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<正>近几年来,B超作为早期妊娠诊断的工具在规模化猪场应用得越来越广泛,但也还有一些规模场、小型养殖场还未认识到B超对于母猪妊娠诊断的重要性,还未充分认识到母猪长期空怀对猪场造成的经济损失。便携式B超在2007年就广泛应用于母猪的妊娠诊断。 相似文献
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目的：运用B超对母驴进行发情鉴定与妊娠诊断,能有效提高鉴定成熟卵泡的准确率、监测早期胚胎着床及发育情况,可以缩短母驴空怀期,提高母驴繁殖率。方法：选择发情期母驴,使用B超进行发情鉴定,确定合适配种时机;选择不同月龄妊娠母驴,应用B超检查,剔除假孕驴,对受孕驴进行怀孕保健。结果：经试用,兽用B超可以协助判定排卵时间,确定配种时机;快速筛查出配种未受孕的母驴,方便进行早期重点干预,提升驴场繁殖效率,增加经济效益。结论：介绍B超在母驴查情与妊娠诊断技术,促进B超在驴场普及应用,具有极大的现实意义。 相似文献
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<正>随着集约化养猪业的发展,母猪早期妊娠诊断对提高母猪繁殖率和养猪场的经济效益方面的作用越来越明显。对母猪妊娠做出及时而准确的判断,可以减少空怀,并对空怀的母猪进行补配,从而减少因无效饲养增加的饲料成本。本文就母猪早期妊娠诊断技术作一概述。1超声波诊断 相似文献
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燕海平 《河南畜牧兽医(综合版)》2014,35(10):22-23
妊娠诊断是母猪繁殖管理上的一项重要内容。配种后，应尽早检出空怀母猪，及时补配，防止空怀。这对于保胎、缩短胎次间隔、提高繁殖力和经济效益具有重要意义。母猪早期妊娠诊断技术方面的研究很多，笔者在此将近年来较成熟、简便，并具有实际应用价值的早期妊娠诊断技术综述如下。 相似文献
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绵、山羊早期妊娠诊断研究进展 总被引：2，自引：0，他引：2
母羊的繁殖力是决定养羊生产效益的“重中之重”，应用生物技术对羊实行早期妊娠诊断．不仅能减少受体羊空怀所造成的经济损失，而且能对妊娠母羊实施合理的饲养和管理；同时也是提高家畜繁殖效率，促进家畜集约化管理．进而提高畜牧业效益的重要技术措施之一。据报道，因为不良或过度饲养可使8％-10％的妊娠母羊受精卵损失。及时准确地 相似文献
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对126头奶牛在配种20～60d进行B超妊娠检查，结果显示20～22d、23～25d两个时间段的诊断准确率比较低，分别是47．62％、76．19％；在26～28d诊断准确率较高，为9048％，诊断怀孕准确率100％，诊断空怀准确率90．91％；29～31d、32～60d诊断准确率均为100％。因此得出中等性能B超早期妊娠诊断的最佳时间段为29～31d。在20～28dB超早期妊娠诊断效果青年牛要好于经产牛。同时，还对B超妊娠诊断的判断标准、注意事项以及B超误诊原因进行了分析讨论。 相似文献
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随着生物工程技术在畜牧业中的运用,布尔山羊的胚胎移植已经走上了产业化的道路.目前,主要是运用超数排卵技术和外科手术移卵来实现,为了便于判断手术后的受体羊是否怀孕.提高羊只的再利用率以及及时对妊娠羊只进行合理饲养管理,我们根据国内外一些报到和自身生产实践引入了B型超声妊娠诊断技术,它是一种无痛苦、无损伤、比较安全的活体诊断方法.虽然这种诊断技术目前最广泛地用于医学疾病的诊断,尤其是在人医上有着普遍的使用,而且在兽医领域也开始应用.随着生物工程研究的深入开展,各学科之间相互渗透愈加明显.在国外,超声诊断技术已较多地应用于哺乳动物胚胎工程和基因工程研究中的妊娠检查、孕期监测、超数排卵等方面.由于超声诊断有实时、直观和可靠性高的特点,以图像记录某些资料更便于以后论证和分析.在转基因动物和胚胎工程研究尤其是目前布尔山羊胚胎移植产业化过程中常常遇到早期妊娠诊断的问题.以往判断动物怀孕与否,常采用徒手触诊或情期观察的方法,不仅其检查者需要娴熟的操作技术和丰富的实践经验,而且诊断的准确性差,常常容易引起流产,必须在妊娠后期胎儿较大时进行,这样就导致了未受孕羊只的再利用率降低,增加生产成本,也不利于妊娠母羊的合理饲管,在产业化过程中有着较多的弊端.为了解决这一问题,我们结合生产实践,采用B型超声诊断仪进行了这方面的研究试验.B超早期妊娠诊断的应用,提供了我们早期对怀孕与空怀羊只的分群饲养的依据,从而做到重点保护,提高繁殖效率以及空怀羊只的重复利用等,提供了饲养空间,减少饲养成本并取得了初步的成效.现将结果报道如下: 相似文献
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Krizsan SJ Nyholm L Nousiainen J Südekum KH Huhtanen P 《Journal of animal science》2012,90(9):3162-3173
The objective of this study was to compare the application of different in vitro and in situ methods in empirical and mechanistic predictions of in vivo OM digestibility (OMD) and their associations to near-infrared reflectance spectroscopy spectra for a variety of forages. Apparent in vivo OMD of silages made from alfalfa (n = 2), corn (n = 9), corn stover (n = 2), grass (n = 11), whole crops of wheat and barley (n = 8) and red clover (n = 7), and fresh alfalfa (n = 1), grass hays (n = 5), and wheat straws (n = 5) had previously been determined in sheep. Concentrations of indigestible NDF (iNDF) in all forage samples were determined by a 288-h ruminal in situ incubation. Gas production of isolated forage NDF was measured by in vitro incubations for 72 h. In vitro pepsin-cellulase OM solubility (OMS) of the forages was determined by a 2-step gravimetric digestion method. Samples were also subjected to a 2-step determination of in vitro OMD based on buffered rumen fluid and pepsin. Further, rumen fluid digestible OM was determined from a single 96-h incubation at 38°C. Digestibility of OM from the in situ and the in vitro incubations was calculated according to published empirical equations, which were either forage specific or general (1 equation for all forages) within method. Indigestible NDF was also used in a mechanistic model to predict OMD. Predictions of OMD were evaluated by residual analysis using the GLM procedure in SAS. In vitro OMS in a general prediction equation of OMD did not display a significant forage-type effect on the residuals (observed - predicted OMD; P = 0.10). Predictions of OMD within forage types were consistent between iNDF and the 2-step in vitro method based on rumen fluid. Root mean square error of OMD was least (0.032) when the prediction was based on a general forage equation of OMS. However, regenerating a simple regression for iNDF by omitting alfalfa and wheat straw reduced the root mean square error of OMD to 0.025. Indigestible NDF in a general forage equation predicted OMD without any bias (P ≥ 0.16), and root mean square error of prediction was smallest among all methods when alfalfa and wheat straw samples were excluded. Our study suggests that compared with the in vitro laboratory methods, iNDF used in forage-specific equations will improve overall predictions of forage in vivo OMD. The in vitro and in situ methods performed equally well in calibrations of iNDF or OMD by near-infrared reflectance spectroscopy. 相似文献
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大庆市羊东毕吸虫病流行病学调查 总被引：1，自引：0，他引：1
对大庆市羊东毕吸虫病的流行病学进行了调查研究。结果表明，大庆有3种东毕吸虫，即程氏东毕吸虫（O.cheni)、土耳其斯坦东毕吸虫（O.turkestanica)和土耳斯坦东毕吸虫结节变种（O.turkestanican var.thuberculata)；中间宿主螺类有1种，即卵萝卜螺；东毕吸虫病在大庆分布很广，所调查的4区2县均有发生，羊东毕吸虫平均感染率分别为50．33％，平均死亡率为21．12％，大庆羊急性病例发病时间为8月上旬至10月下旬，慢性病例为11月上旬至翌年2月中旬。 相似文献
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中国圈养野生动物疫苗使用调查 总被引：1，自引：0，他引：1
2005年对中国动物园协会单位中的18家动物园饲养野生动物疫苗免疫情况进行调查。受调查动物园在野生动物疫苗使用和动物种类方面具有一定的代表性。调查结果显示动物园动物现共使用18类36种疫苗,预防31种疫病。其中哺乳动物使用14类24种疫苗,预防24种疫病;禽类使用4类12种疫苗,预防7种疫病。使用范围最广的有禽流感、犬瘟热疫苗等、新城疫疫苗、猫瘟热疫苗等。共有24目58科动物接种疫苗,其中食肉动物类1目8科,食草动物类3目9科,杂食动物类2目3科,禽类18目38科。研究结果提示应加强动物园之间疫病信息交流、防疫资源的利用、疫病监测和研究,加大对动物园动物疫病的研究投入,逐步建立动物园动物统一的防疫规程。 相似文献
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Information gathered from cases of fowl cholera (FC) in commercial turkey flocks through case records, flock records, and telephone and mail surveys was used to estimate disease costs. The cost to the Georgia commercial turkey industry in 1986 from preventive measures, treatment of outbreaks, and production losses from the disease was estimated at $634,545. The cost of FC per kg of live production was estimated to be $0.015. 相似文献
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猪伪狂犬病是由伪狂病病毒(Pseudorabies virus PRV)引起的急性传染病。其特征是成年猪常为隐性感染，可有流产、死胎、呼吸系统症状，新生仔猪除神经症状外还可侵害消化系统，并伴大批死亡。本病已经给全世界的养猪业造成严重的损失，我国许多地区已报道该病。为进一步探讨该病的控制、净化措施，我们对12个养猪场共856分血清采用美国嗍公司的ELISA试剂盒进行了抗体检测。 相似文献
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W A Vestre 《Modern veterinary practice》1984,65(2):93-97
In 5 cases of glaucoma (2 from trauma, 2 from narrowed drainage angles, 1 secondary to lens extraction), cyclocryotherapy was used to control intraocular pressure. In all cases the intraocular pressure decreased, with the usual result being a cosmetic and painless but blind eye. 相似文献
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Occurrence of MRSA in pigs and in humans involved in pig production--preliminary results of a study in the northwest of Germany 总被引：1，自引：0，他引：1
Meemken D Cuny C Witte W Eichler U Staudt R Blaha T 《DTW. Deutsche tier?rztliche Wochenschrift》2008,115(4):132-139
In 2007, 678 pigs of all age groups out of 347 different farms from Lower Saxony and Northrhine-Westphalia and 86 persons occupationally exposed to pigs were investigated for their nasal colonisation with methicillin-resistant Staphylococcus areus (MRSA) by the Field Station for Epidemiology of the University of Veterinary Medicine Hannover and the Robert Koch-Institute. At the individual animal level, a frequency of positive results of 13% (n = 85 positive animals) and at the herd level, a frequency of positive results of 18% (n = 62 positive herds) were found. All isolates were assigned to the Multilocus Sequence Typing Type ST398. Within MRSA-positive herds, there were more MRSA-negative than MRSA-positive animals. Among the occupationally exposed persons (veterinarians, laboratory personnel and meat inspection personnel), 20 persons (23%) showed a nasal colonisation with MRSA ST398. A quite strong association between the intensity of the contact to pigs with the frequency of nasal colonisation in the occupationally exposed persons was detected. None of the animals or the humans nasally colonised by MRSA ST398 showed any clinical symptoms of a staphylococcal infection. Conclusions are drawn on the herd and intra-herd prevalence of the nasal colonisation of pigs with MRSA ST398 in pigs, but especially on which questions need to be addressed by further research. 相似文献
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为了解西藏拉萨市家禽禽流感抗体水平,2017年8月随机选择免疫过H5禽流感疫苗的8个规模养殖场、2个散养户、3个活禽交易市场,共13个群体,采集1 041份家禽血清样品进行H5、H7、H9亚型禽流感HI抗体检测。结果显示：H5亚型禽流感免疫抗体合格率为45.73%,H7、H9亚型抗体阳性率分别为21.13%、52.64%;养殖场、散养户和活禽交易市场的不同亚型抗体水平存在较大差异,规模化养殖场的H7亚型抗体阳性率最高（29.92%）,活禽市场的H5、H9亚型阳性率最高（78.16%、79.31%）,散养户的所有亚型抗体阳性率均最低。结果表明,拉萨市H5亚型禽流感疫苗免疫效果较差,特别是散养户,疫病发生风险较高,H7、H9亚型疑似自然感染率较高,应进一步查明原因,及时采取相应的措施,防止疫情发生。 相似文献