猪气喘病流行特点及防治措施

目前,由于采取现代化管理技术及规范化防疫措施,许多集约化猪场烈性传染病已得到控制,而以猪气喘病（亦称猪地方流行性肺炎）和胸膜肺炎放线杆菌感染为主要的呼吸道综合征成为现代养猪业的主要危害,尤其是正处在冬季,该病对各大猪场的危害更为严重。     

猪气喘病的防治与净化

改革开放20多年来，中国畜牧业进入快速发展期，养猪生产正向集约化发展，我国已建成一批年产几万头到十几万头具有现代化水平的大型猪场和养猪基地。由于采取现代化管理技术及规范化防疫措施，许多集约化猪场烈性传染病已得到控制，而以猪气喘病（Mycoplasma Pneumoniae of swine MPS，亦称Swine enzootic pneumonia猪地方流行性肺炎）为主的呼吸道病复合征成为现代养猪业的主要危害。本文通过提出各种防治和净化措施，以最大限度减少猪气喘病对养猪业的损失。     

猪气喘病及其诊断

由于采取现代化管理技术及规范化免疫措施,许多集约化养猪场烈性传染病已得到控制,而以猪气喘病(MPS)和胸膜肺炎放线杆菌(APP)感染为主的呼吸道病复合症成为现代养猪业的主要危害。猪呼吸道病复合体(PRDC)是由多种病原引起的呼     

猪传染性胸膜肺炎的诊治

<正>猪传染性胸膜肺炎是由胸膜肺炎放线杆菌引起的一种接触性传染病,是猪的一种重要呼吸道疾病,在许多养猪地区流行,已成为规模化养猪的五大疫病之一,造成重大的经济损失。本病已成为规模化猪场最常见的传染病之一。其危害不仅直接引     

一起猪传染性胸膜肺炎的诊疗报告

<正>随着养猪业规模化的发展,猪传染性胸膜肺炎已成为养猪产业三大常发呼吸道疾病之一,该病死亡率高,需引起重视。猪传染性胸膜肺炎是由胸膜肺炎放线杆菌引起的传染性呼吸道疾病,主要表现为胸膜肺炎。该疾病死亡率高达80%,猪场一旦暴发猪传染性胸膜肺炎,将带来极大经济损失。同时,随着养猪规模的扩大,猪传染性胸膜肺炎已成为养猪产业三大常发呼吸道疾病之一,影响甚重。本文介绍了一例猪传染性胸膜肺炎的发病案例,并进行了总结。     

猪气喘病的防治与净化

改革开放二十多年来,中国畜牧业快速发展,养猪生产正向集约化发展。我国已建成一批年产几万头到十几万头具有现代化水平的大型猪场和养猪基地。由于采取现代化管理技术及规范化防疫措施,许多集约化猪场烈性传染病已得到控制,而以猪气喘病(mycoplasma pneumoniae of swine MPS,     

猪气喘病的病因及防制

猪气喘病是由肺炎支原体引起的猪的一种慢性、接触性传染病,主要临诊症状是咳嗽、喘气、嗜睡、厌食、体温升高等。随着我国畜牧业向商品化、专业化、现代化发展,由于采取现代化管理技术及规范化防疫措施,许多集约化猪场烈性传染病已得到控制,而以猪气喘病、胸膜肺炎和猪蓝耳病等为主的呼吸道综合     

猪气喘病的病因及防制

猪气喘病是由肺炎支原体引起的猪的一种慢性、接触性传染病,主要临诊症状是咳嗽、喘气、嗜睡、厌食、体温升高等。随着我国畜牧业向商品化、专业化、现代化发展,由于采取现代化管理技术及规范化防疫措施,许多集约化猪场烈性传染病已得到控制,,而以猪气喘病、胸膜肺炎和猪蓝耳病等为主的呼吸道综合征却成为现代养猪业的主要危害。     

猪传染性胸膜肺炎的诊治

猪传染性胸膜肺炎是由胸膜肺炎放线杆菌引起的一种接触性传染病,是猪的一种重要呼吸道疾病,在许多养猪地区流行,已成为规模化养猪的五大疫病之一,造成重大的经济损失。本病已成为规模化猪场最常见的传染病之一。其危害不仅直接引起猪的死亡,如果发展为慢性或潜伏于猪群内,可导致猪群生长缓慢,造成严重的经济损失。     

猪气喘病的净化措施

随着我国畜牧业向商业化、专业化、现代化转变,养猪生产正向集约化方向发展.由于采取现代化管理技术及规范化防疫措施,许多集约化猪场烈性传染病已得到控制,而气喘病很难净化,当前,几乎所有学者一致认同,猪气喘病是全球养猪界公认的最难净化的猪病,成为困扰养猪业的一大难题.猪气喘病(又称猪支原体肺炎,猪地方流行性肺炎)是猪的一种直接接触、慢性呼吸道传染病,发病率高,本病在世界范围内广泛流行.……     

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.