个体奶牛乳房炎发生的原因及防治措施

注意事项我们农场现饲养奶牛1700多头,分散饲养在600多户。奶牛患乳房炎较多。1990年6月份调查检验了62户,共检验奶牛117头,患乳房炎的72头(其中58头为隐性乳房炎)。通过调查认为个体饲养奶牛发生乳房炎的原因是。奶牛畜舍卫生条件差。据对62户的调     

6月份贵州、青海发生多起非洲猪瘟疫情

正据农业农村部网站报道,6月份(截至2019年6月25日)贵州省黔南州、青海省海东市两地发生多起非洲猪瘡疫情,涉及存栏生猪1 447头。具体如下:6月11日,贵州省齡南州都匀市一养殖户饲养的生猪发生非洲猪瘟疫情,该养殖户存栏生猪331头,发病15头,死亡10头。6月20日,贵州省黔南州平塘县克度镇落良村斗篷     

进口美国斯荷垣牛检疫期观察

农牧渔业部畜牧局1985年4月份引进的美国荷斯坦奶牛159头(其中:公29头、母130头),从到进日起至6月10日止,饲养在中国农科院畜牧所昌平牛场隔离检疫。今将该批牛在京检疫期间的生态表现、适应情况、饲养管理等有关情况简报于下。     

仔猪注射链球菌疫苗后暴发链球菌病的诊断

2003年6月份我县某规模仔猪养殖场饲养有45-50日龄的二元杂仔猪348头,膘情中等,均为从外地不同养殖场调运回该场饲养的商品肉用仔猪。2003年6月19日该场对全部仔猪注射3头份／头量的链球菌疫苗。6月21日发现有个别仔猪发病,随后病猪逐渐增多,疫病呈暴发之势,至7月6日已先后发病12l头,发病率34．8％,经抢救治愈42头,死亡79头,     

一起多发性牛巴氏杆菌病的诊治报告

山丹县、民乐县沿祁连山的乡村多为农牧交区域,每年6月份农户饲养的牛羊多数转到夏季场放牧或转到农区集中饲养育肥。从2010年6上旬开始,陆续有群众反映放牧的牦牛或舍饲的牛发生零星死亡,至7月份共有2县5个地方报病情,共发病35头,死亡12头。     

外购仔猪育肥生产场户猪粮比价计算明细

辽宁省2008年10月份外购仔猪场户出售的育肥猪在平衡点上运营.以每批饲养200头育肥猪,5～6月购入仔猪,10月份出售育肥猪为例进行计算.     

一例仔猪铜中毒的诊疗

(一)发病情况 2006年6月17日,突泉镇王家养猪场发生仔猪死亡情况,饲养育肥猪43头,仔猪165头,共计218头,发病猪品种为二元仔猪.     

猪蓝耳病与大肠杆菌、沙门氏杆菌混合感染的诊治报告

某新建猪场，饲养300头基础母猪，于2003年6月产仔，其间有大批猪只死亡。至7月份，断奶仔猪也陆续出现死亡。     

武平县象洞乡母猪繁殖障碍综合症调查

1997年6月份以来，在象洞乡的联坊、光彩、洋贝等村发生了一种主要危害繁殖母猪，可使母猪特别是初产母猪发生流产、产出死胎、畸形胎和木乃伊股，而母猪本身并无明显症状的繁殖障碍性传染病。为此笔者对全乡繁殖母猪作调查，现报告如下：1发病情况全乡共饲养繁殖母猪921头，公猪18头，其中饲养瘦肉型繁殖母猪227头，瘦肉型分娩母猪117头。据查：该病6月份开始发生，到10月10日止，4个多月内全乡共有72头母猪发病，发病数占全乡繁殖母猪饲养数的7．8％，仅在6月1日～10月10日期间占全乡分娩母猪数309头母猪的23．3％（见表），其中初产母猪…     

一个高效益的奶牛场

河北省坝下农科所奶牛场,饲养奶牛150头,其中基础母牛109头。1992年1—7月共产奶44万公斤,头均日产19.4公斤,分別比上年增长12.5％、11.1％。公斤牛奶成本1—5月份平均为0.524元,6月份0.596元,7月份0.699元。 1991年该场牛奶生产和加工利润为40万元;1992年将略高于上年。一个百头成母牛的小场,创出如此高额利润的主要经验是:     

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.