共查询到19条相似文献，搜索用时 218 毫秒
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鸡传染性病毒性腺胃炎是以腺胃肿大、腺胃乳头出血溃疡为主要特征的传染病,该病多发生于雏鸡,主要表现为生长停滞和消瘦,剖捡可见特征性腺胃炎变化胸腺和法氏囊萎缩,胰腺坏死。本文就该病的流行病学,病理变化,临床症状,鉴别诊断及防治措施做了叙述,为养殖户有效诊断和防治鸡传染性腺胃炎提供参考。 相似文献
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鸡腺传支病是由病毒引起的鸡腺胃型传染支气管炎,是一种以腺胃病变为主要特征的新型疾病。也有人称之为鸡传染性腺胃病或鸡传染性病毒性腺胃炎。该病的发病机理不明确,所以很容易造成误诊、误治,给养殖户带来严重的经济损失。现介绍曾诊治的1例腺胃病,以此与大家共同学习。 相似文献
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腺胃炎由多种原因引起,是近几年常发的疾病,严重影响鸡的生产性能。病毒性腺胃炎是由多种因素共同作用导致的腺胃功能及结构发生改变。2007年世界禽病大会就该问题进行了广泛的讨论,病原一直没有确切的认定,但在所有发生腺胃炎的鸡群中都能分离出病毒,所以暂定名为病毒性腺胃炎。 相似文献
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Proventriculitis in broilers causes carcass condemnation when swollen proventriculi tear during evisceration. The cause of this proventriculitis is unknown, but several infectious agents have been associated with it. One such agent, infectious bursal disease virus (IBDV), has been implicated as a cause of proventriculitis, but a direct effect of this virus on the proventriculus has not been proven. The role of IBDV in proventriculitis may be indirect as a result of its ability to cause immunosuppression. The objective of this study was to understand how immunosuppression affects the incidence of proventriculitis in broiler chickens. Immunosuppression was induced in commercial and specific-pathogen-free broiler chickens using chemicals (cyclophosphamide and cyclosporin) or virus (IBDV). All groups were then exposed to a proventricular homogenate produced from diseased birds. At 7 and 14 days postinoculation, the incidence of proventriculitis in these groups was compared to that produced by homogenate exposure in immunocompetent broilers. All birds exposed to the proventricular homogenate from diseased birds developed proventriculitis. Cyclophosphamide and IBDV, both B cell suppressors, did not significantly affect the incidence or characteristics of the proventriculitis observed, although they did have an effect on the size of the proventriculus at 7 days postinoculation. Chickens immunosuppressed with cyclosporin, a T cell suppressor, developed more severe lesions and had a higher incidence of proventriculitis. These findings indicate that both B and T cells are involved in the immune response against proventriculitis, but cell-mediated immunity appears to have a more important role in controlling the disease. IBDV affects both humoral and cellular immunity in the chicken, so although under experimental conditions it didn't have a major effect on proventriculitis, it may explain why control of IBDV in the field seems to reduce the incidence of proventriculitis. 相似文献
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鸡传染性腺胃炎是以鸡生长阻滞、腺胃肿大、腺胃乳头出血和溃疡等为主要特征的传染病,多发于雏鸡,以蛋用雏鸡发病较多,近年来,肉鸡发病也有逐渐增多的趋势,给养鸡业带来严重的经济损失。鸡传染性腺胃炎病原复杂,病因众说纷纭,目前尚无定论。为使广大禽病研究者更快速的认识本病,本文就国内外对该病有关的主要病原学的研究进展进行综述。 相似文献
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鸡传染性腺胃炎病毒(暂定名)的致病性 总被引：8，自引：2，他引：6
用暂定为鸡传染性腺胃炎病毒（ＩＰＶ）的ＺＪ９７１株，经口服、腹腔、泄殖腔、口服－腹腔－泄殖腔联合不同途径接种于８日龄来航非免疫雏鸡，均可引起雏鸡发病；其中，以口服－腹腔－泄殖腔联合途径感染效果最佳，腹腔途径次之一。感染雏鸡生长阻滞、体重增长缓慢；剖析眼观病变主要以腺胃重量增加，腺胃指数增大，胸腺、法氏囊萎缩为特征；病理组织学变化主要以萎缩性胃炎、法氏囊炎、十二脂肠卡他性炎为特征。 相似文献
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马立克氏病病毒人工感染鸡细胞凋亡病变及凋亡机制研究 总被引：8，自引：1，他引：7
通过光镜、电镜观察以及免疫组织化学方法对马立克氏病病毒人工感染鸡的多种组织的实质细胞进行了细胞凋亡病变及凋亡机制研究。结果表明，马立克氏病病鸣肝、肾、心、脾、腺胃、卵巢、羽髓等组织、器官的实质细胞均出现明显的细胞凋亡病变。光镜观察．可见肝细胞、肾小管上皮细胞、腺胃腺上皮细胞、心肌纤维、脾脏内的淋巴细胞、卵巢内的颗粒膜细胞、羽髓细胞的细胞核裂解成大小不等的、致密浓染的球形团块。电镜观察，可见这些细胞的细胞核染色质经历凝集、边集、裂解，最后形成许多凋亡小体等不同阶段。免疫组化研究结果显示，上述细胞均有明显的FasL表达，FasL的表达表明细胞凋亡信号增强，细胞凋亡发生。 相似文献
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Bullimore SR Corfield AP Hicks SJ Goodall C Carrington SD 《Research in veterinary science》2001,70(2):149-155
In horses, ulceration of the non-glandular region of the stomach is common and has been attributed to the lack of a protective mucus covering. This study aimed to determine whether the non-glandular region is covered by a mucus layer. A mixture of antibodies raised against human gastric mucin (MUC 5 AC) showed a tissue distribution in the glandular region of the equine stomach similar to that seen in humans. Dot blots of mucus from the glandular and non-glandular regions showed cross-reactivity with these antibodies. Various histological fixation and processing techniques were compared for their ability to preserve mucus in the non-glandular region. Fixing frozen sections on-slide for 20 seconds in 20 per cent formalin/1 per cent cetylpyridinium chloride was considered the best method. In conclusion, the equine stomach expresses a gene homologous to human MUC 5 AC. Its product is expressed as a neutral mucin, which is present in the mucus that covers both the glandular and non-glandular regions. Future comparison of mucus composition in the healthy and ulcerated stomach will improve our understanding of gastric ulceration in the horse. 相似文献
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鸡传染性支气管炎病毒免疫机制和免疫预防研究进展 总被引：1，自引：0，他引：1
由鸡传染性支气管炎病毒（Infectious bronchitis virus,IBV）引起的鸡传染性支气管炎（Infectious bronchitis,IB）是高度传染的全球性鸡病之一,严重危害养鸡业。IBV众多的血清型及其基因组的不断变异,给IB的免疫防控带来很大的困难。IBV主要侵害鸡的呼吸系统、泌尿生殖系统和消化系统,病鸡出现呼吸困难、产蛋下降、肾炎和腺胃炎等症状和病变。IBV的特点是变异频繁,血清型复杂,所致疾病的临床表现差异很大。因此,IB已成为养禽业最难控制的疫病之一。鸡对IBV的免疫机制是国内外研究的热点之一。传统疫苗已不能完全保护免疫鸡群,开发IBV基因工程疫苗,从主要免疫原性蛋白的良好表达到免疫策略的不断完善,已成为未来预防IB的趋势。 相似文献