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《国外畜牧学(猪与禽)》2015,(5)
<正>上世纪末和本世纪初,当时国内很多猪场都未进行伪狂犬病的免疫,造成猪群对伪狂犬病的防疫力薄弱,许多猪场暴发了伪狂犬病疫情,疫情症状主要是母猪流产,仔猪出现神经症状,腹泻伴随高死亡率等。大约在2005年,大多猪场都已经开始实施免疫,并且第一波的暴发疫情也已渡过。当时发现,伪狂犬病严重发病的猪场很少,但问题并没有根除,事实上,那时的伪狂犬病已经进入散发状况。临床上, 相似文献
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猪伪狂犬病是危害规模化养猪场的主要传染病之一,为了解河南新乡某规模化猪场猪伪狂犬病(PR)的防控情况,对猪场内的健康猪群进行猪伪狂犬病gE基因缺失疫苗免疫,采用酶联免疫吸附试验(ELISA)对免疫猪群体内的猪伪狂犬病gE抗体水平进行检测分析。由试验得出,母猪妊娠初期猪伪狂犬病gE抗体阳性率为90%,妊娠中期和后期达到100%;哺乳期仔猪也达到了100%;5～6周龄保育猪伪狂犬病gE抗体阳性率为70%;7～8周龄保育猪抗体阳性率为50%;9～10周育肥猪抗体阳性率为40%。由试验可知,该猪场母猪妊娠期和哺乳斯感染猪伪狂犬病毒严重,保育期猪只疫情逐渐减少,育肥期疫情得到有效控制。建议长期检测猪伪狂犬病抗体,逐步淘汰阳性母猪,培养阴性后备猪群。对规模化猪场进行猪伪狂犬病抗体水平检测,可以更好地了解猪场的免疫效果,对促进养猪场经济平稳运行有积极作用。 相似文献
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猪瘟及猪伪狂犬病一直是规模化猪场传染病防制的重点。从一规模化猪场免疫猪群发生猪瘟（温和型）和猪伪狂犬病的诊断及防治谈起,探讨了在当前各类疫病高发及混和感染频发的情况下,如何采取相关的综合防治措施,扑灭疫情,将猪场损失降至最低点,及时调整和完善猪场免疫程序,提高猪场经济效益。 相似文献
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正1流行现状2012年春,河南、河北、山东等地许多猪场暴发猪伪狂犬病疫情,并从猪场送检病料中分离、鉴定出猪伪狂犬病致病毒株。如今,该疫情已蔓延至南方各省,部分猪场在进行伪狂犬病g E抗体检测时,发现其阳性率升高,有的甚至接近100%。具体情况如下。1.1大部分发病场猪群出现典型的伪狂犬病临床症状,g E抗体阳性率接近100%;部分猪场仅发现 相似文献
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２００１年６～７月开始，我市部分生猪出现伪狂犬病兰耳病并发现象现报告如下。１发病情况２００１年６～７月前，经查本市绝大多数猪场均已按规定对猪瘟、乙脑、细小病毒等主要疫病进行免疫。根据当时实验室诊断结果，认为２００１年６～７月间猪的主要疫病为猪伪狂犬病，个别场有弓浆虫病可疑，基本排除猪附红细胞体病。因此，对猪伪狂犬、衣原体阳性猪场采取紧急免疫接种，继而结合相应药物治疗，疫情得到了相应的控制。由于当时检测本地“兰耳病”（PRRS）曾经为阴性，未对该病引起足够的重视。２００１年１２月初，某场又暴发疫情（… 相似文献
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2015年山东省烟台市某免疫伪狂犬病疫苗Bartha-K61猪场暴发疑似伪狂犬病疫情,临床表现为妊娠母猪繁殖障碍,仔猪神经症状。脑组织病料样品接种BHK21细胞,分离获得1株伪狂犬病病毒(PRV),命名为PRV-YT株。该病毒株gE基因与JS-2012、HN1201和ZJ01株序列同源性为99.4%～99.8%,且位于同一遗传进化分支。选择70日龄PRV阴性健康猪接种PRV-YT株,发病率和死亡率均达100%(5/5),均表现严重脑组织、肝脏与肺脏损伤,表明PRV-YT株为猪伪狂犬病病毒变异强毒株。本研究为制定猪伪狂犬病防控方案提供了重要基础。 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