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硒碘缺乏与山羊不孕及流产关系 总被引:4,自引:1,他引:4
经对宁夏中卫沙毛山羊选场和大武口山羊瘤胃内容中能量、蛋质和硒、碘、铜、钙、磷、钻、锌、猛、钼、铁、氟等元素和血液硒、铜、碘的测定、证明中卫沙毛山羊选育场的山羊存在硒、碘缺乏症,大武口地区的山羊存在碘、铜缺乏症。通过对母羊补充硒,碘,提高了母羊的发情率,受胎率,降低了流产率,证明硒、碘缺乏会造成山羊不孕和流产。 相似文献
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奶牛习惯性早期流产是一种常见的产科疾病,一般发生在奶牛怀孕40~60d之间,往往给养牛户造成很大的经济损失。笔者经过几年的探索和实践,利用孕酮对奶牛习惯性流产进行提前防治,取得了较好的效果。现介绍如下。 相似文献
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据笔者调查统计,在我县养奶牛户中屡配不孕的占27%~32%,所以防治奶牛不孕,减少空怀,及时配种,是不可忽视的问题。下面谈谈造成奶牛不孕的原因及防治方法,供广大养殖户参考。1卵巢囊肿有两种,一种是卵泡囊肿,占75%左右。表现为长期发情、屡配不孕,直检触摸卵巢发现体积增大,泡壁 相似文献
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奶牛流产胎儿弯曲菌的分离鉴定 总被引:2,自引:0,他引:2
牛生殖道弯曲菌病(Bovine Genital Campylobacteriosis)是由胎儿弯曲菌引起的一种以不育、胚胎早期死亡及流产为特征的传染病。胎儿弯曲菌是一种微需氧的革兰氏阴性菌,分为胎儿亚种(C.fetus subsp.fetus)和性病亚种(C.fetus subsp.venerealis)。胎儿亚种引起牛散发性流产和羊地方流行性流产,也可感染人,引起流产、早产、败血症以及类似布鲁氏菌病的症状。性病亚种是牛生殖道弯曲菌病的病原,主要引起不育、胚胎早期死亡及流产,给奶牛业造成严重的经济损失。 相似文献
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单建平 《畜牧兽医科技信息》2006,(7):29
流产也叫妊娠中断,是由于各种原因的作用,使妊娠期间胎儿与母体之间的正常关系遭到破坏,致使胎儿早期死亡,或从子宫内排出死亡的或不足月的胎儿。1病因1.1非传染性流产①饲养不当日粮单纯,营养不良,矿物质如钙、钴、铁、锰、硒及维生素A,维生素D和维生素E等不足或缺乏,母体和胎儿得不到必需的营养。饲料品质不良;饲喂发霉变质的饲料。②管理不良牛舍阴暗潮湿、狭窄,妊娠牛腹部遭受压挤、冲撞、蹴踢,饲养员惊吓、抽打,在水泥及冰冻地面上突然滑倒,牛互相爬跨等而发生机械性损伤。技术人员操作失误,如粗暴地直肠检查,已妊牛只误用催情药物,… 相似文献
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1 原因分析胚胎发育不良、早期死亡在流产中占有相当大的比例,为隐性流产的主要原因,牛可达38%.如精子或卵子缺损,精子或卵子生命力弱,妊娠早期生殖器官内在环境不适于受精卵的正常发育等.胎膜水肿、胎盘发育不良或畸形,及胎水过多均可引起流产.奶牛病毒性腹泻能引起全身性症状.病毒通过循环到达胎盘中成长的胎儿,可引发早期胚胎的死亡和流产.如果没有出现流产可能会出现木乃伊胎.患病动物和带毒动物是本病的主要传染源. 相似文献
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1流产原因1.1营养因素缺乏维生素或其它营养物质。1.2机械性刺激外伤、外力作用过大等。1.3某些药品的刺激如大剂量使用泻剂、子宫收缩剂等。1.4生殖系统的炎症如患子宫炎等。1.5某些疾病、高热、胚胎发育不良等。2防治2.1先兆性流产分娩期过早出现轻微腹痛,起卧不安,呼吸、脉搏加快等现象,阴道检查时可见子宫颈口紧闭,子宫颈口液塞尚未液化,直肠检查可发现胎儿还活着。治疗可使用抑制子宫收缩药、肌肉注射孕酮50~100mL,每1d或隔1d一次,连用5~7次,禁止施行阴道检查,尽量控制直肠检查,以免刺激怀… 相似文献
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免疫组化研究显示,小鼠妊娠早期子宫壁内CD57^ 细胞数量由孕0天时16.3增至孕2天时62.3,孕4天时已下降,孕6天时降至9.7,而发生胚胎丢失的个体孕6天和孕8天时细胞数量均维持较多,约是孕0天时的4倍。CD4^ 细胞在妊娠后数量由孕0天时29.7增至孕4天时65.6,孕6天时降至7.2,发生胚胎丢失的个体孕6天及孕8天时数量均较多,约为孕0天时的6倍。CD8^ 细胞妊娠后数量由孕0天时39.8增至孕2天时185.0,孕4天时已下降,孕6天时降至3.6,而发生胚胎丢失的个体孕6天和孕8天时细胞数量均维持较多,约是孕0天时的3倍。研究结果提示小鼠妊娠早期子宫壁内CD57^ 细胞、CD4^ 细胞和CD8^ 细胞数量在胚胎着床前均出现先增后减的波动,早期胚胎丢失与孕6天及孕8天时子宫壁内所含大量CD57^ 细胞、CD4^ 细胞和CD8^ 细胞之间存在相关。 相似文献
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在口蹄疫疫苗致流产症状奶牛中,在三个奶牛场分别按泰山磐石散、黄体酮、泰山磐石散与黄体酮配合保胎,将流产症状牛分轻、中、重三型观察疗效。结果表明三组药物对流产轻型病例牛的保胎效果均较明显;对中、重型病例,泰山磐石散单用或配合黄体酮的效果优于只用黄体酮组。从流产牛胎儿流出时间统计,轻、中、重型之间单用泰山磐石散的牛只胎儿流出时间明显少于泰山磐石散与黄体酮配合组及单用黄体酮组。 相似文献
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介绍了酶免疫分析测定法的概念、种类、作用机理,及其在奶牛早期妊娠诊断的研究应用和孕酮酶免疫试剂盒的研究与应用。 相似文献
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调查奶牛流产情况发现,牧场平均流产率达13.0%,尤其是头胎牛集中在某个阶段的流产情况最为严重。流产奶牛多数会出现初乳少或无初乳,初乳抗体水平低下,胎衣不下,子宫内膜发炎等症状。对个别牧场流产牛进行实验室诊断,发现多数流产是由布鲁氏菌引起,少数为衣原体、黏膜病毒与传染性鼻气管炎病毒混合型感染而引起的。奶牛流产给牧场造成极大的经济损失,对社会和生态环境安全造成严重的隐患,给牧场整体控制布鲁氏菌病造成巨大麻烦。针对以上问题,总结了奶牛布鲁氏菌导致流产的综合防控措施,以供生产者借鉴。 相似文献
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Uterine disease after parturition is present in up to 40% of dairy cows and can cause cow infertility,which restricts efficiency of the cow production and leads to large economic loss.System administration and intrauterine infusion are widely utilized to treat cow endometritis.In recent years,the balloon technique is used gradually.Uterus washing pipe is used to inject liquid into the uterus and then the liquid and the inflammatory substances are discharged by the veterinarian.After the inflammatory substances cleaning up,the drug is delivered into the uterus.In order to provide a new method that can treat the infertility in dairy cows with metritis,323 cows which were diagnosed with metritis were used to detect the efficiency of balloon technique,the location of the balloon and the different drugs perfusion against infertility in dairy cows with metritis.The results showed that the balloon technique was showed remarkable effect against cow metritis comparing to the conventional technique.The pregnancy rate of the balloon technique was more than 60%,by contrast,the conventional technique was about 35%.Compared with being placed in the cornua uteri,the efficacy was more obvious when the balloon was placed in the uterine body,and the pregnancy rate was more than 60%.However,the pregnancy rate of another method was almost 40%.There were prominent curative effect of the three drug combinations.The pregnancy rates of the saline+Oxytetracycline,Lutajing+Gongdekang and saline were more than 70%,60% and 55%, respectively.Therefore,compared to the conventional technique and cornua uteri technique,balloon technique(uterine body)significantly increases the pregnancy rate,which is beneficial to be widely used in production.So it is significant that the new technique used widely is important for improving the production efficiency of dairy cows. 相似文献
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Clinical and subclinical endometritis are common causes of infertility and subfertility in high producing dairy cattle, delaying the onset of ovarian cyclic activity after parturition, extending luteal phases and reducing conception rates. Escherichia coli and Arcanobacterium pyogenes cause endometrial damage and inflammation. Components of microbes, such as lipopolysaccharide (LPS), are detected by Toll-like receptors on endometrial cells, leading to secretion of cytokines, chemokines and antimicrobial peptides. Long luteal phases associated with endometritis are probably caused by a switch in endometrial prostaglandin production from prostaglandin F2a (PGF) to prostaglandin E2 . In addition, LPS impairs the function of the hypothalamus and pituitary, and directly perturbs ovarian granulosa cells steroidogenesis, providing mechanisms to explain the association between uterine disease and anovulatory anoestrus. Cows with uterine disease that ovulate have lower peripheral plasma progesterone concentrations that may further reduce the chance of conception associated with endometritis. 相似文献
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本研究旨在表达、纯化奶牛早孕因子重组蛋白及制备多克隆抗体.本试验构建奶牛早孕因子重组蛋白原核表达载体pET32a-EPF,转化至大肠杆菌BL21(DE3)内进行诱导表达,SDS-PAGE切胶纯化的早孕因子重组蛋白免疫BALB/c小鼠制备多克隆抗体,并用Western blotting和ELISA对重组蛋白及抗体进行检测.结果显示,成功表达并纯化了奶牛早孕因子重组蛋白,重组蛋白分子质量约37 ku,表达量约占菌体总蛋白的48.6%,纯化后目的蛋白纯度可达93%,重组蛋白可与所制备的多克隆抗体结合,ELISA测定的抗体效价为1:12 800.结果表明,本研究成功表达并纯化了奶牛早孕因子重组蛋白,为研究奶牛早孕诊断奠定基础. 相似文献