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1.
《中国动物传染病学报》2016,(1)
为了解湖北省规模化蛋鸡场H9N2亚型禽流感疫苗的免疫效果,本研究在2014年1月至12月从湖北省13个地区选择不同规模化蛋鸡场,随机采集蛋鸡血样2189份,用血凝抑制(hemagglutination inhibition,HI)试验测定了H9N2亚型禽流感抗体滴度。对样本检测结果进行统计与分析显示,1月份到5月份样本HI抗体滴度平均值呈上升趋势,1月份检测的样本抗体滴度最低,为9.26log2,5月份检测的样本抗体滴度最高,为12.34log2。13个不同地区样本抗体滴度存在一定的差异,抗体滴度最低地区的平均值为5.76log2,滴度最高地区为11.58log2。对不同日龄蛋鸡样本检测结果分析显示,随着日龄增长,样本平均抗体滴度值呈现逐渐上升趋势,蛋鸡日龄≤120 d的样本抗体滴度平均值最低,为10.21log2,300日龄以上的蛋鸡样本抗体滴度平均值最高,为11.31log2。检测结果表明,湖北省规模化蛋鸡场H9N2亚型禽流感的平均抗体滴度值水平总体良好,合格率和优秀率较高,但不同地区、不同日龄和不同月份蛋鸡H9N2亚型禽流感抗体存在差异。 相似文献
2.
《动物医学进展》2015,(9)
2013年6月~12月对湖北省10个养殖集中区域的规模化蛋鸡养殖场随机采集血样1 631份,应用血凝抑制试验(HI)检测H9亚型禽流感抗体。对不同月份送检样本分析显示,10月份H9亚型禽流感平均抗体滴度最高(9.44log2),8月平均抗体滴度最低(8.71log2)。对不同地区送检样本分析显示,H9亚型禽流感抗体滴度平均值最低的为沙洋(7.94log2),最高的是浠水(9.88log2)。蛋鸡日龄小于等于105d的样本平均抗体滴度值最低(9.08log2),随着日龄的不断上长,抗体平均滴度值不断上升;在蛋鸡日龄在105~200之间,部分鸡群抗体滴度值小于4log2,并且存在抗体滴度离散度大,差异较大的特点。检测结果显示,不同时间、不同区域和不同日龄的鸡群H9亚型禽流感疫苗免疫后抗体滴度呈现一定的差异,可能的原因是各地区鸡场存在免疫操作不规范、免疫程序不合理的现象,值得引起警示。 相似文献
3.
《畜牧兽医科技信息》2018,(12)
选取三个规模蛋鸡场各2个批次的鸡群,将每一批鸡对半分成试验组和对照组,给予不同的免疫程序,每个鸡场每月采取100份血样(试验组和对照组各50份),对新城疫抗体进行监测,连续采样监测18个月,共监测样品1800份。新城疫抗体监测结果:对照组在5日龄首免,12日龄二免,60日龄强化免疫,60日龄前免疫抗体已降到4log2以下,出现了免疫空白期。实验组在7日龄进行新城疫首免,28日龄二免,60日龄左右强化,育成期抗体监测比对照组高出1个滴度以上,且能保护整个育雏期和育成期。110日龄以后实验组每两个月用新城疫Ⅳ系苗饮水一次,相对对照组每3～4个月加强免疫,平均抗体效价可维持在5log2以上,保护力加强。 相似文献
4.
为探究雏鸭重组禽流感(H5+H7)三价灭活苗母源抗体消长规律,确定最佳首免日龄,将试验分为A组(种鸭免疫H5N1 Re-11+Re-12株、H7N9 H7-Re-2株、H5N2疫苗)和B组(种鸭免疫H5N2 rSD57株+rFJ56株、H7N9 rGD76株疫苗);选其孵化后的雏鸭各300羽,分别于1、7、14、21、28日龄时采血,每组随机采集100份样品,通过血凝(HA)和血凝抑制(HI)试验进行禽流感母源抗体检测。结果显示:两组各亚型母源抗体在1日龄时平均滴度均达最高水平( 7.27log2),且离散程度低( 0.22)。两组雏鸭的禽流感母源抗体阳性率均随日龄增长而逐渐下降,7日龄时,平均滴度在4.26log2以上,群体抗体阳性率在76%以上,其中B组阳性率略高于A组;14日龄时,平均滴度都下降到2.55log2以下,群体抗体阳性率下降到25%以下;21日龄时,平均滴度均在0.43log2以下,群体抗体阳性率下降至1%以下。结果表明,高抗体水平种鸭能够使后代雏鸭具有较高水平的禽流感母源抗体,但母源抗体保护时间较短,重组禽流感(H5+H7)三价灭活苗的最佳首免时间为7～14日龄。本研究为鸭禽流感疫苗免疫策略制定提供了参考。 相似文献
5.
将鸡新城疫La Sota株病毒接种于含有不同水平新城疫母源HI抗体的鸡胚中。在不同的孵化条件下孵育。测定母源抗体及孵化条件对病毒增殖的影响.结果表明,当免疫鸡胚的平均母源HI抗体为7.48log2时,平均病毒增殖滴度为10×7.32log2;而非免疫鸡胚平均母源HI抗体为2.55log_2(2.4～2.7log2)时,病毒增殖滴度平均可达10×8.25log_2。尽管后者比前者略高。但在统计学上无显著性差异.鸡胚接种后84～88小时病毒增殖滴度达到最高水平。在种毒1:40～1:200的稀释范围内,病毒的增殖滴度无明显影响. 相似文献
6.
《当代畜牧》2017,(33)
笔者跟踪监测了肉仔鸡母源抗体。结果表明,在2 d时母源抗体水平较高,集中在6log2~9log2,平均抗体滴度为7.10,抗体阳性率为100%;在8d时母源抗体水平集中在4log2~7log2,平均抗体滴度为5.70,抗体阳性率为100%;在17d时母源抗体水平主要集中在2log2~5log2,平均抗体滴度为3.19,抗体阳性率为42.31%;在24 d~37 d的3次检测结果,母源抗体水平均为≤2log2,平均抗体滴度分别为0.47、0.13和0,抗体阳性率均为0%;跟踪检测抗体的下降具有明显的线性关系。通过监测数据分析,该场雏鸡14日龄左右是最佳的AIV H5N1 Re-6免疫日龄。 相似文献
7.
《中国动物传染病学报》2015,(6)
禽流感(avian infl uenza,AI)是由A型流感病毒(Avian infl uenza virus,AIV)感染禽类引起的一种从呼吸系统到全身严重败血症等多种症状的高度接触性传染病。目前,对我国家禽产业危害最大的高致病性禽流感病毒是H5禽流感病毒,几乎所有的规模化蛋鸡场都进行了H5禽流感疫苗的预防接种。为了解湖北省规模化蛋鸡场H5N1 Re-6亚型疫苗免疫后抗体滴度,本研究于2014年1~12月期间在湖北省13个地区选择不同规模化蛋鸡场,随机采集2079份蛋鸡血样,用血凝抑制(hemagglutination inhibition,HI)实验检测了H5N1 Re-6亚型禽流感抗体,并对测定结果进行了统计与分析。结果显示,规模化蛋鸡场H5N1 Re-6亚型抗体滴度在6 log2以上的样品数占89.2%,能够保护鸡群抵抗同型病毒的感染。但H5N1 Re-6亚型禽流感抗体滴度整体不高,且仍有少量地区H5N1 Re-6亚型禽流感免疫合格率为60%~80%,提示部分鸡群一旦感染该型病毒,仍然存在发病的危险。 相似文献
8.
吕梁地区某大型种鸡场的海兰褐父母代种鸡注射H5亚型禽流感油乳剂灭活苗后,其孵出的雏鸡随机抽取一部分,检测HI抗体效价。结果显示：H5亚型Re-5株抗体平均效价1日龄为7.40log2,5log2以上一直持续到20日龄,抗体滴度呈缓慢下降;H5亚型Re-4株抗体平均效价1日龄为6.83log2,13日龄为4.90log2,抗体滴度下降相对较快,本试验旨在绘制H5亚型禽流感母源抗体消长曲线,为商品蛋鸡禽流感的首免日龄提供参考依据。 相似文献
9.
吕梁地区某大型种鸡场的海兰褐父母代种鸡注射H5亚型禽流感油乳剂灭活苗后,其孵出的雏鸡随机抽取一部分,检测HI抗体效价。结果显示:H5亚型Re-5株抗体平均效价1日龄为7.40log2,5log2以上一直持续到20日龄,抗体滴度呈缓慢下降;H5亚型Re-4株抗体平均效价1日龄为6.83log2,13日龄为4.90log2,抗体滴度下降相对较快,本试验旨在绘制H5亚型禽流感母源抗体消长曲线,为商品蛋鸡禽流感的首免日龄提供参考依据。 相似文献
10.
本研究采集了上海地区规模化蛋鸡场、林地散养鸡场、种山鸡场的健康产蛋鸡群共240份血清,进行了鸡毒支原体感染抗体的ELISA血清学检测。结果显示,规模化蛋鸡场和林地散养蛋鸡场鸡毒支原体感染抗体平均阳性率分别为97.8%和93.3%,两种饲养模式的鸡群鸡毒支原体感染率都很高,两者无显著差别;3个种山鸡场检测结果差异较大,分别为100%、0、30%,说明种山鸡对鸡毒支原体的感染并不普遍;对规模化肉鸡场鸡群鸡毒支原体抗体跟踪结果表明,在65日龄时鸡毒支原体在鸡群中已经存在,65~90日龄期间鸡群普遍感染鸡毒支原体,肉鸡上市前感染抗体阳性率达到94%。结果表明,产蛋鸡群鸡毒支原体感染情况与饲养方式没有相关性,均呈现较高阳性率,种山鸡感染并不普遍,肉鸡群感染鸡毒支原体高峰期在65~90日龄之间,预防鸡毒支原体病的最佳日龄应在30~60日龄之间。 相似文献
11.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(9):324-328
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).
Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.
相似文献12.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(6):504-508
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
13.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(10):323-327
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.
Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.
相似文献14.
15.
Slocombe JO Villeneuve A 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(10):630-633
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
16.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.
Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.
相似文献17.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(8):641-646
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
18.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):491-495
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).
Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.
相似文献19.
20.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1984,25(9):347-350
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.
Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.
相似文献