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胎衣不下是奶牛产后的一种常见病.一般母牛产后经过8~12h胎衣尚未全部排出即可定为胎衣不下。其发病率与饲养管理水平关系密切.我国平均发病率在10%左右.而有的奶牛场可高达40%。胎衣不下不但引起奶牛产奶量下降。还会引起子宫内膜炎、子宫复旧延迟和子宫脱出.导致产后发情延迟。配种次数增加。从而大大降低繁殖率.使许多奶牛提前淘汰,给养牛业造成很大的经济损失。为此结合牧场工作实践,就奶牛胎衣不下的病因、治疗和预防简单介绍如下。 相似文献
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1危害据报道,胎衣不下患牛中,有80%以上牛会继发感染子宫内膜炎,结果导致奶牛产后发情延迟和配种次数增加。奶牛不孕症与胎衣不下的有关因素符合率高达70%以上。有40%胎衣不下者会继发感染乳房炎、子宫内膜炎、子宫复旧延迟和子宫脱出,从而导致不孕,产奶量下降,致使许多奶牛被迫提前淘汰。 相似文献
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产后应用催产素对奶牛胎衣不下的防治效果 总被引:2,自引:0,他引:2
巩俊安 《青海畜牧兽医杂志》1995,(6)
产后应用催产素对奶牛胎衣不下的防治效果巩俊安(青海省西宁市奶牛场,810003)胎衣不下是奶牛常见产科疾病之一,发病率占分娩母牛的20%~40%。胎衣不下的母牛88%以上继发子宫内膜炎,导致产后发情延迟和配种次数增加,受胎率降低 ̄[1]。因此,治疗和... 相似文献
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中西医结合治疗奶牛胎衣不下症 总被引:1,自引:0,他引:1
曹迎春 《养殖与饲料.饲料世界》2010,(3):22-23
胎衣不下是奶牛产后的一种常见病,一般母牛分娩后胎衣在8~12h内不能自然完全排出即可定为胎衣不下。在我国奶牛胎衣不下的发病率一般在12%~30%,也有高于40%以上的报道。胎衣不下不但引起奶牛产奶量下降,还会引起子宫内膜炎、子宫恢复推迟和子宫脱,导致产后发情延迟、配种受胎率降低,使许多优秀的高产奶牛被淘汰,给养牛业发展造成了很大的经济损失。笔者结合多年的临床实践经验,将奶牛胎衣不下的发病原因及治疗措施简述如下。 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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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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