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1.
采集119份流产母羊和随机抽检81份母羊血清,作布氏试管凝集和衣原体间接血凝试验诊断。在流产母羊血清中,两试验的阳性率分别为59.66％(71/119),23.53％(28/119);在布病SAT的阳性羊内,混感衣原体病的阳性率为23.94％;在衣原体IHA的阳性羊内,混感布病的阳性率为60.71％。在随机抽检母羊血清中,两试验的阳性率分别为2.47％(2/81),18.52％(15/81);在布病SAT的阳性羊内,混感衣原体病的阳性率为50％;在衣原体IHA的阳性羊内,混感布病的阳性率为6.67％。试验证明,在流产严重羊群中,布病为第一致病因素;当布病接近控制时,衣原体又是第一致病因素。 相似文献
2.
互县县北山地区山羊流产病流行比较严重，据调查，该地区山羊平均流产效率为４４．２％，经血清学检测，衣原体和弓形体的感染率分别为３０．２％和３２．６％，针对衣原体这一病因，应用羊衣原体灭活苗，于母羊怀孕前或后１个月，分皮下（３ｍｌ）和后海穴（１ｍｌ）两种免疫途径，进行了田间免疫试验并对比观察，结果：注苗免疫羊流产率由预防前的４４．２％下降至２９．５６％下降了１４．６５个百分点；与对照组羊比较下降了１４ 相似文献
3.
羊衣原体性流产(羊地方性流产)流行于近50个国家,成为引起母羊流产的主要病原之一。对本病的预防,主要采用疫苗的免疫接种,并应用一些实用技术检测疫苗效力。本文就我们研制的羊流产衣原体卵囊黄甲醛灭活油佐剂苗进行较大规模田间免疫试验,并通过数理统计来评价该苗在不同地区的预防效果,用以衡量疫苗的免疫效果。 相似文献
4.
针对红河州山羊妊娠期流产严重的现象，进行了流行病学调查、临床症状观察、病理学检查、实验室诊断、人工感染试验和治疗试验。结果发现，妊娠母山羊流产现象覆盖全州，且流产率以每年11．50％的速度递增，弓形虫抗体阳性率为30．82％(1210／3925)，衣原体抗体阳性率为32．31％(1268／3925)，其中弓形虫和衣原体双重感染阳性羊占9．35％(367／3925)，未检出布鲁氏菌抗体阳性羊；自流产胎儿肺抹片中发现弓形虫滋养体包囊，7份流产胎儿中有6份分离到衣原体；用土霉素及复方新诺明治疗有明显效果；人工感染试验能复制出与自然病例相同的病例模型。调查结果表明，红河州广泛流行的山羊妊娠期流产的病原是弓形虫、衣原体，2种病原单一感染或混合感染是造成流产的主要原因。 相似文献
5.
用羊衣原体灭活苗经后海穴注射免疫山羊，第１５天有２／４检出血清抗体，且滴度较低，至第７５天血清抗体达到高蜂，一直维持到１１３天；皮下注射免疫的山羊血清抗体虽出现较早，但在后期的抗滴度和低于后海穴注射免疫组。对初怀孕绵羊和山羊用灭活菌后海裕注射免疫后，在怀孕后期用羊衣原体强毒攻击，均获完全保护。田间试验中后海穴注射免疫羊１３０２０只，皮下注射免疫羊４０７８只，另设对照羊３１５１只，经一个产羔季节观察 相似文献
6.
针对牛羊亚洲I型口蹄疫灭活苗免疫效果与安全性，在重庆市武隆县开展了该疫苗的有关试验。抽检的20份牛血清样品中，亚洲I型口蹄疫抗体阳性20份，阴性0份，抗体阳性率达100％；抽检的20份羊血清样品中，亚洲I型口蹄疫抗体阳性18份，阴性2份，抗体阳性率90％。血清抗体阳性率是反应疫苗免疫后群体抗体状态的一个重要数据，群体血清抗体阳性率越高，维持时间越长，说明疫苗免疫效果越好，本次试验结果就说明该疫苗免疫效果好，值得推广。 相似文献
7.
据以往的调查研究资料证实:茶卡公社羊布氏杆菌病的感染率为19.54％。1971年以后,连续多年用羊型M5号弱毒菌苗进行气雾免疫,到1983年为止,我们从布氏杆菌血清学检查和细菌分离的结果证明:茶卡公社抽检羊只的布病血检率已降低到1.34％,在流产胎儿中,经过多年检验未分出布氏杆菌及其它能致羊发生流产的病原细菌。但是近年来,牛羊的流产仍在发生,个别羊群的流产危害比用M5号苗气雾免疫前的71年还要严重。为了明确当前羊只流产的主要原因,我们于1983年4月在茶卡公社收集流产胎儿10例,作了流产病原的细菌及羊流产衣原体的分离,在10例病料中未均培养出病原细 相似文献
8.
通过抽检小反刍兽疫疫苗免疫后的部分羊群,分别于免疫后的7、14、21、28 d对免疫羊进行抗体及病毒核酸（包括疫苗毒）跟踪监测,并对监测数据进行整理比对分析,继而掌握小反刍兽疫免疫抗体在机体内的消长规律及影响因素,进一步了解该疫苗辽宁省羊群中的免疫效果及安全性。结果表明,该疫苗在免疫7d后,免疫群体均能够达到免疫合格率高于70%的标准,且未出现疫苗排毒现象,证明该疫苗的免疫效果确实、安全性好。 相似文献
9.
布氏杆菌病、衣原体病,在我州各县均有不同程度的流行,直接影响畜牧业生产的发展。如乌兰县在六十至七十年代,布氏杆菌检疫时的感染率牛为38.44％,羊19.54％,经过多年连续气雾免疫工作,到1983年检疫牛感染率降为2.78％,羊感染率降为0.66％。衣原体从1980年开始检疫牛感染率为4.72％,羊感染率为13.13％。这说明布氏杆菌经过多年连续气雾免疫有一定成效,可以得到控制。相反衣原体病引起牛羊流产却逐步上升,对此应予重视。 1965年德令哈农场,布氏杆菌检疫时抽检生产母畜50％以上,牛感染率不超过5％,猪不超过7—8％。为了进一步调查本病的消长及危害程度,我们对布氏杆菌病及牛、猪衣 相似文献
10.
流产衣原体(Chlamydia abortus)属于衣原体科(Chlamydiaceae)、衣原体属(Chlamydia),系一类细胞内寄生的革兰阴性原核型微生物。流产衣原体导致羊的流产、死胎,严重威胁养羊业。流产衣原体不仅可以感染羊,还可以感染怀孕妇女。在病原的诊断方面,分子生物学技术因其快速与相对灵敏性的优点得到快速发展,然而细胞分离培养仍然是鉴定流产衣原体的"金标准"。在防治方面,疫苗免疫是预防流产衣原体的理想措施,在我国流产衣原体灭活疫苗已获得国家一类新兽药证书并可以为羊提供有效地免疫保护。疫苗与抗菌药物的合理使用可以为羊群提供很好的保护。 相似文献
11.
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.
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.
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
15.
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.
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.
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
20.
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
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