四种试剂盒检测猪口蹄疫O型合成肽疫苗抗体的对比试验

使用国产的4种猪口蹄疫病毒VP1结构蛋白抗体ELISA诊断试剂盒(VP1-ELISA)、猪口蹄疫O型液相阻断ELISA检测试剂盒(LB-ELISA)、猪口蹄疫正向间接血凝试剂盒、猪O型口蹄疫病毒ELISA抗体检测试剂盒(O-ELISA)同时检测猪口蹄疫O型合成肽疫苗免疫后的50份血清样品,阳性率分别为98.0%、94.0%、54.0%、90.0%。同时使用农业部规定的3种试剂盒分别检测20份血清样品的抗体滴度发现,VP1-ELISA试剂盒和LB-ELISA试剂盒阳性符合率为95%,平均抗体滴度相差0.7,与IHA试剂盒符合率为55%,平均抗体滴度相差3.8,故LB-ELISA试剂盒可以用来评价合成肽疫苗免疫的抗体,而IHA试剂盒不能用来检测合成肽疫苗免疫的抗体。     

两种试剂盒检测牛羊口蹄疫O型抗体的对比试验

为了探索快速检测牛羊口蹄疫O型抗体的方法和准确性,使用HI、液相阻断ELISA两种试剂盒对牛、羊194份血清进行口蹄疫O型抗体检测,以探讨其相关性和特点。结果发现,液相阻断EILSA试剂盒对牛羊血清的检测灵敏度高,血清HI效价与液相阻断ELISA检测的效价不成正相关。液相阻断EILSA检测灵敏度明显高于正向间接血疑试验。     

三种试剂盒检测猪口蹄疫O型抗体的对比试验

使用三种猪口蹄疫O型抗体检测试剂盒分别检测接种猪口蹄疫O型合成肽疫苗和猪口蹄疫O型灭活疫苗的免疫抗体,以探讨三种抗体检测试剂盒的相关性。结果发现,猪口蹄疫病毒VP1结构蛋白抗体ELISA试剂盒和猪口蹄疫O型液相阻断ELISA试剂盒都可检测猪口蹄疫O型合成肽疫苗,两种试剂盒的相关性达90.8%,而间接血凝试剂盒不能用来检测猪口蹄疫O型合成肽疫苗;猪口蹄疫O型液相阻断ELISA试剂盒和间接血凝试剂盒可用来检测猪口蹄疫O型灭活疫苗,两种试剂盒的相关性达93.7%,而猪口蹄疫病毒VP1结构蛋白抗体ELISA试剂盒不能用来检测猪口蹄疫O型灭活疫苗。     

O型口蹄疫病毒固相竞争ELISA抗体检测方法的建立

本研究建立了O型口蹄疫病毒固相竞争ELISA抗体检测方法,确立了O型口蹄疫病毒固相竞争ELISA抗体检测方法检测O型口蹄疫血清阴阳性判定标准：抗体效价大于或等于1：32时判为O型口蹄疫抗体阳性;1：16～1：32时判为O型口蹄疫抗体可疑。检测131份阴性血清、口蹄疫亚洲1型阳性血清和A型阳性血清,固相竞争ELISA方法和液相阻断ELISA方法的特异性分别是95．5％,84．7％。固相竞争ELISA方法检测口蹄疫亚洲1型、口蹄疫A型阳性血清时,无交叉反应,O型口蹄疫病毒感染牛、免疫牛和感染猪血清的阳性检出率均为100％,免疫猪检出率为86．7％。     

猪O型口蹄疫3种抗体检测方法的比较

用液相阻断ELISA、正向间接血凝试验、VP1结构蛋白ELISA3种抗体检测方法同时检测来自全国10个省25个规模猪场、18个屠宰场及散养户的937份猪血清中的O型口蹄疫抗体。结果表明,这3种方法检测的抗体阳性率分别为75.9%、81.8%和62%。与液相阻断ELISA相比,正向间接血凝试验比VP1结构蛋白ELISA的符合率高,前者的敏感性为94.9%,特异性为59.3%,后者的敏感性为75.2%,特异性为79.6%。研究为猪O型口蹄疫免疫抗体监测工作的实施提供了较好的参考。     

两种口蹄疫抗体检测方法的操作体会

正免疫抗体效价检测,已成为现代动物疫病防控科学评价动物免疫接种效果的有效方法之一。正向间接血凝试验通常只用于O型口蹄疫抗体检测,该方法主要利用口蹄疫抗原来检测血清中是否含有口蹄疫抗体或判定抗体滴度能否达到免疫保护标准。液相阻断ELISA适用于O型、亚洲I型和A型口蹄疫抗体检测,其操作较正向间接血凝试验相对繁琐,但该方法精准性和稳定性高,既能评价口蹄疫免疫情况,又能检测口蹄疫病毒     

猪O型口蹄疫免疫抗体检测方法的比较

试验采用口蹄疫O型间接血凝试验和O型口蹄疫抗体液相阻断ELISA 2种试验方法检测了60份血清中猪O型口蹄疫免疫抗体.研究结果显示,60份被检血清口蹄疫O型间接血凝试验检测合格率为93.3％,O型口蹄疫抗体液相阻断ELISA试验检测的合格率为73.3％,口蹄疫O型间接血凝试验检测合格率明显高于O型口蹄疫抗体液相阻断ELISA试验检测的合格率（相差20个百分点）;2种方法的总符合率为66.7％、＜25（＜2^6）的符合率为28.6％,≥2^5（≥2^6）的符合率为82.1％.2种方法检测出的整体免疫效果较好,平均合格率远高于农业部规定的70％.     

不同方法检测猪O型口蹄疫疫苗抗体效价与攻毒保护相关性研究

为评价不同检测方法检测的口蹄疫疫苗抗体效价与免疫保护率的相关性,使用O型液相阻断ELISA、正向间接血凝试验、VP1结构蛋白抗体ELISA三种检测方法对免疫不同类型O型口蹄疫疫苗的60头猪进行血清抗体跟踪测定,免疫21 d后,分别用OZK/93和O/(XJ/10-11/MYA/98)毒株进行攻毒保护实验.数据统计和分析结果显示,0型液相阻断ELISA试验测定的抗体效价与攻毒保护率存在着极显著的正相关性(P＜0.01),相关系数为0.75;正向间接血凝试验测定的抗体效价以及VP1结构蛋白抗体ELISA法测定的S/P值与攻毒保护率之间均不存在线性相关关系(P＞0.05).试验表明,O型液相阻断ELISA抗体检测方法可作为田间猪O型口蹄疫疫苗免疫效果的评价方法.     

口蹄疫O型、AsiaⅠ型免疫抗体的检测

用口蹄疫O型和Asi aⅠ型双价疫苗对牛、羊进行免疫,于免疫后一个月和五个月,分别用口蹄疫O型和Asi aⅠ液相阻断ELISA型试剂盒进行抗体监测。结果牛在免疫后一个月,O型抗体水平≥1:128的占91.96%,免疫后五个月O型和Asi aⅠ型的抗体仍维持较好水平,≥1:128的比率接近50%,说明免疫效果较理想。同时对免疫后一个月血清的液相阻断ELISA法和正向间接血凝法(IHA)测定结果进行了比较,经统计学分析,其相关系数为r=0.8854,说明两种方法检测结果较相近,两者间有较好的相关性,且液相阻断ELISA法比IHA所测定的滴度普遍偏高。     

O型口蹄疫抗体金标试纸盒检测免疫动物抗体效价与攻毒保护关系

本研究目的在于用O型口蹄疫金标试纸条研究免疫动物抗体效价与攻毒保护之间的对应关系以及免疫牛抗体消长规律.用金标试纸条检测了口蹄疫O型疫苗质量标准规定的牛、羊和猪免疫和攻毒血清抗体效价及不同免疫程序的牛血清效价.结果显示,当牛、猪和羊免疫血清稀释≥1∶8时,试纸条是阳性结果,表示有99％的被免疫动物属于抗体水平保护范围;被检测血清稀释≤1∶2时,是阴性结果,表示被免疫动物抗体水平属于不保护范围;血清稀释1∶2～1∶8时,是阳性结果,表示有50％的被免疫动物属于抗体水平保护范围.牛在首次免疫8周后加强免疫可以获得良好的保护率和保护时间.通过本试验确定了金标试纸条检测免疫动物抗体效价与攻毒保护之间的关系及牛加强免疫最佳的时间.     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

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。     

商会自治的基石——商会自治规范研究

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。     

獭兔睾丸的组织学观察

家兔作为一种实验动物 ,推动了繁殖技术的发展。本试验通过对不同年龄公獭兔的睾丸进行组织学观察、测定 ,研究精子的发生规律 ,为系统地进行繁殖生理工作提供依据。1　材料与方法选 60日龄、75日龄、90日龄 3个年龄公獭兔各5只 ,用外科手术法摘取两侧睾丸 ,放入 Bouin氏液中固定 ,二甲苯透明 ,石蜡包埋 ,切成 5～ 8μm切片 ,H.E.染色。在显微镜下观察 ,并进行定量组织学指标测定及差异性比较。2　结果和讨论2 .1　睾丸定量组织学指标的测定结果　见表 1。表 1　獭兔睾丸定量组织学指标　　　μm,个 /精细管60日龄 75日龄 90日龄曲细精管…     

中华人民共和国农业部公告 第267号

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。 …     

鸡败血支原体垂直传播模式及其阻断方法

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。     

Observations of fracture of the anconeal process of the ulna of swine

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.     

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.     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

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.