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1.
IMC10200株ALV-J实验诱发禽骨髓性白血病的研究   总被引:2,自引:0,他引:2  
对分离自肉种鸡群亚临床感染的J亚群禽白血病病毒IMC1o200株进行了实验感染诱发禽骨髓性白血病的病理学研究.IMC10200株J亚群禽白血病病毒尿囊腔接种11日龄肉鸡胚和SPF蛋鸡胚,孵出后跟踪观察.9周龄时随机抽检感染鸡,感染肉鸡特异引物PCR检测全部为阳性;组织病理学观察感染鸡无明显病变.至21周龄时感染肉鸡出现第一例典型骨髓性白血病病例;感染SPF蛋鸡未见明显J亚群禽白血病相关病变.  相似文献   

2.
本次诊断报告通过以下方法对一起肉仔鸡暴发急性J亚群禽白血病(avian leukemia,AL)进行了诊断:流行病学观察肩关节肿瘤结节,临床剖检肝脏、心肌和肠管及关节部位有肿瘤结节;病理切片镜检肝脏组织萎缩、心脏有发育均匀一致的髓样细胞瘤;用J亚群禽白血病抗体检测试剂盒检测15份血清样品,结果均为阳性;血清样品和泄殖腔棉拭子p27抗原检测,结果均为阳性;病死鸡内脏样品和关节液荧光PCR检测,结果禽白血病病毒(avian leukemia virus,ALV)核酸为阳性,普通PCR检测,结果为J亚群禽白血病阳性。综上所述,本次疫情确诊为急性J亚群禽白血病。为该病的临床诊断和防控提供有益的借鉴。  相似文献   

3.
本研究属世界上首次报道J亚群禽白血病病毒感染对蛋鸡产蛋性能的影响。尸体剖检观察到产蛋鸡的生殖系统发育不良,表现为卵巢、输卵管幼稚型,输卵管粗细不均。组织病理学观察,发现卵巢组织中有大量的胞浆内充满球形嗜酸性颗粒的骨髓瘤细胞。用特异性抗J亚群禽白血病病毒(ALV—J)囊膜糖蛋白gp85的单克隆抗体检测不产蛋鸡的卵巢、输卵管等待检的组织切片,均检出病毒阳性抗原。结果表明ALV—J的感染造成产蛋鸡卵巢、输卵管发育不良,是蛋鸡不产蛋的直接原因。  相似文献   

4.
崔治中 《动物保健》2010,(11):26-29
近两年来,全国各地蛋鸡场在开产后发生白血病/血管瘤的病例报告普遍显著上升,且在互联网上广泛流传。病毒分离鉴定表明,这二年在蛋鸡开产后发生的白血病/血管瘤主要是由J亚群禽白血病毒引起。实际上,J亚群禽白血病毒引发髓样细胞瘤早在上世纪90年代就随引种传入我国,先是给我国白羽肉鸡带来了很大的损失,又进一步传入我国地方品系三黄鸡和蛋用型鸡。  相似文献   

5.
间接荧光抗体法快速诊断海兰褐蛋鸡J亚群禽白血病的研究   总被引:19,自引:2,他引:17  
某地区海兰褐蛋鸡发生肿瘤性传染病,经临床症状和病理学检查,在肝、脾、肾、卵巢、输卵管、肺、骨髓、腺胃、肠道等可见胞浆内充满球形嗜酸性颗粒的骨髓瘤细胞,呈灶状或弥漫性的分布。该变化是禽骨髓细胞瘤病病理学的特征性变化,具有证病意义。经用特异性抗J亚群白血病病毒囊膜蛋白gp85的单克隆抗体的免疫组化方法,在病料组织切片上检出病毒抗原,从而确诊为蛋鸡J亚群禽白血病。本研究是尝试用间接荧光抗体法来快速诊断该病。采用特异性抗J亚群禽白血病病毒囊膜蛋白gp85单克隆对组织触片作间接荧光抗体试验,检测J亚群禽白血病病毒抗原。在骨髓、食管、肌肉、输卵管、肾都出现了范围广而且很明亮的荧光;肝、肺、脾的荥光较为明亮;心脏的荧光较弱,但清晰可见。表明在病料组织中存在特异性病毒抗原。  相似文献   

6.
安徽省鸡J亚群禽白血病血清学调查   总被引:2,自引:0,他引:2  
J亚群禽白血病(AL-J)是由J亚群禽白血病病毒(ALV-J)引起的以骨髓细胞瘤为特征的鸡的种源性传染病.该病最早由Payne等从英国的白羽肉鸡中发现,很快传遍全世界几乎所有的白羽肉用型鸡群.我国由于引种将本病带入,1999年杜岩等首次报道从我国的商品肉鸡中检出ALV-J感染.随后ALV-J在全国各地发生的报道日渐增多,不但是肉用型鸡,蛋用型鸡发生ALV-J的案例也在急剧增加,说明ALV-J在传播流行过程中也在发生着一定的变化.  相似文献   

7.
2004年8月,山东某蛋种鸡场,饲养蛋种鸡5000余只,于开产前发病,死亡率约20%,送我化验室5只进行剖检,我们发现该鸡群流行一种以肝、脾肿大为主要特征的疫病,经病理学诊断为J亚群禽白血病。现报告如下。  相似文献   

8.
应用组织芯片免疫组化法检测ALV-J   总被引:4,自引:0,他引:4  
禽白血病J亚群(ALV-J)是英国的Payne和他的同事们在20世纪90年代初从肉鸡中分离出来的新亚群,主要引起肉鸡的骨髓瘤白血病。自1999年,我国一些肉用型种鸡场陆续发生了禽白血病J亚群。并且近几年来,ALV-J已从最初只引起肉种鸡发病开始向蛋鸡及中国地方种鸡蔓延。组织芯片技术是一种新型特殊的生物芯片技术,它能明显提高工作效率,减少实验误差。本研究将组织芯片技术和免疫组化染色结合起来,用特异性抗ALV-J囊膜蛋白gp85的单克隆抗体来检测发病鸡只的各组织器官的组织切片。在肝脏、脾脏、肾脏、卵巢、腺胃、骨髓、髓细胞瘤组织均检出病毒阳性抗原。结果表明组织芯片技术和免疫组化染色相结合为临床诊断ALV-J提供了一个高通量、敏感的检测方法。  相似文献   

9.
禽白血病病毒(avian leukosis virus, ALV)是一种能引起禽类多种类型肿瘤的反转录病毒,包括A-J等10个亚群。其中J亚群禽白血病病毒(Subgroup J of avian leukosis virus, ALV-J)是20世纪80年代末Payne等首先从肉鸡中分离鉴定出来的亚群。自1999年我国首次分离ALV-J以来,ALV-J已从肉用鸡群向蛋用型鸡群和地方品系鸡群传播。本文对我国鸡群J亚群白血病流行的过去、现在和将来及其防控作以简要介绍,以期对我国动物疫病防控产生新的启示。  相似文献   

10.
祖代肉用鸡群禽白血病病毒感染的实验室诊断   总被引:5,自引:0,他引:5  
对疑似J亚群禽白血病病毒(ALV-J)感染的祖代肉用型种鸡群进行病原微生物学的实验室诊断。组织病理学检测结果表明,病鸡脾、肾病理组织切片上有大量增生的髓细胞,呈典型的髓细胞瘤病理显微变化。肾组织触片和组织切片用抗ALV-J特异性单克隆抗体G2进行间接免疫荧光反应(IFA)检测,结果呈阳性。病料接种鸡胚成纤维细胞(CEF)盲传3代后,分离到1株病毒(JS-Nt),经鉴定为ALV-J。这些结果证明该鸡群存在ALV-J的感染。  相似文献   

11.
Infection of broiler chickens with subgroup J avian leukosis virus (ALV) results in the induction of myeloid tumors. However, although egg-type chickens are susceptible to infection with ALV-J, the tumor incidence is very low, and on rare occasions the tumors observed are of the myeloid lineage. We recently described the isolation of an ALV (AF115-4) from commercial egg-type chickens suffering from myeloid leukosis. AF115-4 was initially identified as an ALV-J isolate based on PCR analysis of the long terminal repeat (LTR). However, further characterization of the viral envelope indicated that the virus is recombinant with subgroups B envelope and J LTR. Here we further characterize this recombinant virus at both the molecular and biological levels. We show that the AF115-4 isolate expresses a recombinant envelope glycoprotein encoded by a subgroup B gp85 region and a subgroup E gp37 region. The host range ofAF115-4 was analyzed using cells resistant to infection by subgroups A/B, J, or E; this shows that no ALV-J was present in the isolates obtained from the affected chickens. Additional antigenic characterization of AF115-4 using chicken sera specific for subgroups B or J indicated that no ALV-J was present in the samples examined. Inoculation of AF 115-4 into ALV-susceptible 1515 X 71 chickens resulted in the induction of lymphoid leukosis but not the expected myeloid leukosis affecting the commercial chickens. These results suggest that differences in the genetic makeup of the chickens from which AF115-4 was isolated and the line 1515 X 71 used in the present experiments may be responsible for the observed differences in pathogenicity. In addition, the results suggest that ALV-J continues to evolve by recombination, generating new viruses with different pathological properties.  相似文献   

12.
从山东省某海兰褐鸡场祖代、父母代种鸡和商品代蛋鸡中获得疑似血管瘤型禽白血病(Avian leukosis,AL)病料.采用病理剖检、IFA、分子生物学检测,确定为J亚群禽白血病.从祖代、父母代病料中各分离到1株J亚群禽白血病病毒(J subgroup of avian leukosis virus,ALV-J),从商品代蛋鸡中分离到4株ALV-J.根据原型毒株HPRS103设计1对gp85基因引物,获得gp85基因序列.获得的gp85基因序列与各亚群参考毒株序列核苷酸同源性比对,结果显示:分离自商品代蛋鸡的Commercial03株、Commercial04株、Commercial06株和父母代分离株Parent02株位于同一分支,同源性在97.2%~97.9%,与HPRS103株同源性94.7%~95.2%;Commercial05株与祖代分离株Grandparent01株在同一分支,与HPRS103株同源性为98.3%,4株分离自商品代的ALV-J同源性为95.0%~99.9%.表明商品代蛋鸡中的ALV-J可能来自父母代或祖代种鸡的垂直传播,也可能来自于其他来源的水平传播.从同一鸡场祖代、父母代及商品代鸡中分离得到ALV-J,这在我国还是首次.对后续研究其基因突变、致瘤机制等奠定了良好的基础.  相似文献   

13.
In Experiment 1, a monoclonal antibody against the envelope glycoprotein (gp85) of subgroup J avian leukosis virus (ALV-J) was used to study the distribution of ALV-J in various tissues of White Leghorn chickens inoculated as embryos with the strain ADOL-Hcl of ALV-J. At 2 and 6 wk of age, various tissues from infected and control uninfected chickens were tested for the presence of ALV-J gp85 by immunohistochemistry. In Experiment 2, using the methyl green-pyronine (MGP) stain, sections of bursa of Fabricius (BF) from chickens of line 15I5 x 7(1), inoculated with ALV-J or Rous-associated virus-1 (RAV-1), a subgroup A ALV, at hatch were examined for transformation of bursal follicles at 4 and 10 wk of age. In Experiment 1, specific staining indicative of the presence of ALV-J gp85 was noted at both 2 and 6 wk of age in the adrenal gland, bursa, gonads, heart, kidney, liver, bone marrow, nerve, pancreas, proventriculus, spleen, and thymus. In Experiment 2, by 10 wk of age, transformed bursal follicles were detected in MGP-stained sections of BF in only one of five (20%) chickens inoculated with ALV-J at hatch, compared with five of five (100%) chickens inoculated with RAV-1. The data demonstrate distribution of ALV-J gp85 in various tissues of White Leghorn chickens experimentally inoculated as embryos with the virus. The data also confirm our previous observation that ALV-J is capable of inducing transformation of bursal follicles, albeit the incidence is less frequent than that induced by subgroup A ALV.  相似文献   

14.
Avian leukosis virus subgroup J poses a great threat to the poultry industry in China. To reduce the economic losses, a quick method for detection of ALV-J antigen is required for diagnosis and identification of the congenitally transmitting hens. In this study, we report the production and evaluation of one monoclonal antibody (MAb) suitable for achieving these goals. The gp85 gene of avian leukosis virus subgroup J CAUHM01 China isolates was subcloned into the expression vectors pGEX-6p-1 and pET28a and successfully expressed in E. coli. After immunizing BALB/c mice with recombinant His-Jgp85 protein, splenic cells from immunized mice were fused with SP2/0 myeloma cells to produce hybridomas. We isolated and characterized one ALV-J gp85-specific MAb by determining its titer, affinity and IgG subclass. In addition, we performed epitope mapping and determined the epitope for the MAb 1E3 to be 81-92 aa of ALV-J gp85 protein (LPWDPQELDILG). Bioinformatics analysis and IFA studies revealed that this epitope is conserved among all ALV-J isolates and that this antibody could serve as a useful reagent for ALV-J detection and diagnosis.  相似文献   

15.
The tissue tropism of avian leukosis virus (ALV) subgroup J (ALV-J) was investigated in congenitally infected broiler chickens by an immunohistochemistry technique detecting gp85 viral glycoprotein. All organs examined contained detectable antigen. The most intense staining was in the adrenal gland, heart, kidney, and proventriculus. Intense staining for viral antigen in the heart may explain the ability of ALVs to cause cardiomyopathy. Although recent investigations failed to demonstrate specific viral staining in bone marrow from infected chickens, we were able to show moderate staining in myelocytic precursor cells in bone marrow. This finding agrees with previous work showing cell cultures of bone marrow are susceptible to ALV-J infection and the tendency of subgroup J to predominantly induce myeloid rather than lymphoid neoplasms.  相似文献   

16.
从安徽省的黄羽肉鸡和罗曼蛋鸡中各分离鉴定出1株J亚群禽白血病病毒,克隆获得了2条相应的gp85基因序列,并与参考毒株进行序列比对。结果表明,两分离毒株与J亚群参考毒株同源性为82.1%~99.4%,分离毒株之间同源性为85.4%。其中肉鸡分离毒株与J亚群原型毒株HPRS-103同源性为97.1%,与J亚群国内毒株SD09TA04、SDYC02J同源性均为99.4%;蛋鸡分离毒株与HPRS-103的同源性为89.0%,与SD09TA04和SDYC02J同源性仅为88.6%。两分离毒株的gp85氨基酸序列出现突变和缺失,在高变区hr1、hr2变异明显。进化分析进一步表明,2个分离毒株亲缘关系较远,可能来源于不同的原始病毒株。  相似文献   

17.
2007年7月山东某蛋鸡场150日龄海兰褐蛋鸡发病,前期经病理学和免疫组织化学检测证明和ALV—J密切相关。取4只病鸡的肝组织处理后接种鸡胚成纤维细胞(CEF)培养,用ALV—J单抗G2-3进行间接免疫荧光检测,结果呈现强阳性,将反应为阳性的4株病毒分别命名为WS0701、WS0702、WS0703和WS0704;根据ALV-J原型株HPRS-103的序列设计1对针对外源性ALV—J的引物P1和P2,提取阳性CEF基因组DNA作为模板,PCR扩增后,得到长度为924bp的片段;PCR扩增产物测序结果显示,与HPRS-103的同源性为95.0%~97.5%,与国内分离株的同源性为92.0%~95.9%;遗传变异分析结果表明成髓细胞瘤型、血管瘤型ALV-J与国内毒株的同源性较远,而与HPRS-103的同源性最近,这说明ALV—J在蛋鸡体内复制的过程中有返祖现象,并呈现了新的肿瘤学特征。  相似文献   

18.
表现腺胃炎的蛋用型鸡J亚群-白血病病毒的分离与鉴定   总被引:2,自引:1,他引:1  
从表现腺胃炎的尼克珊瑚粉商品代蛋鸡中分离到J亚群-白血病病毒(ALV-J)。将病料或鸡白细胞接种于CEF,培养12 d,分别采用单克隆抗体间接免疫荧光试验检测,结果10只鸡中有9只鸡分离到ALV-J,其中有4只鸡还存在与禽网状内皮增生病病毒(REV)的共感染。通过PCR扩增gp85基因,与已发表的20株ALV-J进行同源性比较。结果表明,与来自白羽肉鸡的HPRS103的同源性为97.8%,而与来自蛋用型鸡的SD07LK1株的同源性为93.0%。本研究发现,在某些仅仅发生腺胃炎的鸡也可能普遍存在ALV-J感染,再次显示了腺胃炎病料中病毒感染的多样性。ALV-J可能成为致腺胃炎的病原之一,但其致病作用有待进一步研究。  相似文献   

19.
J亚群禽白血病病毒(ALV-J)ELISA检测方法的建立   总被引:2,自引:0,他引:2  
利用抗J亚群禽白血病病毒(ALV—J)囊膜蛋白特异性单克隆抗体JE9,建立了检测ALV—J env抗原抗体免疫复合物的ELISA方法。应用该方法检测SPF鸡血清、鸡抗禽流感H9亚型阳性血清、鸡沙门氏菌阳性血清、鸡腺病毒阳性血清、鸡新城疫阳性血清.结果均为阴性,无交叉反应;抗ALV—J阳性血清与ALV—J特异性单克隆抗体JE9能相互阻断;ALV—J阳性血清经酸处理后,ELISA检测的D490差值明显下降。对部分攻毒鸡血清样本及田间ALV—J阳性血清样本进行电镜观察,可见ALV—J样病毒粒子及ALV—J样免疫复合物。经与间接免疫荧光(IFA)检测ALV—J env抗体结果比较表明,建立的ELISA方法与IFA方法两者具有较好的群体符合率,群体符合率为8/9。这些结果表明,本研究建立的ELISA方法在ALV—J的诊断中具有很好的应用前景。  相似文献   

20.
A Qin  L F Lee  A Fadly  H Hunt  Z Cui 《Avian diseases》2001,45(4):938-945
In an attempt to develop a specific diagnostic test for avian leukosis virus (ALV) subgroup J (ALV-J) strain Hc1, four monoclonal antibodies (MAbs), JE9, G2, 145, and J47, were generated that are specific for ALV-J envelope glycoprotein, gp85. Polymerase chain reaction (PCR) was used to amplify genomic pro-viral DNA of Avian Disease and Oncology Laboratory (ADOL)-Hc1 and ADOL-4817 envelope genes. Both open reading frames encoding glycoproteins gp85 and gp37 were cloned into baculoviruses. Abundant expression of gp85 and gp37 was detected in the recombinant viruses with specific antibody to Hc1 strain of the ALV-J. The expressed proteins were used for immunization of mice to produce hybridoma cell lines secreting MAbs specific to ALV-J envelope protein. A panel of MAbs was generated by fusing NS1 myeloma cells and spleen cells from mice immunized with the recombinant baculoviruses. With the use of an immunofluorescence assay, three MAbs (JE9, G2, 145) reacted with ALV-J but not with subgroups A, B, C, D, or E of ALV. MAb J47 reacted with all exogenous subgroups of ALV including A, B, C, D, and J but not with endogenous subgroup E viruses. Western blot analysis was performed with all four MAbs against recombinant baculovirus and Hc1-infected chicken embryo fibroblast (CEF) lysates. A major band with a molecular weight about 90 kD corresponding to the size of ALV-J envelope was consistently obtained. With these MAbs, we detected the Hc1 antigen in CEFs infected with several ALV-J viruses isolated in the United States and also in tissue sections from chickens infected with Hc1 strain of ALV-J. These MAbs will be useful reagents for the diagnosis of ALV-J infection because they recognize a common antigenic epitope in six isolates tested thus far.  相似文献   

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