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正(一)发病情况2013年10月17日,开县某养羊场从四川简阳引进大耳羊312只,体重都在25kg左右。引进4 d后发现1~2只轻微咳、流浆液性鼻液、食欲不振、精神沉郁。3d后,有不同程度发病,从开始的一天几只发病到后来一天二、三十只发病,发病6d后就开始出现死亡,经一个月积极治疗羊群痊愈,期间共死亡127只。(二)临床症状羊群整体精神欠佳,营养状况差;多数被毛无光泽,目光呆滞,精神沉郁,食欲下降,有的不愿采食,部分半口张开,流泡沫状唾液; 相似文献
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伊犁昭苏垦区发生一种以体温升高并伴有神经症状和部分母羊流产为特征的疾病。经流行病学调查、临诊、剖检及微生物学检验诊断为李氏杆菌病。1 发病情况 1 999年 3月该垦区某团有一群羊只 ,出现发病 ,初期病羊精神沉郁 ,步态不稳 ,2～ 3天后出现神经症状 ,孕羊流产。该病发病急、死亡快 ,且较难治愈。 3月 1 5～ 31日该群羊发病 36只 ,死亡2 8只 ,发病率 1 5 .7% ,致死率 78%。2 0 0 0年 3～ 4月间该团又有 2个羊群 ,出现上述病症 ,前后共发病2 5只 ,死亡 6只 ,发病率 5 .6% ,致死率 2 4 %。2 临床症状 初期病羊精神沉郁、呆立 ,运步失… 相似文献
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洛宁县养羊户李某波尔山羊采取舍饲、放牧相结合的管理,存栏波尔山羊200只,2014年4月2号,由于放牧,羊群淋了雨,晚上发现有1头1岁的母羊发病,第2天发展到3只,病羊精神沉郁,不愿走动,气喘,体温升高,4d后发展到16只羊出现类似症状.畜主采取氨基比林、青霉素等治疗后,部分病羊有所好转,但随后病情出现了反复,原来好转的羊又出现了发热、气喘、流鼻涕等症状,病羊只数增加许多,并出现3只死亡.接诊时病羊52只,发病率26％;其中母羊发病45头,占发病养86％,公羊发病7头,占发病羊13％,死亡5只,占发病羊9.6％. 相似文献
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<正>2013年10月末,敦化市贤儒镇太平山村一养羊户饲养的绵羊开始发病,临床症状不明显,但发病时间短,死亡迅速,前一天发现羊精神沉郁不爱走动,次日清早便死于圈舍中,用林可霉素治疗没有效果,到11月4日已陆续死亡5只,到敦化市动物疫病预防控制中心求诊。1发病情况发病的羊年龄都在十月龄到二十多月龄,发病的病程较短,发病正值秋雨连绵天气转冷的时期,圈舍比较潮湿拥挤,白天放牧傍晚进舍。2发病症状病羊膘情较好,表现突然发病,有的病羊在羊群中看不出临床症状,就突然死亡。急性死亡 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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<正> 1 发病情况2005年11月21日,河北省衡水市崔某引进罗曼褐4日龄雏鸡1500只,1周后雏鸡出现零星死亡,至到3周龄死亡停止,从发病到病愈死亡率达20%多。2 临床症状初期雏鸡精神沉郁,不愿走动,常以跗关节着地,继而出现共济失调,步态不稳,驱赶时常借助翅膀拍动行走,可以采食,发病3天后出现肢体麻痹,侧卧于地,采食困难,部分雏鸡发生头颈震颤,最后,病鸡饥渴衰竭死亡。 相似文献
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王进香 《中国兽医寄生虫病》1998,6(4):32-32
西吉县城郊乡高同村1996年有土种绵羊200余只，从2月份开始至3月14日共死亡30只。最后确诊为线虫性肺炎所致。肺线虫对绵羊危害严重，但引起大批死亡的病例报道甚少。1临床症状病羊表现为精神沉郁，不愿走动，食欲减退，消瘦，甩头，喷鼻，咳嗽，呼吸困难，流透明鼻液。重症羊呼吸极度困难。咳嗽，流粘性或血性鼻液。体温升高，平均41℃，病羊食欲减退或废绝，体质衰竭，常站立不稳或卧地不起，一般3～7天死亡。对重症羊采用抗生素疗法，但效果不佳。2剖检变化3月14日我们将2只重病羊（1岁）宰后病检，结果：肺脏呈大叶性肺炎病变，体积增大… 相似文献
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正(一)发病情况某村民从外地引进65只绵羊,半个月前,个别绵羊食欲降低、采食量减少、饮水未发现明显变化、排稀便,曾用柴胡注射液、口服链霉素进行治疗,症状稍有缓解,停药后症状又恢复到发病初期的表现,发病一周后,死亡2只,就诊当天早晨在羊舍中发现死亡3只。与养殖户沟通后,进行了临床检查,并对死亡的绵羊进行剖检及实验室检验。(二)临床检查该羊群大部分羊只排稀便,部分羊只精神沉郁,整体偏瘦,营养 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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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
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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