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1.
通过调查发现,农村许多养鸡专业户(场)在接种鸡新城疫疫苗后仍然发病,分析其主要原因可归纳为疫苗质量、鸡群的状况、免疫方法、饲料品质等四个方面.正确选择保存和运输疫苗的方式、制定科学合理的免疫程序、克服母源抗体的影响、正确使用疫苗、进行免疫监测和不饲喂霉变饲料等一系列措施,可有效防止鸡新城疫免疫失败,达到理想的免疫效果,... 相似文献
2.
防疫在养鸡生产中起着至关重要的作用,免疫质量的好坏和用药效果直接关系到养鸡生产的安全。但实际生产中因鸡群免疫失败和用药原因导致发病的案例还是时有发生,针对这些情况笔者详细调查了养鸡户鸡群疫苗免疫的整个过程和用药情况,发现其中存在着一些突出问题。因此,有必要对养殖户鸡群疫苗免疫过程中存在的问题和用药情况进行一个剖析,以引起广大技术人员的重视,把好鸡群饲养过程中的免疫关、用药关,提高鸡群抗体水平,保障养鸡生产的安全。 相似文献
3.
目前大多数鸡场的免疫效果是好的。但有些鸡场，由于技术水平及其它一些原因，出现免疫失败，给养鸡生产造成损失，现将免疫失败的主要原因归纳如下：1疫苗质量问题疫苗本身不合格，无论你怎样接种，免疫效果都不理想。因此，在购买疫苗时，应选择信誉好，质量可靠的厂家生产的疫苗。2疫苗保管、贮藏、运输不当各种疫苗应保存在低温、阴凉及干燥的场所。不同的疫苗所需要的运输保存条件不同。冻干苗一般需要-13℃以下冷冻保存。湿苗一般在0～5℃保存。油乳剂疫苗的保存温度一般在8℃左右。不用冷藏瓶提取疫苗，或疫苗放置时间过久，超过有效… 相似文献
4.
影响鸡群免疫效果的因素林铁昌（广西自治区南宁养鸡厂南宁５３００３１）鸡群的免疫接种是预防和控制传染病的一项极为重要的措施，但在生产实践中，鸡群接种疫苗后常未能获得满意的免疫效果。造成鸡群免疫失败的原因很复杂，现归纳如下。１疫苗质量的影响疫苗质量不符合... 相似文献
5.
"以防为主,防重于治".防疫是现代养鸡技术中的关键环节.随着农村养鸡业的发展,防疫工作日益受到重视,但是由于人们缺乏科学的免疫知识,往往免疫效果不十分理想甚至失败.本文根据对当地养鸡鸡群免疫效果,着重就造成鸡群免疫失败的原因进行综合分析,现归纳如下,供广大养鸡专业户参考. 相似文献
6.
疫苗接种是预防传染病的有效方法之一,但是免疫接种能否获得成功,受许多因素的影响,接种过疫苗的鸡群不一定都能产生坚强的免疫力。近年来,一些免疫鸡群常常发生传染病,使养鸡生产者蒙受巨大的损失。笔者根据生产实践和调查分析,现就引起鸡群免疫失败的因素及防制对策综述如下: 1 造成免疫失败的因素 1．1 疫苗及稀释剂存在质量问题疫苗来源不正规,疫苗不是正规生物制品厂生产,质量不合格或已 相似文献
7.
“以防为主,防重于治”。防疫是现代养鸡技术中的关键环节。随着集约化养鸡业的发展,防疫工作日益受到重视,但是由于人们缺乏科学的免疫知识,往往免疫效果不十分理想甚至失败。本文根据对当地养鸡场鸡群免疫效果,就造成鸡群免疫失败的原因进行综合分析,现归纳如下,供广大养鸡专 相似文献
8.
(五)防疫因素 在养鸡业中,预防烈性传染病最有效的措施就是对鸡群进行科学的免疫接种。目前,在防疫的实施过程中表现出来的问题主要有以下几点: 1.疫苗质量不过关。疫苗的质量直接关系到免疫程序的免疫效果,由于不同类型的疫苗在保存、运输等方面有不同的严格要求,所以稍有不慎就会使疫苗的质量下降乃至失效。 相似文献
9.
对产蛋鸡免疫失败原因及对策进行论述,其免疫失败原因有:疫苗及稀释剂不合格;鸡群机体状况不适合疫苗接种;疾病因素以及其它因素。其相应对策有:正确选择和使用疫苗;制定合理的免疫程序;采用正确的免疫操作方法,保证免疫质量;建立健全防疫制度全面贯彻综合防治措施,不断提高防疫人员预防操作技能,严格防疫操作规程;做好消毒工作。 相似文献
10.
近年来 ,一些养鸡专业户经常出现这样的疑问 :鸡群经疫苗免疫接种后仍常暴发传染病 ,这对养鸡生产及养殖户造成较大的损失 ,探究其原因如下 :1 疫苗的质量、贮存和运输劣质的疫苗或保管及运输不当均会引起免疫失败。生物制品贮存都有一定的要求 ,应按说明书要求温度保持 ,运输过程中必须防止日光曝晒 ,如夏季远送 ,应采用降温设备 ,尤其是弱毒活疫苗。冬季远送液体制品 (灭活苗、诊断液及血清等 )则应防止冻结。因此要取得免疫接种成功 ,既要保证疫苗的质量 ,又要注意疫苗的保存及运输。2 疫苗的接种方法使用生物制品时 ,应严格按说明书及… 相似文献
11.
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
13.
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
14.
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
15.
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
17.
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
18.
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
19.
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
20.
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
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