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1.
正锦鲤疱疹病毒病是危害黑龙江省鲤鱼养殖业发展的疾病之一,目前本病无有效地治疗方法,只能及早诊断,做好疾病的预防和控制工作。本文就锦鲤疱疹病毒病的诊断方法和防控措施进行简要介绍。锦鲤疱疹病毒病(Koi herpes virus disease,KHVD),是严重威胁鲤和锦鲤养殖业安全的一种世界性疾病,世界动物卫生组织(OIE)将其列为必须申报的疾病,我国将其列为二类动物疫病。病原为异样疱疹病毒科,鲤病毒属,锦鲤疱疹病  相似文献   

2.
锦鲤爆发性出血病病原电镜观察和PCR检测研究   总被引:1,自引:0,他引:1  
2002年春季以来,广东省数家锦鲤养殖场爆发了烈性锦鲤疫病,其临床症状和流行病学特征与在英国、以色列、美国等国家报道过的锦鲤疱疹病毒病(KHVD)极相似,各种抗生素治疗均无效,临床初步诊断为由锦鲤疱疹病毒(Kio Herpesvirus,KHV)引起的锦鲤爆发性出血病.  相似文献   

3.
锦鲤疱疹病毒病(koi herpesvirus disease,KHVD)是由锦鲤疱疹病毒(koi herpesvirus,KHV)感染锦鲤、鲤及其普通变种如框镜鲤等而导致的一种具有高度传染性和致死性的疾病。该病多发生在水温为18℃~28℃的春秋季节,具有高度传  相似文献   

4.
为提升实验室对锦鲤疱疹病毒病(koi herpes virus disease,KHVD)病原检测的能力,加强水生动物防疫系统实验室能力建设,本实验室参加了2020年由全国水产技术推广总站组织的锦鲤疱疹病毒病病原检测能力测试。按照中国检验检疫科学研究院下发的《能力测试作业指导书》,结合水产行业标准《鲤疱疹病毒检测方法第1部分:锦鲤疱疹病毒》(SC/T 7212.1-2011)对样品进行鉴定,检测结果为满意。另外,本实验室选用3种商品化的锦鲤疱疹病毒实时荧光定量PCR检测试剂盒(A、B、C),以本次参测盲样为样品进行了试剂比对,试验结果表明:只有A与作业指导书要求的《SC/T 7212.1-2011》检测结果完全相同,B和C均未检测出阳性盲样。  相似文献   

5.
2017年6月,天津市滨海新区、北辰区等地一些养殖场的锦鲤出现急性死亡,发病3 d后死亡率高达85%以上。病鱼呈现眼部凹陷、烂鳃、内脏出血等临床症状,初步诊断为锦鲤疱疹病毒病。针对锦鲤疱疹病毒(KHV/CyHV)的TK、SphI-5、ORF25、ORF56、ORF81基因设计特异性引物,建立PCR方法进行KHV基因检测。结果显示:死亡疑似病例的KHV检测阳性;测序获得的TK、SphI-5、ORF25、ORF56、ORF81基因片段长度分别为409、300、317、939和156bp,与CyHV-3-J2病毒株基因序列同源性为97.6%~100%。系统发育树分析显示,其与CyHV-3亲缘关系最近,自然聚为一支,最终确定为CyHV-3型。以上研究为锦鲤疱疹病毒病的分子诊断及流行病学调查奠定了基础。  相似文献   

6.
锦鲤疱疹病毒病简述   总被引:1,自引:0,他引:1  
锦鲤疱疹病毒病是一种危害严重,尚无有效治疗方法的高致病性传染病。本文汇集大量科研成果,从病原学、流行病学、病理学三个角度对该病毒的特性进行简述,在此基础上,推荐了实验室检测技术,提出了防控建议。  相似文献   

7.
锦鲤疱疹病毒病的传入风险评估   总被引:1,自引:0,他引:1  
锦鲤疱疹病毒病(KHVD)自1997年首次报道以来,在全球多个国家传播流行,给鲤鱼及锦鲤养殖业造成重大经济损失。我国是鲤鱼养殖和贸易大国,KHVD严重威胁着我国鲤鱼的健康养殖。本文分析了KHVD在全球的流行分布情况和不同地区的病原差异,并在此基础上评估了病毒跨界传播的风险,预测了KHVD的流行形势,提出了相应的防控建议,为我国KHVD防控措施的制定提供了参考。  相似文献   

8.
《饲料工业》2004,25(5):63-63
台湾近日大范围发生锦鲤疱疹(KHV),遭传染的锦鲤大面积死亡。记者从广东检验检疫部门及广东省海洋渔业局获悉,广东鱼类市场暂未发现KHV鱼病毒。但有关部门提醒,由于KHV传染性较强,各农产品进口商进口鱼类时要多加注意。据悉,台湾目前流行的KHV鱼病毒,造成市场价格高昂的锦鲤大量死亡。而该种病毒亦曾在以色列、印尼、日本等国大面积爆发,去年冬季KHV在日本爆发,造成660t、大约330万条的鲤鱼感染死亡,其渔业损失金额超过了1.5亿日元。台湾省发生锦鲤疱疹  相似文献   

9.
正锦鲤疱疹病毒(Koi herpesvirus,KHV),又称鲤疱疹病毒3型,是鲤科新发病原。KHV基因组为线性双链DNA,大小为295 kb,编码156个开放阅读框。KHV对普通鲤鱼和锦鲤具有强致病性,引起锦鲤疱疹病(KHVD),该病自20世纪90年代末发现以来,随着国际鱼类贸易,目前已遍布全球,给普通鲤鱼和锦鲤养殖业造成了巨大的经济损失。  相似文献   

10.
为建立一种快速检测锦鲤疱疹病毒(CyHV-3)的环介导等温扩增方法(LAMP),本研究根据Gen Bank中登录的CyHV-3 Sphi基因编码区序列设计了LAMP特异性引物,经反应体系和反应条件优化,建立了检测CyHV-3的LAMP方法。结果表明,本研究建立的LAMP检测方法与鲤痘疱疹病毒、金鱼造血器官坏死病病毒和鳗鱼疱疹病毒均无交叉反应,特异性强;最低检出率为13.9拷贝/μL,灵敏度高。使用LAMP方法和普通PCR方法对四川地区的15个检测点采用鱼鳃拭子非致死性采集的临床样品进行检测,阳性检出率均为31.40%(27/86)。表明本实验建立的该检测方法具有高灵敏度、高特异性、快速和简便的特性,适用于临床上对锦鲤疱疹病毒病的快速诊断。  相似文献   

11.
Cyprinid herpesvirus 3 (CyHV-3), also known as koi herpesvirus (KHV), is a highly infectious causative agent to common carp and koi worldwide. The virus is mainly consisted of European and Asian genotype isolates. To date, no European genotype CyHV-3 has been found emerging in the East and Southeast Asian regions. In late March 2011, an outbreak of CyHV-3 disease occurred in Guangzhou City, Guangdong Province, China, resulting in the deaths of approximately 200 large-sized adult koi within four weeks. One moribund koi was sampled for CyHV-3 isolation. Thus, a CyHV-3 was isolated in KCF-1 cells and designated as KHV-GZ11. Abundant mature or immature virions in infected KCF-1 cells were observed under a transmission electron micrograph. In addition, intra-nuclear inclusion body-like structures with masses of virions were also observed. Based on the TK and ORF136H genes, the sequence analyses revealed that KHV-GZ11 is a distinct European genotype of CyHV-3. Moreover, the infectivity experiment showed that KHV-GZ11 was highly virulent to koi. In summary, we are the first to confirm the emergence of fatal European genotype CyHV-3/KHV in East and Southeast Asia. Our study will provide new insight to explore the virus origin and epidemiology, as well as its pathogenicity.  相似文献   

12.
Cyprinid herpesvirus 3 (CyHV-3), a member of the family Alloherpesviridae is the causative agent of a lethal, highly contagious and notifiable disease in common and koi carp. The economic importance of common and koi carp industries together with the rapid spread of CyHV-3 worldwide, explain why this virus became soon after its isolation in the 1990s a subject of applied research. In addition to its economic importance, an increasing number of fundamental studies demonstrated that CyHV-3 is an original and interesting subject for fundamental research. In this review, we summarized recent advances in CyHV-3 research with a special interest for studies related to host-virus interactions.  相似文献   

13.
Outbreaks of koi herpesvirus (KHV) infection in carp are still a serious problem worldwide. KHV is closely related to other two cyprinid herpesviruses, pox herpesvirus (CHV) and haematopoietic necrosis herpesvirus (CyHV-2) in goldfish. In this study, two major KHV antigenic proteins (ORF62 and ORF68) were identified by immunoscreening using a KHV-specific polyclonal antibody, and then monoclonal antibodies were generated for immunodiagnostic studies. After screening hybridoma cells, one mAb against ORF68 (mAb-7C6) was obtained but no mAbs against ORF62. mAb-7C6 specifically reacted with a lysate of KHV-infected koi fin cells (KF-1 cells) but not with lysates of CHV- or CyHV-2-infected KF-1 cells in an immuno-blotting analysis. Similar results were shown in the following tests: (1) a indirect fluorescent antibody test using infected KF-1 cells and (2) an immunohistochemical investigation by fast red stain (infected liver) or FITC detection (infected spleen). These results suggested that mAb-7C6 specifically reacts with KHV ORF68 protein.  相似文献   

14.
Herpesvirus-associated papillomas in koi carp (Cyprinus carpio).   总被引:1,自引:0,他引:1  
From January through November 1994, 32% (7/22) of koi carp (Cyprinus carpio) maintained in indoor aquariums developed proliferative cutaneous lesions that consisted of single to multiple 2-10-mm whitish to pink fleshy masses usually associated with fin rays. Although scaleless koi were more commonly affected (3/6) than were normally scaled koi (4/16), the difference in incidence rates was not significant (chi2 text, P > 0.05). Lesions typically resolved spontaneously in 1-3 wk, occasionally persisted for >3 mo, and recurred in several fish after 2-5 mo. Fish were otherwise asymptomatic. Wet mount preparations from lesions were densely cellular and consisted of hyperplastic epidermal cells of normal morphology without parasites or inflammatory cells. Histologically, biopsies were consistent with papillomas and were characterized by a marked benign epidermal hyperplasia without inclusion bodies or inflammatory infiltrate. Transmission electron microscopic examination revealed intranuclear and intracytoplasmic herpesvirus virions. Virus isolation attempts were unsuccessful.  相似文献   

15.
An acute infectious diseases occurred in a koi farm in Fangshan district, Beijing, and it resulted in mortalities of more than 50%.The main symptoms of sick koi were gills necrosis, kidney erosion and edema,which were similar to the clinical signs of koi herpes virus disease (KHVD).But PCR tests showed negative results for KHV. For further diagnosis, bacterial cultures, transmission electron microscopy studies, virus isolation and PCR tests were used. Electron microscopic observation revealed pox virus particles having a size of about 200 nm×400 nm in the kidney. 548 and 180 bp fragments were amplified from organs of sick koi by PCR method using specific primers of carp edema virus (CEV). The fragments were sequenced and analysed. The results showed that they were shared 100% nucleotide identity with CEV-H504. All the results indicated that this disease was carp edema virus disease, caused by a kind of pox virus, CEV. This was the first report on the CEV of cultured koi in China.  相似文献   

16.
锦鲤疱疹病毒双重PCR检测方法的研究   总被引:1,自引:0,他引:1  
为了快速确诊锦鲤疱疹病毒(koi herpesvirus,KHV),本试验建立了KHV双重PCR检测方法。根据锦鲤疱疹病毒的SphⅠ-5基因和胸腺嘧啶脱氧核苷激酶(thymidine kinase,TK)基因设计特异性引物,优化反应条件,建立了KHV双重PCR检测方法。结果表明,建立的方法简单、灵敏、准确,一个反应体系可同时扩增292 bp和410 bp两个基因片段,可有效用于KHV的检测。  相似文献   

17.
利用PCR方法检测锦鲤疱疹病毒3个主要靶基因   总被引:1,自引:1,他引:0  
为建立锦鲤疱疹病毒(KHV)多靶基因PCR检测方法,本实验将KHV接种鲤鱼鳍条细胞,收获病变细胞悬液,提取DNA,根据GenBank中登录的KHV基因序列及出入境检验检疫行业标准推荐的基因(ORF7),设计合成3对特异性引物,针对胸苷激酶基因(TK)、聚合酶基因(Sph)和ORF7基因进行PCR检测.通过优化后的反应体系进行特异性、敏感性试验和样品检测.结果表明:3对引物能够分别特异性扩增出409bp、292 bp和484bp片段;敏感性试验表明对TK基因检测的敏感性高于Sph和ORF7基因,其最低检测量为1.9×106copies/μL;采用优化的3个PCR方法对8个有临床症状的样品进行检测,其中3份样品的3个基因PCR扩增结果均为阳性.因此,本研究选取的3个基因均可用于KHV的检测及确证实验.  相似文献   

18.
Cyprinid herpesvirus 3 (CyHV-3) disease is a significant threat for common and koi carp cultivators and for freshwater ecosystems. To determine the prevalence of CyHV-3 in Japanese rivers, a nationwide survey of all national class-A rivers was undertaken in the Summer of 2008. The virus was concentrated from river water samples using the cation-coated filter method. CyHV-3 DNA was detected in 90 rivers, representing 90% of 103 successfully analysed rivers. More than 100,000 copies of CyHV-3 DNA per litre of sample were detected in four rivers, higher than that reported during the Yura River outbreak in 2007. For CyHV-3-positive rivers, the log CyHV-3 density was negatively correlated with the water temperature on the sampling date and positively correlated with the suspended solids and dissolved oxygen, which are annually averaged for each river. Our results demonstrate that virus detection using molecular biology techniques is a powerful tool for monitoring the presence of CyHV-3 in natural environments.  相似文献   

19.
ABSTRACT: Cyprinid herpesvirus 3 (CyHV-3), also known as Koi herpesvirus, is the etiological agent of a mortal disease in common and koi carp. Recently, we investigated the entry of CyHV-3 in carp using bioluminescence imaging and a CyHV-3 recombinant strain expressing luciferase (LUC). We demonstrated that the skin is the major portal of entry after inoculation of carp by immersion in water containing CyHV-3. While this model of infection mimics some natural conditions in which infection takes place, other epidemiological conditions could favour entry of virus through the digestive tract. Here, we investigated whether ingestion of infectious materials mediates CyHV-3 entry through the digestive tract. Carp were fed with materials contaminated with the CyHV-3 LUC recombinant (oral contamination) or immersed in water containing the virus (contamination by immersion). Bioluminescence imaging analyses performed at different times post-infection led to the following observations: (i) the pharyngeal periodontal mucosa is the major portal of entry after oral contamination, while the skin is the major portal of entry after contamination by immersion. (ii) Both modes of inoculation led to the spreading of the infection to the various organs tested. However, the timing and the sequence in which some of the organs turned positive were different between the two modes of inoculation. Finally, we compared the disease induced by the two inoculation modes. They led to comparable clinical signs and mortality rate. The results of the present study suggest that, based on epidemiological conditions, CyHV-3 can enter carp either by skin or periodontal pharyngeal mucosal infection.  相似文献   

20.
Since the emergence of cyprinid herpesvirus 3 (CyHV-3), outbreaks have been devastating to Common Carp Cyprinus carpio and koi (a variant of Common Carp), leading to high economic losses. Current diagnostics for detecting CyHV-3 are limited in sensitivity and are further complicated by latency. Here we describe the detection of CyHV-3 by recombinase polymerase amplification (RPA). The RPA assay can detect as low as 10 copies of the CyHV-3 genome by an isothermal reaction and yields results in approximately 20 min. Using the RPA assay, the CyHV-3 genome can be detected in the total DNA of white blood cells isolated from koi latently infected with CyHV-3, while less than 10% of the latently infected koi can be detected by a real-time PCR assay in the total DNA of white blood cells. In addition, RPA products can be detected in a lateral flow device that is cheap and fast and can be used outside of the diagnostic lab. The RPA assay and lateral flow device provide for the rapid, sensitive, and specific amplification of CyHV-3 that with future modifications for field use and validation could lead to enhanced surveillance and early diagnosis of CyHV-3 in the laboratory and field.

Received September 14, 2015; accepted April 9, 2016 Published online August 2, 2016  相似文献   


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