蛋鸡脂肪肝综合征的防治

蛋鸡脂肪肝综合征是蛋鸡养殖业中常见疾病之一,以肝脏脂肪含量升高为主要特征.营养失衡、激素水平、脂质过氧化损伤及应激等因素都可引起蛋鸡脂肪肝综合症的发生.介绍了蛋鸡脂肪肝综合征的临床症状、病理变化,并分析了该病的病因,提出了预防和治疗该病的具体措施.     

蛋鸡脂肪肝综合征诱发因素及营养调控

脂肪肝综合征(FLS)是蛋鸡常见的一种营养代谢性疾病,直接影响家禽业的经济效益,越来越引起人们的高度重视。对蛋鸡FLS的诱发因素及营养调控作一阐述,以期为蛋鸡脂肪肝综合征的防治提供参考。     

蛋鸡脂肪肝综合征的防治

蛋鸡脂肪肝综合征是蛋鸡养殖业中常见疾病之一,以肝脏脂肪含量升高为主要特征。营养失衡、激素水平、脂质过氧化损伤及应激等因素都可引起蛋鸡脂肪肝综合症的发生。介绍了蛋鸡脂肪肝综合征的临床症状、病理变化,并分析了该病的病因,提出了预防和治疗该病的具体措施。     

鸡脂肪肝综合征的病因分析及防治措施

鸡脂肪肝综合征是发生于产蛋鸡和肉用仔鸡的一种营养代谢性疾病,该病以产蛋鸡多发,导致产蛋率急剧下降,常给养禽业造成较大的损失.脂肪肝同时导致肝出血又被称为脂肪肝-出血综合征,蛋鸡死亡率相当高.     

蛋鸡脂肪肝综合征的病因分析与防治措施

脂肪肝综合征是蛋鸡比较常见的营养代谢病,蛋鸡日常采食的饲料中整体营养量比机体所需的多就容易发生。本文分析了蛋鸡脂肪肝综合征的发病症状与原因,并且提出了针对性的防治措施。     

蛋鸡脂肪肝综合征的原因与诊治

蛋鸡脂肪肝综合征是蛋鸡养殖生产中常见和多发的一种营养代谢性疾病综合征,特点是发病突然,产蛋量下降,高产蛋鸡发病后会发生突然的死亡。会给蛋鸡养殖带来极为严重的经济损失。本文对蛋鸡脂肪肝的发病原因、临床症状、病理变化及防治措施简单介绍。     

笼养蛋鸡脂肪肝症的诊断要点及综合防控

正蛋鸡脂肪肝(Fatty liver hemorrhagic syndrome,FLH)又称脂肪肝综合征或脂肪肝出血性综合征~([1]),主要是因为蛋鸡采食了高能量的饲料,大量脂肪沉积于肝脏,导致肝脏变性的一种营养代谢疾病~([2]),该病最初是由Couch于1956年首先进行报道,病因极其复杂,是全球蛋鸡养殖生产中最常见的一种营养代谢病。董晓芳~([3])报道指出,肝脏肝病主要发生在蛋鸡和某些品种的肉用仔鸡,尤其是笼养的产蛋高     

笼养蛋鸡脂肪肝综合征的诊治

笼养蛋鸡脂肪肝综合征的诊治金方土，余时光（浙江省杭州市蛋鸡试验场３１１１１５）鸡脂肪肝综合征是由于鸡体内的脂肪代谢发生障碍所引起的营养性疾病。其特征是大量脂肪沉积在肝脏和体腔内，肝脏发生脂肪变性。本病多发生在笼养的种鸡和蛋鸡。１９９２年７月份高温季节...     

笼养蛋鸡常见病及防治

笼养蛋鸡生产性能高、极少运动,若其营养不平衡和消耗过大,则易发生疲劳症、脂肪肝综合征、脱肛等疾病.     

蛋鸡脂肪肝综合征的发生原因及其防治措施

<正>蛋鸡脂肪肝综合征(Fatty liver syndrome,FLS),又称为脂肪肝出血综合征(FLHS),是营养障碍、脂肪代谢紊乱、内分泌失调等多因素引起的肝脏中脂肪沉积增多的一种营养代谢病,该病是养鸡产业中最常见的疾病之一,主要发生在产蛋高峰期的笼养蛋鸡,临床上过度肥胖、肝脏脂肪样变性及产蛋下降为主要特征,特别是在炎热的夏季最易发生。任成林等报道指出,蛋鸡脂肪肝综合征     

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.