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本文介绍了几种弓形虫诊断方法,包括染色试验、间接血凝试验、改良凝集试验、间接免疫荧光抗体染色试验、酶联免疫吸附试验、免疫胶体金技术和干扰素释放反应。在使用活的、有毒力的速殖子情况下,染色试验(DT)仍然是特异性、敏感性和重复性良好的弓形虫病检测手段;间接血凝试验(IHA)特异性不高,但由于其具有简便快速的特点,经常应用于流行病学调查;改良凝集试验(MAT)也可以用于流行病学调查,且因其特异和敏感性高,目前仍然是检测弓形虫病的金标准;亲和力ELISA省时省力,对于鉴定弓形虫急慢性感染有较高的应用价值;免疫胶体金技术(GICT)适用于弓形虫病早期检测和诊断,适合在基层推广应用;干扰素释放反应(IGRA)目前主要应用于人的弓形虫检验,在动物的检测中有待进一步发展。 相似文献
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弓形虫病免疫学诊断方法研究进展 总被引：7，自引：0，他引：7
弓形虫病是一种分布广泛、危害严重的人兽共患病,不但在公共卫生上有很重要的意义,而且对畜牧业也造成巨大经济损失.为了寻找敏感、特异、快速的弓形虫病诊断方法,国内外学者在弓形虫病诊断方面进行了大量研究.目前,弓形虫病调查、诊断的方法有病原学方法、免疫学方法、分子生物学方法,但免疫学方法仍是进行弓形虫感染调查、弓形虫病诊断的常用方法.检测抗弓形虫抗体或循环抗原的免疫学诊断方法主要有染色试验(DT)、凝集试验(AT)、酶联免疫吸附试验(ELISA)、免疫胶体金技术等.文章就该病的免疫学诊断方法的研究进展加以概述. 相似文献
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《中国动物传染病学报》2017,(5)
为了研制一种可用于检测弓形虫的快速诊断胶体金免疫层析试纸条,本研究对弓形虫表面抗原(surface antigen,SAG)SAG1和SAG2的基因片段进行重构合成,与PET-28a(+)载体连接后,转化至大肠杆菌BL21(DE3)中表达,利用His亲和层析柱对融合蛋白进行纯化,获得SAG重组表位抗原,Western blot对重组蛋白免疫原性进行分析。用r SAG重组蛋白及r SPG分别划线,作为检测线和质控线,制作胶体金免疫层析试纸条,利用小鼠弓形虫阳性血清及小鼠阴性血清检验胶体金免疫层析试纸条检查效果。本研究成功表达纯化了SAG抗原表位的重组蛋白,且该重组蛋白具有较好的免疫原性。以此多抗原表位的重组蛋白作为检查抗原研制了胶体金免疫层析试纸条,能够快速检测弓形虫的阳性血清,为基层弓形虫病的快速诊断奠定了基础。 相似文献
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弓形虫病(Toxoplasmosis)是由刚地弓形虫(Toxoplasma gondii,TOX)引起的一种重要人兽共患寄生虫病,该虫是一种可寄生于有核细胞的原虫。当前对弓形虫病的诊断和治疗虽已有一些方法,但均不够理想。本文就该病的免疫学诊断方法的研究进展加以概述,以研究SAG2为检测抗原,以制备弓形虫SAG2蛋白的单克隆抗体和免疫胶体金试纸条为核心,建立一种快速、特异、便捷的检测方法,为我国弓形虫病的诊断与防治、弓形虫与宿主关系、以及弓形虫的分子生物学等研究奠定良好基础。 相似文献
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实验动物弓形虫免疫胶体金快速检测方法的建立及试纸制备 总被引：1，自引：0，他引：1
将样品垫、包被了弓形虫排泄分泌抗原和胶体金结合物的结合垫,包被了弓形虫排泄分泌抗原和抗弓形虫抗体的硝酸纤维素膜、吸水垫依次首尾互相衔接粘贴在白色塑料板上,组装成免疫胶体金快速检测试纸条,并以此建立检测实验动物弓形虫抗体快速检测的方法。该法与传统的ELISA检测结果一致率为85%,而且快速、灵敏,适于基层实验动物弓形虫病... 相似文献
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将样品垫（加样区）、包被了弓形虫排泄分泌抗原和胶体金结合物的结合垫、包被了弓形虫排泄分泌抗原和抗弓形虫抗体的硝酸纤维素膜、吸水垫依次首尾互相衔接粘贴在白色塑料板上，组装成检测弓形虫抗体的免疫胶体金快速试纸条。然后用其进行动物弓形虫病血清抗体检测，并用弓形虫IHA诊断试剂进行对照试验。经对已知弓形虫阴、阳性血清检测，与弓形虫IHA检测结果的符合率为82．5％，金标试纸条较弓形虫IHA诊断试剂能提前2d检测到抗体。结果表明，检测弓形虫抗体免疫胶体金试剂（金标试纸条）的敏感度高于IHA。 相似文献
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免疫层析快速诊断试纸条的制备及在动物疾病诊断中的应用 总被引：2，自引：0，他引：2
胶体金免疫层析技术作为一种新型的免疫学快速诊断和检测技术,具有操作简便、快速、无污染等优点,其前景十分广阔.本文阐述了免疫层析快速诊断试纸条的原理、制备(包括胶体金的制备、标记,试纸条的组装)及其在兽医诊断中的应用. 相似文献
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一、免疫胶体金技术(一)基本原理免疫胶体金技术的检测原理是以硝酸纤维膜为载体,包被已知抗原或抗体,加入待检样品后,样品中的抗体或抗原与膜上包被的抗原或抗体结合,再通过胶体金标记物与之反应形成红色的可见结果,从而达到检测目的。目前,该项技术已在医学上得到广泛的应用,大多数人的传染病都已经研制成免疫胶体金检测方法。在兽医诊断领域也已开始使用,如犬细小病毒、犬瘟热病毒临床快速诊断均已开始使用免疫胶体金快速诊断试纸条。(二)临床应用1、在我国兽医领域的应用胶体金试纸条作为诊断试剂应用于兽医临床,由于它快速、准确,具有… 相似文献
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《养殖与饲料．饲料世界》2017,(1)
弓形虫病是一种呈世界性分布且危害严重的人兽共患寄生虫病。免疫学与分子生物学诊断方法的逐步建立和完善为弓形虫病的有效诊断提供了重要依据。本文就染色试验、凝集试验、酶联免疫吸附试验、免疫胶体金技术、核酸探针、聚合酶链式反应、环介导等温扩增、基因芯片技术等研究和应用进行简要介绍。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献