羊痘病毒(GTPV)和羊口疮病毒(ORFV)的多重PCR检测方法,针对GenBank中3种病毒的基因组序列,合成了3对引物,通过优化多重PCR反应条件,建立了鉴别检测3种病毒的多重PCR方法。特异性试验表明,应用该方法可分别扩增出3种病毒对应的目的片段,对大肠埃希菌、沙门菌、猪圆环病毒2型(PCV2)、猪细小病毒(PPV)、Vero细胞、正常羊组织的DNA和灭菌双蒸水均无扩增;敏感性试验表明,该方法最低检测量分别为30.46pg/μL的绵羊痘病毒、28.9pg/μL的山羊痘病毒和26.94pg/μL的羊口疮病毒基因组DNA;应用本方法对85份临床病料进行检测,结果与其他已建立的单项PCR检测方法结果一致,说明该方法可以用于临床上SPPV、GTPV和ORFV的鉴别诊断。 相似文献
17.
The interaction of bovine viral diarrhea virus (BVD virus) with its host has several unique features, most notably the capacity to infect its host either transiently or persistently. The transient infection stimulates an antiviral immune reaction similar to that seen in other transient viral infections. In contrast, being associated with immunotolerance specific for the infecting BVD viral strain, the persistent infection differs fundamentally from other persistent infections like those caused by lentiviruses. Whereas the latter are characterized by complex viral evasion of the host's adaptive immune response by mechanisms such as antigenic drift and interference with presentation of T cell epitopes, BVD virus avoids the immune response altogether by inducing both humoral and cellular immune tolerance. This is made possible by invasion of the fetus at an early stage of development. In addition to adaptive immunity, BVD virus also manipulates key elements of the host's innate immune response. The non-cytopathic biotype of BVD virus, which is capable of persistently infecting its host, fails to induce type I interferon. In addition, persistently infected cells are resistant to the induction of apoptosis by double-stranded RNA and do not produce interferon when treated with this pathogen-associated molecular pattern (PAMP) that signals viral infection. Moreover, when treated with interferon, cells persistently infected with non-cytopathic BVD virus do not clear the virus. Surprisingly, however, despite this lack of effect on persistent infection, interferon readily induces an antiviral state in these cells, as shown by the protection against infection by unrelated viruses. Overall, BVD virus manipulates the host's interferon defense in a manner that optimises its chances of maintaining the persistent infection as well as decreasing the risks that heterologous viral infections may carry for the host. Thus, since not all potential host cells are infected in animals persistently infected with BVD virus, heterologous viruses replicating in cells uninfected with BVD virus will still trigger production of interferon. Interferon produced by such cells will curtail the replication of heterologous viruses only, be that in cells already infected with BVD virus, or in cells in which the heterologous virus may replicate alone. From an evolutionary viewpoint, this strategy clearly enhances the chances of transmission of BVD virus to new hosts, as it attenuates the negative effects that a global immunosuppression would have on the survival of persistently infected animals. 相似文献
18.
Latency sites and reactivation of duck enteritis virus 总被引：16，自引：0，他引：16
Duck virus enteritis (DVE) is a contagious disease caused by herpesvirus in waterfowl populations. Recovered birds become carriers and shed the virus periodically. Reactivation of latent duck enteritis virus (DEV) has been implicated in outbreaks of DVE in domestic and migrating waterfowl populations. In this study, the sites for virus latency were determined in white Pekin ducks infected with the DEV-97 strain. At 3 wk postinfection, infectious virus was not detectable in tissues or cloacal swabs (CSs). At 7 and 9 weeks postinfection, the viral DNA was detected by polymerase chain reaction in the trigeminal ganglia (TG), suggesting that the virus is latent. Viral DNA was detected in the peripheral blood lymphocytes (PBL), spleen, thymus, bursa, and CSs only after in vitro cocultivation. In vivo virus reactivation was demonstrated when dexamethasone or a combination of dexamethasone and cyclophosphamide was inoculated in latently infected ducks. The reactivation of DEV occurred without any clinical evidence of the disease, but the virus was detected in PBL and CSs. We conclude from this study that DEV establishes latency in TG and lymphoid tissues including PBL. 相似文献
19.
Identification and eradication of bovine viral diarrhea virus in a persistently infected dairy herd.
A milking herd consisting of 55 Holstein cows had experienced abortions in several cows, as well as congenital malformations in 1 newborn calf. Bovine viral diarrhea virus was isolated from blood mononuclear cell samples obtained from several cattle, documenting 1 acute infection and 8 persistently infected carriers identified by clinical appearance and laboratory testing. Initial suspicion of persistently infected status in some, but not all animals, was facilitated by poor growth rates in some calves. Virus isolation was performed on transtracheal wash fluid obtained from acutely and persistently infected cattle with respiratory tract infection. We describe the measures taken to identify and characterize the infecting virus strain, and the series of actions taken to identify and eliminate persistently infected carriers in a herd experiencing several related problems that were shown to be caused by bovine viral diarrhea virus. 相似文献
20.
羊传染性脓疱皮炎病毒研究进展 总被引：6，自引：0，他引：6
羊传染性脓疱皮炎病毒（ORFV）是痘病毒科副痘病毒属的代表种,具有高度的嗜上皮性,主要引起人和动物的接触传染性皮炎。本病传染性强、发病率高,呈世界性流行,给养羊业带来巨大的经济损失,并对人类健康构成威胁,具有一定的公共卫生学意义。ORFV不同毒株抗原性的差异及被感染动物表现出临床症状的不同,给该病的诊断和防治造成了困难。作者对近年来国内外学者在病毒基因组的组成、病毒编码的主要功能蛋白、免疫特性、致病机理及诊断与防治等方面取得的进展作一综述,以期为ORFV的预防与控制提供科学依据。 相似文献