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1基本情况我县某猪场有母猪10头,公猪2头,2003年上半年有6头母猪先后怀孕,其中2头母猪怀孕2月左右先后流产,其余4头母猪中有一头提前分娩,产死胎2头,活仔9头,其中有2头出生后很快死亡,有2头推迟分娩,共产死胎5头,活仔15头,其中有5头出生后很快死亡;仅有1头按时分娩,产死胎1头,活仔12头,其中有3头出生后不久死亡。从6头母猪产仔情况分析,流产率达33%,死胎率达19%,弱仔率23.8%,严重降低该猪场种猪的生产能力,降低经济效益。经综合诊断,确诊为碘缺乏引起种猪繁殖能力下降,导致流产,产死胎、弱仔。该猪场立即采取措施,对种猪进行补碘,以后的母猪… 相似文献
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2003年8～10月份,禹州市某猪场出现以初产母猪流产,经产母猪产死胎、木乃伊胎、弱胎,仔猪大量死亡为主要症状的病症,经临床观察、尸体解剖、实验室诊断后确诊为猪伪狂犬病与细小病毒病混合感染,现报告如下:1发病情况该猪场发病母猪16头,据调查,这些母猪只进行过猪瘟、猪丹毒、猪肺疫疫苗预防注射,没有做过猪伪狂犬病与细小病毒病预防注射。8月初,有两头初产母猪流产,十多天后,经产母猪相继出现产死胎、木乃伊胎、弱胎,其中3头母猪所产仔猪全部为死胎、木乃伊胎,至10月底其余11头母猪产的114头仔猪,92头相继发病,死亡64头,病程3～7天。2临床… 相似文献
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正猪丹毒丝菌俗称猪丹毒杆菌或丹毒丝菌,属丹毒丝菌属(Erysipelothrix),是一种兼性,无芽孢形成的,非抗酸性,革兰氏阳性小杆菌。猪丹毒丝菌可以导致猪丹毒,是一种可以广泛流行的、能够造成重大经济损失的疾病。近几年来,国内猪场陆续发生猪丹毒疫情,而且有的还表现为较高的死亡率,给养殖户造成严重的经济损失。2017年7~8月份河南驻马店某规模化猪场因爆发猪丹毒,造成近10头母猪和120余头保育猪伤亡,现将诊治情况通报如下。 相似文献
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湖南永州地区某猪场年存栏母猪120头,2016年6月份,出现部分仔猪死亡,死亡率11.6%,怀孕母猪流产,流产率18.01%,造成较大损失.通过临床症状和病理解剖,并结合实验室检验,确诊为豆粕霉菌毒素中毒.经过综合治疗,病情得到控制,该猪场恢复正常. 相似文献
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2022年12月25日,陕西省某规模化母猪场1线3单元妊娠母猪发现疑似猪丹毒患猪2头,经过抗生素治疗后2头异常猪均恢复健康。2023年1月8日,该猪场3线和4线妊娠母猪相继发现疑似猪丹毒病例,表现为发热、背部皮肤有红斑、步态僵硬等症状。兽医部实验室对异常猪的血清和背部斑块血拭子进行病原检测,排除了猪繁殖与呼吸综合征病毒(PRRSV)感染、猪瘟病毒(CSFV)感染和猪圆环病毒2型(PCV2)感染。最终在送检样品中检测到红斑丹毒丝菌,从临床症状和实验室检测结果将此次疫情确诊为猪丹毒。针对该结果,兽医部出具以生物安全防控、药物治疗和疫苗免疫为主的综合性防控方案,成功控制了这次疫情。 相似文献
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某商品猪场 1996年建场 ,建于松花江边荒坡上 ,荒坡下是沿江沼泽地 ,是猪场放牧地。猪场有基础繁殖母猪 10 4头 ,种公猪 12头 ,后备母猪 37头 ,后备公猪 4头 ,育成猪 14 5头。2 0 0 1年 7～ 8月 ,在 4 4头初产母猪中 ,有 17头陆续出现死胎、流产、产畸形胎现象 ,占开产母猪的 39%。 2 7头产仔母猪共产仔 186头 ,产后仔猪陆续急性死亡 5 2头 ,发病隔离治疗17头 ,占仔猪 34%。疫情发生后 ,该猪场兽医定性为非典型猪瘟、副伤寒、猪丹毒混合感染。经对症治疗 ,症状有所缓解。但8月 15～ 2 5日 ,该场又有 36头仔猪急性发病 ,死亡 2 2头。根据流行… 相似文献
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1 流行病学调查。2003年10月我省新乡市某猪场发生一起猪伪狂犬病。该场有存栏母猪100头，商品猪700头，部分母猪于产前1个月接种过伪狂犬疫苗(华中农大gG基因缺失苗)。2003年9月份从外地引进后备母猪20头。10月份，该场部分母猪出现症状，2—3d内同栋的猪零星发病，病情逐渐向附近的保育舍、育肥舍和仔猪舍蔓延。与此同时妊娠舍母猪出现发热、咳嗽、呕吐并伴有母猪流产、死胎症状。初始发病仔猪病程5d左右，最快的1～2d内死亡。使用多种抗生素治疗无效。该病的发病率和病死率都很高。近期饲料正常，附近没有猪场。 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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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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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