共查询到20条相似文献，搜索用时 625 毫秒
1.
肌注缩宫素促进产后乳牛胎衣脱落探讨 总被引：2，自引：0，他引：2
据报道，胎衣不下的母牛８８％以上发生子宫炎。过去，本场对产后母牛曾用肌注脑下垂体后叶素，来防治乳牛胎衣不下，并取得显著效果。因脑垂体后叶素价格昂贵。本文探讨用缩宫素防治乳牛胎衣不下，现报道如下：１材料与方法１．１试验牛选择本文把１９９２年以来未使用药物防治的母牛８９头作为对照组，选择１９９４年使用脑垂体后叶素防治胎衣不下母牛６８头为试验１组，选择１９９８年以来本场使用缩宫素防治的母牛１４６头作为试验２组。１．２药剂脑垂体后叶素针剂：市售，缩宫素：市售针剂（１０u／ml）。１．３用药方法试验组牛群不… 相似文献
2.
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
3.
奶牛产后，胎衣在12 h内不能自然完全脱落下来称胎衣不下（Retention Fetal Membrane，简称RFM）。有资料显示，奶牛胎衣不下的发病率通常在10%～25%，有的奶牛合作社为30％～40％，夏季可高达60％[1]。高清友等[2]研究报道，在717头分娩奶牛中有148头发生产后胎衣不下，发病率为21％。靳国旺等[3]于2007-2011年间，对安阳地区奶牛场的奶牛胎衣不下病例进行了统计分析，结果发现在856头分娩奶牛中，有188头在产后发生了胎衣不下，发病率22%。该病作为奶牛产后常发、多发病之一，在导致奶牛产奶量下降的同时，可继发子宫内膜炎，造成繁殖障碍，导致奶牛因不孕而被提前淘汰，使奶牛养殖业遭受经济损失。 相似文献
4.
李生荣 《青海畜牧兽医杂志》2001,31(4):18-18
根据本场１９９８～２００１年，所产１４８头次奶牛的统计，奶牛发生胎衣不下的有２５头次，胎衣不下率为１７％。对胎衣不下的奶牛如处理不当或不及时，则易继发子宫内膜炎，从而造成奶牛不孕，最终被淘汰，本场对胎衣不下的奶牛，根据不同情况，采取了不同的治疗方法，得到了良好的效果。１ 常用的治疗方法１．１ 胎衣容易剥离时，可用手术剥离，剥离后用土霉素５ｇ加生理盐水５００ｍｌ，一次宫内注入，同时肌肉注射催产素５０单位，每日一次，连用２～３次，有体温升高症状者，可进行全身治疗：青霉素９６０万ＩＵ，链霉素６００… 相似文献
5.
奶牛胎衣不下的研究现状 总被引：13，自引：0，他引：13
奶牛胎衣不下的研究现状＊杨玉成（河北省张家口农业专科学校宣化０７５１３１）胎衣不下是奶牛分娩时的常见病。据报道，西安市第二奶牛场１９８７～１９８８年间奶牛的发病率为４１．６０％〔１〕。康承伦综合９市２６个奶牛场的调查资料，统计了产犊牛８１２４头，其中... 相似文献
6.
孙永泰 《江西畜牧兽医杂志》2003,(2):8-8
防治奶牛子宫内膜炎是提高产后受孕率的关键措施。治疗奶牛子宫内膜炎通常是在奶牛产后１４～１５d第１次向子宫内投药，以后根据阴道内流出的炎性分泌物的性质，继续治疗，直至痊愈。为了进一步提高奶牛子宫内膜炎的防治效果，笔者近期进行了奶牛产后早期使用不同药物，投入子宫内的防治试验。１材料和方法１．１供试奶牛及分组将１９９６年７～１０月分娩的患有子宫内膜炎的母牛随机分为A、B、C、D４个组，每组３０头，其中产后胎衣不下实施手术剥离的奶牛，随机均分搭配于各组。１．２药物及方法A组：０．５％黄色素４０mL，用原料药… 相似文献
7.
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
8.
子宫灌注戊酸雌二醇治疗奶牛胎衣不下诊疗报告刘厚渊新疆巴州畜牧技术推广中心（８４１０００）产后１２小时胎衣未排出，即为胎衣不下。因胎衣不下多引起子宫内膜炎而导致不孕，是奶牛常见病之一。本病给牛的繁殖，尤其是奶牛业的发展，造成了很大的影响。过去胎衣不下多... 相似文献
9.
奶牛胎衣不下的发病原因和防治措施 总被引：1，自引：0，他引：1
杨前锋 《河南畜牧兽医(综合版)》2008,29(5):29-29
奶牛分娩后12小时内不能将胎衣自然排出的,称为胎衣不下或胎衣滞留。胎衣不下是奶牛的一种常见疾病,常引起子宫内膜炎,直接影响到奶牛的正常受孕和产奶,甚至会继发其他疾病,危及生命,给奶牛场带来巨大的经济损伤。奶牛胎衣不下的发病率约占分娩牛的8．2％,有些奶牛场甚至高达25％～40％。对此,笔者在2003-2007年间,对安阳地区及周边县区奶牛场的奶牛胎衣不下病例进行统计分析,共有856头奶牛分娩,有胎衣不下现象的有188头,发病率为22％。 相似文献
10.
胎衣不下是指母畜产后24小时胎衣不能正常排出体外,是奶牛产后常见病之一.该病可导致奶牛子宫内膜炎的发生,从而增加奶牛空怀天数,严重者由于不孕而致淘汰,直接影响奶牛场的经济效益.现就本场近年来奶牛胎衣不下的发生原因及采取的防治措施叙述如下. 相似文献
11.
12.
13.
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
14.
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
15.
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
16.
17.
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
18.
乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献
19.
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