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1.
不同来源微粒子孢子间血清学关系的比较研究   总被引:5,自引:4,他引:1  
郭锡杰  黄可威 《蚕业科学》1994,20(3):154-157
应用玻片凝集法和酶标抗体法比较了几种不同来源微粒子孢子间的血清学关系,包括本所保存的家蚕微粒子孢子(BmN.b),从安徽绩溪和江苏东台的饲养蚕中收集到的微粒子孢子和从四川收集到的蓝叶虫(phyllobrotiacarmataBaly)微粒子孢子。结果表明,绩溪、东台微粒子孢子与BmN.b之间具有相同的血清学关系,而蓝叶虫微粒子孢子与BmN.b之间无血清学关系。  相似文献   

2.
血清学方法已广泛应用于疾病的诊断和微生物的分类研究,在家蚕微粒子病研究中,由于野外昆虫微孢子虫对蚕的交叉感染及家蚕体中发现异型孢子,已有应用荧光抗体法、酶标抗体法及各种凝集法等进行鉴别的报道,作者采用医学常用的玻片凝集反应、环状凝集反应、荧光抗体、着色sPA菌协同凝集反应等血清学方法对本所蚕病室保存和分离的几种蚕微孢子虫孢子进行鉴别,现将结果报告如后。  相似文献   

3.
微粒子感染家蚕后血液蛋白质和氨基酸组成变化研究   总被引:1,自引:0,他引:1  
本报道家蚕微粒子孢子(Nosema bombycis)添食家蚕(Bombyx mori)在蚕体血液里所引起的蛋白质和氨基酸变化。以正常微粒子孢子、四川大孢子和蒸馏水分别添食四至龄起蚕使蚕体感染微孢子后,在一定时间间隔内取血进行SDS-PAGE,观察到感染微孢子的蚕血有大分子蛋白出现,在电泳图上分离明显。对感染微粒子的家蚕进行氨基酸分析研究,与对照比较,毒性大的正常种Nosema bombycis  相似文献   

4.
PPA-ELISA检测猪传染性胸膜肺炎抗体方法的建立   总被引:4,自引:0,他引:4  
猪传染性胸膜肺炎是由猪传染性胸膜肺炎放线杆菌引起的 ,以急性胸膜肺炎为特征的猪的呼吸道传染病。该病发病率高 ,对养猪业危害极大 ,目前该病的实验室诊断方法主要依靠病原分离鉴定和间接血凝反应检测血清抗体。我们根据葡萄球菌A蛋白 (SPA)具有与哺乳动物血清中IgGFc段结合 ,而与猪IgG的亲和力最强的特点 ,将SPA与辣根过氧化物酶偶联制备的酶标SPA(PPA) ,具有酶标第二抗体的性质 ,且应用范围广。依此 ,试图建立起PPA酶联免疫吸附测定法 (PPA-ELISA) ,检测猪传染性胸膜肺炎抗体的检验程序。1 材料与方法…  相似文献   

5.
家蚕微粒子孢子的免疫酶标鉴别法初报   总被引:7,自引:2,他引:5  
制备了家蚕微粒子(Nosema bombycis)孢子的特异性抗血清,用间接免疫酶标染色法可以对家蚕微粒子孢子进行鉴别。80℃以下温度处理1小时,孢子的抗原性不受影响,100℃处理1小时抗原性消失。  相似文献   

6.
为了建立一种快速、敏感、特异的检测犬冠状病毒(CCV)的方法,利用感染CCV的犬肾传代细胞包被酶联反应板,以辣根过氧化物酶标记的金黄色葡萄球菌A蛋白(HRP-SPA)作为第2抗体,建立了检测CCV抗体的间接ELISA方法。抗原的包被量为每孔3×104个染毒细胞,酶标抗体的工作浓度为1∶40。试验发现,包被的病毒抗原经甲醇固定30min后可以提高试验的敏感性,减少病毒抗原的使用量。与中和试验比较证实,2种抗体检测方法的测定结果呈正相关  相似文献   

7.
以纯化的猪等孢球虫孢子化卵囊为抗原,以辣根过氧化物酶(HRP)标记的山羊抗鼠IgG为二抗,建立了检测猪等孢球虫抗体的间接ELISA方法。经检测筛选出最佳反应条件为:2.5μg/孔纯化的猪等孢球虫抗原包被酶标板;抗原最佳包被条件是37℃,2h;酶标二抗的最佳工作浓度为1∶10000;血清、酶标二抗的作用时间分别为30min、45min。  相似文献   

8.
现代诊断技术在兽医学上的应用及其进展   总被引:2,自引:0,他引:2  
1 免疫酶技术 (EIA)EIA是根据抗原 -抗体结合的特异性 ,以酶作标记物 ,酶对底物具高效催化作用的原理而设计 ,既可用于抗原的检查 ,也常用于血清抗体的检测。1 .1 酶联免疫吸附试验 (ELISA)ELISA是应用最广泛的免疫酶技术 ,包括间接法、夹心法、竞争法等。自VOLLER和BIDWELL(1 975 )首先报道了应用间接ELISA方法检测病毒特异性抗体以来 ,ELISA方法已普遍应用于传染病的流行病学普查、抗体水平的评价以及疫苗质量的监控和标化等 ,迄今为止大多数动物病原体均已发展或报道了ELISA方法的研究与…  相似文献   

9.
加强防微措施 提高蚕种质量   总被引:2,自引:0,他引:2  
唐亚军 《蚕学通讯》2004,24(2):50-52
家蚕微粒子病是一种对蚕业生产具有毁灭性的疫病,被养蚕国家列为检疫对象.该病是由微粒子原虫寄生引起的.微粒子原虫的生活周期有孢子、芽体、裂殖子、孢子芽母细胞等不同的发育阶段.通过其孢子传播而感染发病.蚕的各个发育阶段都可能发生微粒子病,感染后蚕的卵壳、蜕皮、鳞毛、蚕尿、蚕粪、蛾尿、蚕茧、病蚕、蛹、蛾及其尸体等,都会有大量的病原孢子.桑园害虫亦可感染微粒子病,也是该病的传染源.  相似文献   

10.
一、微粒子孢子可用低温水浸法保存多数原生动物适宜于潮湿的环境中生活,桑蚕微粒子虫也具有这种特性.但在保存微粒子孢子时,往往不针对其特性采取适当方法,而是沿用病蚕、病蛾保存法,或是病蚕、病蛾某一组织研磨液滴于滤纸上保存法.为了防止这些材料腐败与发霉,又常采用干燥保存法.但这种保存法,使微粒子孢子的活性丧失很快,效果很差.一般病蚕病蛾体内孢子的活性不能保持到一年,组织研  相似文献   

11.
12.
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   

13.
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   

14.
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   

15.
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   

16.
用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10~0.82μg/g。表明:蜂蜜应视为天然富硒营养品。  相似文献   

17.
Fractures of the anconeal process of 5 pigs ranging in age from 4 to 8 months were studied radiographically and histologically. Clinically, animals with a fracture of the anconeal process had a "tight," restricted gait. In pigs at 4.5 months of age, a radiolucent line through the base of the anconeal process was composed of fibrocartilage, fibrous connective tissue, and hyaline cartilage. Subperiosteal proliferation of woven bone was located along the cranial surface of the olecranon, adjacent to the base of the anconeal process. In older animals, the radiolucent line through the anconeal process contained variable amounts of fibrous connective tissue and fibrocartilage. The proliferation of subperiosteal bone at the base of the anconeal process formed a "buttress callus" which retained a radiolucent area between the callus and the proximal surface of the anconeal process. The latter region of radiolucency was continuous with the transversely oriented line that traversed the base of the anconeal process.  相似文献   

18.
为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …  相似文献   

19.
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   

20.
乳酸杆菌益生作用机制的研究进展   总被引:2,自引:0,他引:2  
乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和 Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。  相似文献   

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