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1.
鸡传染性法氏囊病（ＩＢＤ）是由传染性法氏囊病病毒（ＩＢＤＶ）引起的一种以破坏鸡免疫中枢器官———法氏囊为主要特征的急性、高度接触性传染病。１ＩＢＤ流行新特点１１发病日龄提前或推后最初ＩＢＤ爆发时主要发生在２—１５周龄的鸡，而目前发病早的有３日龄的幼雏，晚的１８０日龄成年鸡仍发病。１２症状不典型、易反复目前很多病例死亡较少，病程却较长，法氏囊变化不明显，肾脏肿大。发病易反复，同一鸡群能发生２—３次。１３变异毒株的出现目前已分离出许多ＩＢＤＶ的变异毒株。某些地区由于变异株的存在，用ＩＢＤ疫苗后… 相似文献
2.
本实难采用沈阳地区自然发病鸡群的ＩＢＤＶ分离毒株，接种非免疫易感鸡进行ＩＢＤＶ增殖，铕收集发病鸡的法氏囊组织用于研制油乳剂组织灭能苗。用该疫苗接种１０日龄左右的雏鸡，观察免疫效果。 相似文献
3.
防制鸡ＩＢＤ发生的几点体会＠林云圣￥北京市西郊种鸡场防制鸡ＩＢＤ发生的几点体会林云圣（北京市西郊种鸡场北京１０２２０６）鸡传染性法氏囊病（ＩＢＤ）是一种由病毒引起的以侵害鸡中枢免疫器官法氏囊为特征的急性或亚急性接触性传染病。３～６周龄雏鸡多发,４周龄最易感... 相似文献
4.
四群经鸡传染性法氏囊病（ＩＢＤ）弱毒疫苗免疫的鸡群，在爆发ＩＢＤ期间，采集有肉眼病变的法氏囊组织，匀浆后攻击ＩＢＤ易感鸡。结果表明ＮＨ９１４为ＩＢＤＶ强毒。ＨＮ９１４以鸡胚和细胞上传了４代，将鸡胚２代毒回归易感伊莎鸡，可引起发病和死亡。 相似文献
5.
应用鸡胚法氏囊原代细胞培养鸡IBDV的研究 总被引：3，自引：0，他引：3
试用鸡胚法氏囊奈代细胞传代，增殖鸡传染性法氏囊病病毒（ＩＢＤＶ），均不同程度地产生特征性细胞病变效应，采用双抗体夹心法ＥＬＩＳＡ和细胞毒回归鸡试验证实，ＩＢＤＶＨ株组织感毒适应于鸡胚法氏囊细胞，并随传代次数增加，病毒增殖能力增强，而在鸡胚成纤维细胞上盲传２代之后才开始出现细胞病变效应，比较了ＩＢＤＶ在鸡胚法氏囊细胞和鸡胚成纤维细胞上增殖能力的差异，讨论了培养基ＰＨ值，小牛血清浓度对鸡胚法氏囊细胞培 相似文献
6.
传染性法氏囊病病毒抗原和毒力变异的分子基础 总被引：4，自引：0，他引：4
传染性法氏囊病病毒（ＩＢＤＶ）是目前危害世界养鸡业的重要病原之一，除引起３～６周龄易感鸡直接发病死亡外，可致雏鸡免疫抑制，导致鸡群对新城疫、马立克氏病及传染性支气管炎等多种重要疫病免疫失败，故已引起世界禽病工作者的高度重视。ＩＢＤＶ属双ＲＮＡ病毒科禽... 相似文献
7.
传染性法氏囊病毒分子生物学研究进展 总被引：3，自引：0，他引：3
传染性法氏囊病病毒（Ｉｎｆｅｃｔｉｏｕｓｂｕｒｓａｌ ｄｉｓｅａｓｅ ｖｉｒｕｓ , ＩＢＤＶ）是鸡的重要传染病病原之一,除了直接引起３周龄～６周龄易感鸡发病死亡外,更为重要的是破坏机体的免疫器官,引起免疫抑制,导致鸡群丧失对其它病原的免疫力,给世界养鸡业造成巨大的经济损失。本文主要从病毒的特性、基因组结构和病毒蛋白及变异几方面对ＩＢＤＶ研究进展进行浅述。１主要特性１.１分类由于ＩＢＤＶ在鸡胚肾细胞上培养出现的细胞病变、对某些理化因素的抵抗力及电镜下形态同呼肠孤病毒（ＲＨ）Ｖ相似,所以一开始被误… 相似文献
8.
用单抗介导的荧光抗体技术检测鸡尿囊细胞内传染性支气管炎病毒的研究 总被引：2，自引：0，他引：2
用传染性支气管炎病毒（ＩＢＶ）Ｈ１２０、Ｈ５２、Ｍ４１、ＡＲＫ、澳大利亚Ｔ株、野外分离株ＲＳ、ＲＹ及鸡新城疫病毒（ＮＤＶ）、鸡传染性法氏囊病毒（ＩＢＤＶ），鸡传染性喉气管炎病毒（ＩＬＴＶ）、减蛋综合症病毒（ＥＤＳＶ）等分别接种９日龄ＳＰＦ鸡胚，３７℃孵育４８小时后，将其尿囊液离心，沉淀用ＰＢＳ悬浮，涂片，用抗ＩＢＶ单抗ＭＣ作一抗、进行间接荧光抗体检测。结果：Ｈ１２Ｏ、Ｈ５２、Ｍ４１“ＡＲＫ、Ｔ株及ＲＳ、ＲＹ均显阳性，而ＮＤＶ、ＩＢＤＶ、ＩＬＴＶ、ＥＤＳＶ均为阴性。结果表明、用此法检测鸡胚尿囊液中ＩＢＶ．具有快速、敏感、特异的优点。 相似文献
9.
鸡传染性法氏囊病 (ＩＢＤ)是鸡的一种急性高度接触性传染病 ,其病原为鸡传染性法氏囊病病毒 (ＩＢＤＶ)。ＩＢＤＶ主要侵害鸡的体液免疫中枢器官———法氏囊 ,导致免疫抑制 ,从而降低机体对其他传染病的免疫反应。鸡群早期感染ＩＢＤ以后 ,对其他病毒病和细菌病的易感性增高 ,同时影响新城疫、马立克氏病等的免疫效果。ＩＢＤＶ的某些毒株能使 3周龄以上的鸡发病 ,其死亡率可高达 1 0 0 % ,而且ＩＢＤＶ变异株和超强毒株的出现 ,也使ＩＢＤ本身免疫经常失败。因此本病已成为世界上最严重的传染病之一。ＩＢＤＶ无囊膜 ,属双股双链ＲＮＡ病… 相似文献
10.
鸡传染性法氏囊病病毒的病原性概述张存，范坤晓，陈如玉，刘蔓雯（浙江农科院畜牧兽医研究所３１００２１）鸡传染性法氏囊病（ＩＢＤ）发病率和死亡率及免疫抑制程度与鸡的品种、日龄和病毒株的病原性密切相关。ＩＢＤ病毒株间病原性差异很大，有的毒株可致易感鸡１００... 相似文献
11.
雏鸡感染传染性法氏囊病病毒时血细胞动态变化 总被引：1，自引：0，他引：1
研究了感染ＩＢＤＶ免疫和未免疫３０～５９日龄ＡＡ雏鸡的外周血细胞动态变化。结果表明：ＩＢＤＶ对红细胞数（ＲＢＣ）影响各组差异不显著,均随日龄增长呈上升趋势;从以ＩＢＤＶ攻毒前１ｄ到攻毒后的头５ｄ,３组鸡的白细胞数（ＷＢＣ）均呈上升趋势,未免疫未攻毒鸡（Ｃ组）随后下降,而未免疫攻毒鸡（Ａ组）和免疫攻毒鸡（Ｂ组）则持续上升至攻毒后第７ｄ,然后下降;Ａ组在ＩＢＤＶ攻毒后,白细胞分类计数（ＤＣ）中的单核细胞和异嗜性粒细胞急剧增加,淋巴细胞第１ｄ虽有减少但随后上升,嗜碱性粒细胞和嗜酸性粒细胞第７ｄ出现峰值,以后下降。方差分析显示,Ａ组ＷＢＣ和ＤＣ均高于或显著高于Ｂ组和Ｃ组,Ｂ、Ｃ两组比较,差异不明显。 相似文献
12.
Single and combined infections of specific-pathogen-free chickens with infectious bursal disease virus and an intestinal isolate of reovirus 总被引：2，自引：0，他引：2
The susceptibility of 1-day-old and 7-day-old specific-pathogen-free chickens to infection with a virulent strain of infectious bursal disease virus (IBDV) or an intestinal isolate of avian reovirus, or a combination of the two, was investigated. Chickens infected with IBDV and reovirus had more severe pathological lesions than chickens infected with either virus alone, and prior infection with IBDV enhanced the pathogenicity of enteric reovirus. Virus recovery was attempted from bursa, spleen, thymus, liver, intestine, pancreas, cecal tonsils, heart, and tarso-metatarsal tendons. Viruses were recovered from all tissues sampled for either IBDV or reovirus isolation, and indications were that infection with IBDV before infection with reovirus led to longer persistence of reovirus in some tissues. Antibodies to IBDV or reovirus were measured by the virus neutralization test and enzyme-linked immunosorbent assay. Chickens infected with IBDV had lower (P less than 0.05) antibody responses to reovirus than chickens infected with reovirus alone. 相似文献
13.
Setiyono A Hayashi T Yamaguchi T Fukushi H Hirai K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(2):219-221
To detect the molecules that interact with infectious bursal disease virus (IBDV), the chicken B lymphoblastoid cell line, LSCC-BK3, which is permissive for virulent IBDV infection was investigated. The sodium dodecyl sulfate-solubilized plasma membrane fraction from the cells was subjected to a virus overlay protein binding assay. The IBDV specifically bound to proteins in LSCC-BK3 plasma membranes with molecular weights of 70, 82 and 110 kDa. This is the first report to demonstrate cellular molecules that interact with virulent IBDV. 相似文献
14.
传染性法氏囊病病毒感染细胞内源性microRNA表达差异分析 总被引：1，自引：0，他引：1
细胞内源性microRNA（miRNA）在宿主与病原相互作用过程中发挥着重要的调节功能。为了分析细胞内源性miRNA与传染性法氏囊病病毒（IBDV）的相互作用,用IBDV弱毒和强毒分别感染鸡胚成纤维细胞（CEF）和SPF鸡,24h后,取感染CEF和法氏囊组织,提取细胞总RNA,用Hy3/Hy5双色荧光标记,与miRNA芯片杂交,进行芯片内标准化、芯片间标准化、表达差异比较以及聚类分析。结果显示：在IBDV弱毒感染的CEF中,有17个细胞内源性miRNA表达上调,17个miRNA表达下调;在IBDV强毒感染的鸡法氏囊组织细胞中,有30个细胞内源性miRNA表达上调,18个miRNA表达下调。根据表达差异显著的miRNA序列设计引物,用荧光定量RT-PCR方法验证芯片检测结果,2种方法的检测结果一致。结果表明,IBDV感染可诱导细胞内源性miRNA表达变化,这些上调或下调的miRNA能调控细胞内多种代谢和信号传导途径发生异常,引起细胞及组织器官发生病理学变化。 相似文献
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16.
Organ culture of chicken bursa as a model to study the pathogenicity of infectious bursal disease virus isolates. 总被引：1，自引：0，他引：1
In vitro study with chicken bursal organ culture was attempted to assess the pathogenicity of locally isolated infectious bursal disease virus (IBDV) initially isolated from the bursa of naturally infected birds. In bursal organ culture, lymphoblastic transformation was noticed as early as 24 hr postinoculation and reached maximum at 72 hr postinoculation. The other microscopic changes were increased number of macrophages and formation of plasma cells. The IBDV antigen was detected 24 hr onward by coagglutination test with antibody coated Staphylococcus aureus strain Cowan I. On the basis of lesion score, the three isolates of IBDV (A, B, and C) were graded as virulent (B isolate) and moderately virulent (A and C isolates). A similar pattern of pathogenicity was also observed in the in vivo pathogenicity studies in chicken based on bursa: body weight ratio and histopathologic lesion score. The bursal organ culture thus provides a useful experimental model to differentiate the IBDV isolates on the basis of their virulence. 相似文献
17.
鸡传染性法氏囊病病毒地方流行毒株的免疫原性 总被引：1，自引：0，他引：1
从河北省一些发病鸡场分离到JD1～JD10共10株鸡传染性法氏囊病病毒(IBDV)毒株,用IBD标准阳性血清以琼扩试验进行了初步鉴定.并进行了IBDV分离物及其鸡胚适应毒免疫原对标准强毒IBDV-BC6/85株免疫保护试验,D78弱毒疫苗对IBDV各分离毒株的免疫保护试验以及分离毒株间交互免疫保护试验.结果表明,D78疫苗对JD2,JD5和JD10 IBDV分离株的保护率较低,分别为40%、50%和60%.分离毒株JD5、JD2及其鸡胚传代物E-JD2对强毒株的免疫保护率可达100%.交互免疫保护试验表明,JD2对其余各分离株的免疫保护指数达到80%以上,对标准强毒株和地方分离株均可产生有效免疫保护. 相似文献
18.
2株鸡传染性法氏囊病病毒超强毒株的分离鉴定 总被引：3，自引：0，他引：3
用分离的疑为鸡传染性法氏囊病病毒 (IBDV)超强毒株 (vv IBDV) He B- lf和 He B- bd接种 SPF鸡 ,36 h后接种鸡开始发病 ,发病率为 10 0 %,死亡率为 5 0 %以上。剖检可见与野外病例相同的病理变化 ,如肌肉、心脏、腺胃出血 ,法氏囊水肿或呈“紫葡萄”样外观。经血清学试验、毒力试验、鸡胚接种试验、分子生物学和电镜形态学观察均证明该两分离物为超强毒株 ,从而证明河北省鸡群中存在不同于经典 IBDV的超强毒株。 相似文献
19.
Jeong Ho Park Haan Woo Sung Byung Il Yoon Hyuk Moo Kwon 《Journal of veterinary science (Suw?n-si, Korea)》2009,10(2):131-139
The aim of this study was to examine the efficacy of in ovo prime-boost vaccination against infectious bursal disease virus (IBDV) using a DNA vaccine to prime in ovo followed by a killed-vaccine boost post hatching. In addition, the adjuvant effects of plasmid-encoded chicken interleukin-2 and chicken interferon-γ were tested in conjunction with the vaccine. A plasmid DNA vaccine (pcDNA-VP243) encoding the VP2, VP4, and VP3 proteins of the very virulent IBDV (vvIBDV) SH/92 strain was injected into the amniotic sac alone or in combination with a plasmid encoding chicken IL-2 (ChIL-2) or chicken IFN-γ (ChIFN-γ) at embryonation day 18, followed by an intramuscular injection of a commercial killed IBD vaccine at 1 week of age. The chickens were orally challenged with the vvIBDV SH/92 strain at 3 weeks of age and observed for 10 days. In ovo DNA immunization followed by a killed-vaccine boost provided significantly better immunity than the other options. No mortality was observed in this group after a challenge with the vvIBDV. The prime-boost strategy was moderately effective against bursal damage, which was measured by the bursa weight/body weight ratio, the presence of IBDV RNA, and the bursal lesion score. In ovo DNA vaccination with no boost did not provide sufficient immunity, and the addition of ChIL-2 or ChIFN-γ did not enhance protective immunity. In the ConA-induced lymphocyte proliferation assay of peripheral blood lymphocyte collected 10 days post-challenge, there was greater proliferation responses in the DNA vaccine plus boost and DNA vaccine with ChIL-2 plus boost groups compared to the other groups. These findings suggest that priming with DNA vaccine and boosting with killed vaccine is an effective strategy for protecting chickens against vvIBDV. 相似文献