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为了解H5亚型禽流感Re-4毒株疫苗免疫效果,采用血凝-血凝抑制试验(HA-HI)方法对16个县区102个规模场/散养户送检的1621份鸡血清,进行H5亚型禽流感Re-4毒株免疫抗体检测。结果:Re-4毒株免疫血清抗体合格率为72.9%(抗体滴度≥5log2),Re-4毒株免疫抗体合格率高于50%的蛋鸡场户占80.4%,免疫抗体滴度≥7log2的血清份数占合格数的76.2%;发生过H5亚型禽流感疫情和疑似H5亚型禽流感疫情地区的17个养鸡场户,鸡群抗体滴度≥7log2的血清比例占到免疫合格数90%以上。 相似文献
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《养殖与饲料．饲料世界》2021,(8)
为评估2018-2020年贵州省黔南州H5亚型禽流感疫苗强制免疫效果,每年随机采集黔南州种禽场、商品场和散养户的鸡、鸭、鹅等家禽血清样品,通过禽流感血凝及血凝抑制试验方法,进行免疫抗体检测。检测结果为:2018-2020年全州H5亚型禽流感群体免疫抗体合格率都在85%以上,表明近3年黔南州H5亚型禽流感强制免疫效果较好。在不同养殖规模上,每年种禽场、商品场和散养户群体免疫抗体合格率都在85%以上,每年鸡、鸭、鹅等4类家禽群体免疫抗体合格率都在80%以上。建议部分中小规模养殖场结合实际情况优化免疫程序。 相似文献
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本研究自2013年起至2015年底,对湘西州8个县市的禽类进行了H5亚型禽流感免疫抗体水平的监测.共采集了规模禽场和散养户的禽血清11216份,其中鸡血清9261份、鸭血清1866份、鹅血清89份.并利用血凝-血凝抑制试验对这些样品进行免疫抗体的检测,整体的免疫合格率达到86.9%.从监测结果来看H5亚型禽流感的免疫抗体合格率在逐年上升.为了掌握湘西自治州高致病性禽流感免疫抗体水平的情况、及时发现疫苗免疫的漏洞,为湘西州高致病性禽流感的防控提供科学决策的依据. 相似文献
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2017—2021年,每年春、秋两季在湖南省14个市州,随机抽取规模养禽场采集血清样品,采用血凝与血凝抑制试验,进行高致病性禽流感免疫抗体检测,并对检测数据进行统计和回归分析。结果显示：湖南省规模养禽场H5亚型禽流感免疫抗体个体合格率和场合格率分别为93.75%和93.25%,H7亚型免疫抗体个体合格率和场合格率分别为80.62%和79.49%;不同禽种H5和H7亚型禽流感免疫抗体个体合格率和场合格率由高到低均为养鸡场、养鸭场、养鹅场;秋季规模养禽场H5和H7亚型禽流感免疫抗体个体合格率和H7亚型免疫抗体场合格率均高于春季;不同地区间个体合格率存在差异;H5亚型禽流感免疫抗体个体合格率与场合格率之间不存在线性回归关系,而H7亚型免疫抗体个体合格率与场合格率之间存在线性回归关系。本研究为科学开展高致病性禽流感免疫效果评估和制定高致病性禽流感防控政策提供了参考。 相似文献
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为了研究湘西自治州规模化鸭场的高致病性禽流感的免疫情况和潜在的感染风险,笔者于2008年从湘西自治州各县市采集了规模化鸭场血清标本共480份,采用血凝试验和血凝抑制试验对4个免疫了H5亚型禽流感病毒灭活疫苗的规模化鸭场的不同日龄家鸭进行了H5和H7亚型禽流感病毒抗体的检测。结果表明:4个规模化鸭场H5亚型禽流感病毒抗体合格率分别为65.56%(59/90)、67.78%(61/90)、53.33%(48/90)、47.78%(43/90),说明规模化鸭场的H5亚型免疫抗体水平还有待提高,以对家鸭提供确实的保护;H7亚型禽流感病毒抗体阳性率为0,规模化鸭场没有H7亚型禽流感病毒感染。 相似文献
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2014—2015年,随机从安徽省16个地市、2个直管县的部分种禽场、商品代饲养场、村散养户、交易市场采集家禽血清样品18 286份,其中鸡血清13 788份、鸭血清3 422份、鹅血清1 076份,采用血凝和血凝抑制试验检测H5亚型禽流感免疫抗体。结果显示,H5亚型禽流感免疫抗体平均合格率为82.45%,其中鸡血清合格率为84.38%、鸭血清合格率为74.99%、鹅血清合格率为81.41%;种禽、规模场商品禽、散养禽、交易市场禽的免疫抗体合格率分别为95.25%、84.32%、77.70%、70.19%。结果表明,安徽省H5亚型禽流感总体免疫效果较好,免疫抗体合格率达到了农业部规定的70%的标准,但交易市场的家禽免疫抗体合格率较低,应加强对交易市场家禽的检疫。 相似文献
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为了切实了解岑巩县家禽高致病性禽流感的免疫效果,为禽流感的防控工作提供参考依据,随机抽取岑巩县家禽血清样品480份对禽流感免疫抗体进行血凝抑制试验检测。结果:高致病性禽流感H5亚型的总体免疫抗体合格率为80.42%(386/480),达到农业农村部规定的≥70%要求;高致病性禽流感H7亚型的总体免疫抗体合格率为40.63%(195/480),散养户和个别规模场未达到农业农村部规定的要求。 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