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猪附红细胞体是一种由于血液病原感染后引起的疾病,在感染后不仅能够引起猪的生长发育受阻等一系列症状,还能够引起猪死亡,给养殖场造成非常严重的经济损失,而且在发病后的诊断和防治方面存在一些困惑,导致疾病不断发生和流行,不能够被消灭。针对猪附红细胞体病进行深度剖析,通过对其病原、流行病学、临床症状、病理变化、诊断和防治方面进行归纳和总结,给广大养猪场提供一些技术上的参考,以减少猪发生此病,降低养殖风险。 相似文献
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<正>我国对鲟鱼疾病的研究起步较晚,1972年苏培义等开展了野生长江鲟鱼的调查,开启了我国鲟鱼疾病的研究序幕,此后鲟鱼的疾病不断被发现和报道,以细菌性疾病危害最为严重。目前,对鲟鱼细菌性病害的研究大多集中于病原的分离鉴定、病理损伤、临床诊断和药物敏感性测定等方面,细菌性疾病的发病机理、生态防治、综合防控技术等方面的关注还不够。 相似文献
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禽白血病是养鸡生产中常见病毒性肿瘤疾病之一,该病除引发感染鸡多种肿瘤性疾病外,还会引起鸡群免疫抑制、生长缓慢、蛋重减轻、产蛋量减少等多种亚临床症状,给养禽业带来巨大的经济损失。主要围绕禽白血病病原、流行病学、临床特征、病毒检测方法以及防治措施等方面对鸡白血病进行介绍,为该病的诊断及防控提供参考。 相似文献
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本文通过对红体病易感的南美白对虾、日本沼虾、斑节对虾和罗氏沼虾进行分析阐述,从病毒、细菌和环境因素等方面,总结了虾类红体病的病原和病理特征,归纳了相应的防治方法,以期为该病的进一步研究以及临床诊断和控制提供参考。 相似文献
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文章结合实际病例从病原传播规律,致病机理,症状特点,剖检变化,实验室诊断和防治的基本知识等方面论述了育成蛋鸡葡萄球菌病的防治要点,给出了加强预防和常规治疗的相关方案,为其它地区鸡场治疗该病提供参考。 相似文献
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引起鱼类鳃病的病原体主要包括以下几种:细菌、病毒、霉菌、原生动物、单殖吸虫和甲壳类。本文对这些疾病的症状作了描述,并提出了综合防治措施。 相似文献
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深入开展计算机在水产养殖方面的应用,是目前进行水产养殖自动化的主要内容之一,本文介绍了对虾疾病的诊断与防治的系统设计过程,它是经过多年的生产经验编制出来,既简单又实用,用户只需进行简单的数据输入便可对对虾进行诊治。 相似文献
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从某对虾育苗场2个育苗池中分别采集了发生摄食下降、活力降低及死亡率增高等症状的未知疾病的凡纳滨对虾(Litopenaeus vannamei)溞状幼体3期(Z3)和1期(Z1)的样品。用PCR检测白斑综合征病毒(WSSV)、传染性皮下及造血组织坏死病病毒(IHHNV)、急性肝胰腺坏死病副溶血弧菌(VpAHPND)、桃拉综合征病毒(TSV)、传染性肌坏死病毒(IMNV)、黄头病毒(YHV)、虾肝肠胞虫(EHP)、偷死野田村病毒(CMNV)和虾血细胞虹彩病毒(SHIV)等9种已知病原为阴性。组织病理学诊断观察到肝胰腺小管上皮细胞内存在不明褐色团块。使用2216E培养基对致病菌分离鉴定,得到2株溶藻弧菌(Vibrio alginolyticus),浸浴感染悉生卤虫(Artemia franciscana)幼体后的平均存活率分别为58%和83%。采用Illumina HiSeq高通量测序方法对这2个溞状幼体样品中细菌16S rRNA基因的2个高变区(V3~V4)进行总细菌菌群的测序,分析揭示了未知病因病虾中细菌菌群的多样性和相对丰度,门水平上2个样品的优势菌群均包括变形菌门(Proteobacteria)、拟杆菌门(Bacteroidetes)和厚壁菌门(Firmicutes),但相对丰度有显著差异;在属水平上相对丰度最高的均为弧菌属(Vibrio),在2个样品中的丰度分别为74.3%和60.5%,此外,Z1样品相对高丰度(21.9%)的属为黏着杆菌属(Tenacibaculum)。育苗管理信息及上述病例分析结果提示,该疾病可能是由于在过期存放的幼体饲料质量下降所致的营养障碍情况下,有一定致病性的溶藻弧菌条件性感染所引起的疾病。 相似文献
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Disruption of bacterial quorum sensing: an unexplored strategy to fight infections in aquaculture 总被引:1,自引:0,他引:1
Tom Defoirdt Nico Boon Peter Bossier Willy Verstraete 《Aquaculture (Amsterdam, Netherlands)》2004,240(1-4):69-88
Disease outbreaks—some of them caused by pathogenic bacteria—are considered to be one of the largest constraints to development of the aquaculture sector. So far, antibiotics and disinfectants have only had limited success in the prevention or cure of aquatic disease. Moreover, the frequent use of biocides, especially in subtherapeutic doses, is leading to the rapid development of resistance. Therefore, there is an urgent need to develop alternative ways to control infections caused by bacterial pathogens in aquaculture. Many of these pathogens are found to control virulence factor expression by a cell-to-cell communication system. Hence, disruption of bacterial quorum sensing has been proposed as a new anti-infective strategy and several techniques that could be used to disrupt quorum sensing have been investigated. These techniques comprise (1) the inhibition of signal molecule biosynthesis, (2) the application of quorum sensing antagonists (including natural occurring as well as synthetic halogenated furanones, antagonistic quorum sensing molecules and undefined exudates of higher plants and algae), (3) the chemical inactivation of quorum sensing signals by oxidised halogen antimicrobials, (4) signal molecule biodegradation by bacterial lactonases and by bacterial and eukaryotic acylases and (5) the application of quorum sensing agonists. The few reports that deal with disruption of quorum sensing of aquatic pathogens, together with the results obtained with human and plant pathogens, indicate that this new approach has potential in fighting infections in aquaculture. However, before this new strategy can be applied in aquaculture, the impact of quorum sensing disruption on the virulence of aquatic pathogens and the impact of the proposed quorum sensing disrupting techniques on the aquaculture system of interest should be studied in more depth. 相似文献
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White spot syndrome virus (WSSV) and infectious hypodermal and haematopoietic necrosis virus (IHHNV) are the major viral pathogens of penaeid shrimp worldwide (Lightner & Redman 1998). Litopenaeus vannamei was introduced into China from the Americas, and quickly became widely cultured. Following its introduction, both IHHNV and WSSV have become important pathogens of cultured penaeid shrimp and have had a huge impact on the culture industry in China in recent years. 相似文献