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2007年10月,某养殖场饲养的2.50多只绵羊,突然出现不明原因的死亡。主诉以1~2岁绵羊发病较多,从发病到死亡不到1d,有的羊排出黑色稀糊状粪便,有的羊掉群,卧地、精神沉郁,衰弱而死,现就临床诊断、治疗经过报告如下: 相似文献
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20 0 0年 3月间本地区某牧场 ,相继发生产羔母绵羊因乳腺肿胀而死亡的现象。经临床症状观察和实验室检验 ,诊断为绵羊乳房炎。报告如下。1 发病情况 该牧场共养绵羊 870只 ,其中母绵羊360只。 2 0 0 0年 2月 2 0日开始发病 ,一般病羊 2~ 5天发生死亡 ,部分病羊未见明显症状即死亡。至 3月1 8日已有 1 86只羊发病 ,死亡 69只。2 临床症状 早期不易发觉病羊 ,当放牧员发现有病时 ,乳房已经肿大 ,而且肿胀蔓延至乳房前及后方腹下 ,乳房一侧或两侧同时患病。开始触之热、痛、肿、硬 ,挤出的奶中有米粒大小乳块 ,以后乳汁逐渐变稀 ,含有血液… 相似文献
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依安县某镇养羊场为了改进绵羊品种 ,于 2 0 0 3年 6月 2 0日从山东省引进小尾寒羊 5 0只 ,运回羊场后按常规饲养 ,未见异常。至 2 4日早突然发病 ,经诊治和采取紧急防制措施 ,至 2 7日整个羊群共发病 1 8只 ,发病率 36 0 % ,死亡 8只 ,死亡率4 4 4 %。1 临床症状 病羊体温升高至 4 1℃以上 ,精神沉郁 ,食欲减退或废绝 ,呼吸加快 ,伴咳嗽和张口呼吸 ;鼻腔中有黏液流出 ,有的出血 ;眼结膜发绀 ,两眼有黄色分泌物。病初便秘 ,后期腹泻 ,有的病羊排水样稀便 ,病羊多严重腹泻后身体虚弱而死 ,病程 3天内死亡。2 病理变化 剖检病羊 ,发… 相似文献
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呼伦贝尔盟陈巴尔虎旗西乌珠尔索木革命等 6户牧民的羊群发生了绵羊羔巴氏杆菌病 ,死亡率较高 ,经济损失严重。1 发病情况 6户牧民饲养羊 31 2 5只 ,4月份为产羔期 ,共存活羔羊 2 692只。 1 999年 5月初 ,羔羊陆续发病死亡 ,至 6月 3日共死亡羔羊 493只 ,平均死亡率 1 8.3% ;其中革命的羊群产羔 589只 ,病死羔 2 93只 ,死亡率 49.7%。患羊病程时间长短不等 ,有的发病 2~ 3天死亡 ,有的发病 1~ 3周死亡。西乌珠尔索木兽医站兽医对病羊采用过青霉素、链霉素等治疗 ,效果不明显 ;又对全部羔羊逐只补硒 (该索木为缺硒区 ) ,未见效果 ;5月下… 相似文献
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1发病情况某种羊场共饲养杜泊肉绵羊168只、本地白山羊200多只,以放牧为主要饲养方式。自2004年4月份以来,陆续有羊只出现排恶臭稀粥样粪便,混有黏液或血液,体温升高达40~42℃。场内兽医诊断为肠炎,曾用安乃近、氟哌酸、庆大霉素等治疗未见好转。后疑为焦虫病,遂用黄色素治疗,病情仍未得到控制,相继有病羊死亡,以羔羊发病率和死亡率最高,其次为1~2岁羊,年龄大的羊发病较少,且很少引起死亡。本地白山羊发病率和死亡率较低。2病理剖检变化剖检病羊4只和病死羊3只,可见尸体消瘦,血液稀薄,皮下脂肪呈胶胨样,有点状出血;全身淋巴结不同程度肿胀… 相似文献
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绵羊多头蚴病 ,在牧区时常发生 ,尤其在羊只剪毛后或春乏时多发。笔者在近 3年临床诊治实践中 ,采用 APL配合输液治疗 ,取得了比较满意的疗效 ,先后共治疗绵羊 2 6只 ,其中怀孕羊 4例 ,2岁羊 8例 ,4岁羊 1 4例 ,除 3例 4岁羊淘汰外 ,其余均全部治愈。1 病因病机本病主要因犬食入含有多头蚴虫羊头 ,便终身带虫 ,多头蚴的孕卵节片脱落后 ,随粪排出体外 ,并从孕卵节片内释放出大量的虫卵 ,污染牧场、饲草和饮水 ,绵羊吞食被污染的饲草或饮水被感染。2 症状羊只离群 ,吃草少、行动笨拙或垂头呆立 ,有的颈项弯向一侧、转圈 ,有的突然前冲或后… 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
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。 相似文献
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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。 相似文献
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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. 相似文献
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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。 相似文献
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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. 相似文献