注意带鸡消毒

带鸡消毒是养鸡生产中预防疾病的一重要环节，但有些养殖户只重视进鸡前的消毒工作，而忽视了饲养过程中的卫生和消毒。随着日龄的增长，鸡舍内污染不断加重，环境逐渐恶化，疾病也越来越多，越来越难治，导致鸡群生产性能的下降或死亡。为了保证鸡群的健康生长，加强饲养管理，搞好环境卫生，进行带鸡消毒非常重要。     

如何带鸡消毒

带鸡消毒是养鸡生产中预防疾病的一项重要环节,但有些养殖户只重视进鸡前的消毒工作,而忽视了饲养过程中的卫生和消毒。随着日龄的增长,鸡舍内污染不断加重,环境逐渐恶化,疾病也越来越多,越来越难以治疗,导致鸡群生产性能的下降或死亡。为了保证鸡群的健康生长,加强饲养管理,搞好环境卫生,进行带鸡消毒非常重要。     

带鸡喷雾消毒的方法及注意事项

带鸡喷雾消毒是指用消毒药液对鸡舍、笼具和鸡体进行喷雾消毒,是当前集约化养鸡综合防疫的重要组成部分.养殖户通常存在错误认识,只重视进鸡前的消毒,在实际饲养生产中,鸡群前期疾病相对较少,成活率较高,但随着日龄的增长,鸡舍内污染不断加重,病原会逐渐增多,环境逐渐恶化,疾病也越来越多,导致鸡群生产性能的下降或发病.因此,进行带鸡消毒非常重要.……     

鸡群带鸡消毒的措施与注意事项

带鸡消毒是养鸡生产中预防疾病的一个重要环节,但有些养殖户通常存在错误认识,即只重视进鸡前的消毒工作,而忽视了饲养过程中的卫生和消毒。在实际生产中,鸡群前期疾病相对较少,成活率较高,但随着日龄的增长,鸡舍内污染不断加重,病原会逐渐增多,环境逐渐恶化,疾病也越来越多,越     

如何做好鸡舍的带鸡喷雾消毒

带鸡喷雾消毒是集约化养鸡综合防疫的重要组成部分，是控制鸡舍内环境污染和疫病传播的有效手段之一。鸡舍虽然在进鸡前经过严格消毒处理，但在后来的饲养管理过程中鸡群还会发生这样那样的传染病，这是鸡本身携带、排出、传播病原微生物，再加上外界的病原体也可通过人体、饲料和空气的传播等进入鸡舍。带鸡喷雾消毒能及时有效地净化空气，有效地杀灭鸡舍内空气及生活环境中的病原微生物，消除疾病隐患，达到预防疾病的目的。笔者根据近几年在养鸡生产中带鸡喷雾消毒的实践经验，总结如下。一、严防应激反应的发生为了避免带鸡喷雾消毒引起…     

带鸡消毒的操作要点及注意事项

随着现代养鸡业的快速发展，鸡群疾病也越来越多，越来越难以治疗，而带鸡消毒可以净化环境，能有效杀灭鸡舍空气中浮游的各种细菌和病毒，降低鸡舍内漂浮的尘埃，抑制一氧化碳、二氧化碳及氨气等有害气体的产生，从而有效地防止鸡呼吸道疾病的发生，同时带鸡消毒还能杀灭鸡舍内的多种病原微生物，阻止由病鸡排出的病原体在鸡舍内的积累，并有效地防止马立克、传染性法氏囊、葡萄球菌、鸡白痢等病的发生。     

如何做好鸡舍的带鸡喷雾消毒

带鸡喷雾消毒是当代集约化养鸡综合防疫的重要组成部分，是控制鸡舍内环境污染和疫病传播的有效手段之一。鸡舍在进鸡前虽然经严格消毒处理，但在后来的饲养过程中，鸡群还会发生一些传染病，这是鸡本身携带、排出、传播的病原微生物，再加上外界的病原体也可以通过人、饲料和空气的传播等进入鸡舍。带鸡喷雾消毒能及时有效地净化空气，有效地杀灭鸡舍内空气及生活环境中的病原微生物，消除疾病隐患，达到预防疾病的目的。笔者根据近几年在养鸡生产中带鸡喷雾消毒的经验，总结如下，供参考。一、严防应激反应的发生：为了避免带鸡喷雾消毒引…     

带鸡消毒的技术要点

随着禽业的发展，人们越来越重视疾病防治，但对消毒还是认识不足，尤其是带鸡消毒。一些专业户只知道养鸡搞好疫苗免疫，鸡生病就用药治疗，而不注重利用有效的消毒措施来净化鸡舍的环境卫生，防制疾病。我们强调“防重于治”的原则，就是在用好疫苗免疫的同时，在日常饲养过程中搞好环境卫生消毒工作，通过有效的消毒措施来降低鸡舍内病原微生物的数量，创造一个良好的饲养环境，配合疫苗的免疫效果来控制疫病的发生，消除疾病隐患，使鸡群健康生长，提高养鸡生产水平和经济效益。 一、带鸡消毒的好处 鸡舍虽在进鸡前已彻底消毒过，但在饲…     

带鸡喷雾消毒的方法及易忽视的问题

鸡舍在进鸡前虽然经严格消毒处理,但在后来的饲养过程中,鸡群还会发生一些传染病,这是因为鸡体本身携带,排出,传播的病原微生物,再加上外界的病原体也可以通过人员、设备、饲料和空气的传播等进入鸡舍。带鸡喷雾消毒能及时有效地净化空气,创造良好的鸡舍环境,抑制氨气产生,有效地杀灭鸡舍内空气及生活环境中的病原微生物,消除疾病隐患,达到预防疾病的目的。     

带鸡消毒在养禽业中的应用

带鸡消毒喷雾是近年来养鸡业中一项新举。鸡舍虽然在进鸡前经过严格消毒处理后,但在后来的饲养过程中鸡群还会发生这样那样的传染病,这是鸡体本身携带、排出、传播病源微生物,再加上外界的病原体也可通过人体、饲料和空气的传播等进入鸡舍。带鸡喷雾消毒,能及时有效地净化空气,可有效地杀灭鸡舍空气及生活环境中的病原微生物,消除疾病隐患,达到预防疾病的目的。笔者总结近年来在养鸡上的带鸡消毒经验,现介绍如下,以对养鸡者能有所裨益,供同行参考。一严防应激反应发生:为了避免带鸡消毒引起的应激反应;①消毒前１２小时内给鸡群食用０．１%…     

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。     

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。     

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。     

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。     

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.