仔猪大肠杆菌病的诱因、诊断及防制措施

仔猪大肠杆菌病是肠道内大肠杆菌异常增殖，主要是病原性大肠杆菌及其所产生的毒素引起的一种疾病，是目前普遍发生的对仔猪生产危害较大的一种传染病。根据猪的生长期、病因和致病菌的致病性不同，可分为仔猪黄痢、白痢和水肿病。     

仔猪大肠杆菌病的综合防治

仔猪大肠杆菌病是由猪源致病性大肠杆菌引起的一类传染病。由于猪源致病性大肠杆菌类型的不同以及猪年龄、个体及生理机能的差异,因而发生不同的仔猪大肠杆菌病。常见的有仔猪黄痢、仔猪白痢和猪水肿病,其中仔猪黄痢、猪水肿病危害最为严     

猪大肠杆菌病的流行情况和防制措施

猪大肠杆菌病是由致病性大肠杆菌引起的一种仔猪肠道传染病,其病死亡率高,给养猪户造成较大损失。故本文对这几种主要的猪大肠杆菌病的流行特点,流行情况及防制措施进行了阐述。     

猪大肠杆菌病的流行情况和防制措施

猪大肠杆菌病是由致病性大肠杆菌引起的一种仔猪肠道传染病,其病死亡率高,给养猪户造成较大损失.故本文对这几种主要的猪大肠杆菌病的流行特点,流行情况及防制措施进行了阐述.     

猪大肠杆菌病的预防及中西医治疗

猪大肠杆菌病是由大肠埃希氏菌所引起的一类疫病。临床上根据病原菌的血清型,以及患病猪的年龄差别,常分作初生仔猪黄痢,哺乳仔猪白痢和断奶前后的仔猪水肿病。1病原猪大肠杆菌病的病原是各种不同血清型的致病性大肠杆菌。致病性大肠杆菌广泛存在于猪的肠道和外界环境、土壤中。     

畜禽常见病及其防治：猪大肠杆菌病

猪大肠杆菌病（Ｃｏｌｉｂａｃｉｌｏｓｉｓｉｎｐｉｇ）是由致病性大肠杆菌（ＥＰＥＣ）引起的猪肠道传染病。其发病率较高（５１％），尤其在近年来，对养猪业危害较大，应引起高度重视。根据发病日龄和病原菌血清型的差异，猪大肠杆菌病可分为仔猪黄痢、仔猪白痢和猪水...     

猪群常见细菌病的药物预防和治疗

1 大肠杆菌病 病原由致病性大肠杆菌引起的猪的肠道传染病。根据发病日龄和病原菌血清型的差异,可分为仔猪黄痢、仔猪白痢和仔猪水肿病3种。     

猪大肠杆菌病的诊疗体会

<正>随着我国畜牧业的发展,养猪成为一部分人致富的手段。而畜牧业的发展,离不开对该种生物疾病的防治的了解。大肠杆菌病是指是多种动物疾病的统称,该种疾病都是有致病性大肠杆菌引起的,主要有局部性的或者全身性的大肠杆菌性腹泻、大肠杆菌感染、毒血症、败血症等。下面主要对猪大肠杆菌病的诊断和治疗的体会作一介绍。1流行病学猪大肠杆菌病是由于致病性大肠杆菌感染仔猪引起的一类肠道疾病,且具有传染性。由于仔猪     

编读互动

猪大肠杆菌病是肠道内大肠杆菌的异常增殖。主要是由病原性大肠杆菌及其所产生的毒素引起的一组肠道性传染病,在不同品种的猪群中均有发生,在养猪生产中对仔猪危害较大,常可造成新生仔猪大批死亡。因仔猪的生长日龄及病原菌的血清型不同,常见引起的疾病种类有仔猪黄痢、仔猪白痢和仔猪水肿病。该病的发生常与猪舍通风不畅、卫生条件差、温度、应激、饲料品质不良等有关,平时应注意加强猪群的饲养管理工作,了解并掌握猪大肠杆菌病的发生及防治。     

仔猪大肠杆菌病的防治

猪大肠杆菌病是由致病性大肠杆菌引起的猪的一种急性传染病的总称。包括仔猪初生后1周内所发生的仔猪黄痢，2～3周龄发生的仔猪白痢和6～15周龄发生的仔猪水肿病。     

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。     

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。     

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。     

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。     

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.     

不同样本商品蜂蜜中硒含量的测定

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。     

乳酸杆菌益生作用机制的研究进展

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。     

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.