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以水貂阿留申病病毒对流免疫电泳(CIEP)细胞抗原为材料,经酶印迹(Westemblotting)测定,水貂阿留申病病毒CIEI细胞抗原与多克隆阳性血清反应,分子量为60000,50000和25000,而与CIEP阴性的抗水貂阿留申病病毒的单克隆抗体(Y—2—9)反应,分子量为60000,50000.因此初步确定水貂阿留申病病毒CIEP细胞抗原决定族位于分子25000蛋白上. 相似文献
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水貂阿留申病,又称水貂浆细胞增多症。是由病毒引起的一种慢性贫血性传染病。到目前为止尚无特异性治疗方法。国外集中研究特异性诊断方法,以通过检疫、淘汰等措施,逐步控制和清除该病。对流免疫电泳(CIEP)诊断阿留申病得到推广和实际应用。该法特异性强,检出率高,同时适宜大规模检查用。我们于1983年首次在国内研究成功应用 CIEP 检测水貂阿留申病。1986年应用该法俭测,我国饲养的不同基因型水貂,对其发病率进行探讨,以期为我国彩色水貂抗病育种和水貂新色型培育提供依据。现将试验情况报告如下。 相似文献
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<正> 水貂阿留申病(AD)是一种慢性进行性病毒病。它造成大量貂繁殖机能下降、空怀、死胎、流产,秋冬季节大批死亡。为了尽快控制疫情传播,实现种貂群全面检疫和净化,我站在中国农科院特产研究所指导下,首次应用对流免疫电泳(CIEP)特异性诊断法,对两个貂场的5327只水貂进行了阿留申病检测。 相似文献
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用感染水貂阿留申病病毒G株(ADV-G)的猫肾传代细胞(CRFK)建立了检测水貂阿留申病病毒抗体的PPA-ELISA法。该方法敏感性高于CIEP 16倍,具有快速,准确的优点,可用于病原定位,是水貂阿留申病检疫和研究较为理想的方法. 相似文献
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水貂阿留申病(Aleutian Disease)在我国已普遍流行,感染率甚高,目前无疫苗及药物治疗,只能通过检测手段来净化貂群。目前在国际上采用的CIEP检验方法,因成本高,条件复杂,不易在国内推广。本文提出了一种快速、检出率高、易掌握、便于推广的酶标斑点纸条法。该法是一种新发展起来的免疫学新技术,其原理是用过碘酸钠化学交联方法将酶分子交联到水貂阿留申病的免疫球蛋白分子上,通过底物的反应作用,生成肉眼可见的颜色反应。此方法优于通常诊断水貂阿留申病的对流免疫电泳法(CIEP)和碘反应法,其特点是:1.灵敏度高,特异性强;2.设备简单,方法简便,标本持久;3.成本低廉,适于批量检验,便于普及推广。 相似文献
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为建立水貂阿留申病(AD)抗体间接ELISA检测方法,本研究通过生物信息学预测筛选多个阿留申病毒(ADV)VP2结构蛋白保守的B细胞表位,设计人工诊断抗原肽SD,经原核表达、纯化后作为ELISA的包被抗原,建立了间接ELISA检测方法。结果显示该方法特异性好、敏感性高,与对流免疫电泳(CIEP)方法的符合率达93.2%。利用该方法对我国主要养貂区域的2190份血清样品进行AD血清学调查,结果显示山东、大连、河南、吉林、黑龙江AD阳性率分别为80.41%、82.14%、69.81%、71.24%、78.41%,表明AD在我国已呈高发态势。本研究建立的ELISA方法显著提高了AD阳性检出率,对貂场AD的净化及养貂产业的健康发展具有重要意义。 相似文献
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<正> 阿留申病(AD)是水貂的一种慢病毒感染,其主要临床特征为血管球性肾炎、动脉炎、浆细胞增多症和高丙球蛋白血症。Cho和Ingram曾经报道了用血清学方法诊断水貂阿留申病,他们从接种AD病毒的水貂组织中分离抗原进行对流免疫电泳,但在制备抗原时需要反复超速离心。一些研究工作者也用同样的程序提取了AD抗原,但这种制备抗原的方法不便于实际应用。 相似文献
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阿留申病是水貂的一种慢性病毒性传染病,每年给养貂业造成重大经济损失,是水貂的三大传染病之一,本病至今缺乏特异性防治方法。自1972年以来,国际上已普遍推广使用对流免疫电泳试验(CIEP)逐年检测貂群,早期检出病貂,严格淘汰,保留阴性健康貂,用作繁殖。这是目前世界上控制和净化阿留申病的唯一有效手段。我国是世界上中低档貂皮的主要生产国之一。全国现养有水貂约300—400万只左右。每年要花费大量外汇从国外引进5000—8000头种貂。但是,我国对于水貂阿留申病的检疫手段十分落后。在口岸检疫上,至今仍沿袭非特异性的碘凝集反应,使许多阳性病貂漏检,不断流入国内,以至国内各貂场阿留申病流行情况十分严重,这是我同貂业生产水平低下的主要原因之一。 相似文献
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本实验研究依据阿留申病毒(ADV)的特点,研制了四种不同类型的免疫生物制剂,并分别对临床健康的阿留申病对流免疫电泳(AD.CIEP)阴性水貂接种,攻毒后进行循环免疫复合物(CIC)和抗体(Ab)滴度检测,安死后检查病理组织学变化。本实验结果表明:四种不同类型的生物制剂,其免疫应答反应有显著不同;而同种类型免疫生物制剂,由于剂型、接种剂量不同,其免疫效果亦有明显差异。实验得出,白油佐剂ADV—G亚单位疫苗和白油佐剂(846)抗原的免疫效果好,是用于免疫预防水貂AD有希望的免疫生物制剂。 相似文献
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《中国预防兽医学报》2020,(7)
为检疫不同感染率貂场水貂阿留申病(AD)的感染状态,本研究利用碘凝集(IAT)和对流免疫电泳(CIEP)方法对水貂阿留申病毒(AMDV)不同感染率的两个貂场(A、B两个貂场)进行AD检疫,采用PCR和荧光定量PCR(qPCR)方法进一步分析AMDV的感染状态。结果显示,根据IAT和CIEP检测结果可将貂群分为4个群体:IAT~-CIEP~-、IAT~+CIEP~+、IAT~-CIEP~+和IAT~+CIEP~-,不同AMDV感染率貂场各群体占比有明显差异;A场母貂感染率显著高于公貂(p0.01),而B场公貂与母貂感染率差异不显著。PCR结果表明,低感染率A貂场中IAT~-CIEP~-貂群中存在感染初期貂(IAT~-CIEP~-PCR~+);高感染率B貂场中存在超过40%的抗性貂(IAT~-CIEP~+PCR~-)和耐受貂(IAT~-CIEP~+PCR~+)。q PCR结果显示,A场貂群的病毒载量集中分布在1.1×10~4拷贝/μL～7.5×10~5拷贝/μL,而B场貂群的病毒载量集中分布在1.8×10~3拷贝/μL～9.5×10~3拷贝/μL范围内。统计学分析显示,低感染率A貂场水貂体内AMDV载量显著高于高感染率的B貂场(p0.01)。表明上述联合检疫方法可准确判断AD的感染状态,且不同感染率貂场AD的感染状态存在明显差异。本研究为貂场检疫淘汰阿留申病貂提供了参考依据。 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