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1.
为调查吉林省部分地区蜱虫和羊体内羊泰勒虫和嗜吞噬细胞无浆体的流行情况，本试验采用PCR方法对采自吉林省5个地区的340份羊血液样本和841份蜱虫样本进行检测，并对部分阳性样本测序，建立系统发育树。结果显示，蜱虫中羊泰勒虫和嗜吞噬细胞无浆体阳性率分别为4.64%(39/841)和7.13%(60/841);羊血液样本中羊泰勒虫和嗜吞噬细胞无浆体阳性率分别17.06%(58/340)和10.00%(34/340),混合感染率为3.24%(11/340)。蜱虫和羊血液样本中感染的羊泰勒虫为吕氏泰勒虫单独感染，未检测到尤氏泰勒虫和绵羊泰勒虫。系统发育树分析显示，蜱虫和羊血液样本中检测到的泰勒虫与吕氏泰勒虫处于同一分支，与吕氏泰勒虫河南株亲缘关系较近，与尤氏泰勒虫、绵羊泰勒虫亲缘关系较远；蜱虫和羊血液样本中检测到的嗜吞噬细胞无浆体与韩国株、俄罗斯株处于同一分支，亲缘关系较近。结果表明，吉林省羊泰勒虫和嗜吞噬细胞无浆体感染普遍存在。本调查结果为吉林省羊泰勒虫病和嗜吞噬细胞无浆体病的综合防治提供了理论依据。 相似文献
2.
为了解羊泰勒虫病在吉林省珲春地区流行情况,本试验应用PCR方法对珲春地区130份羊的血液样本进行了羊泰勒虫病的流行病学调查,并与血液涂片染色镜检法进行了比较。结果该地区羊泰勒虫病的PCR方法检测阳性率为29.23%,而血涂片染色镜检法的阳性率为15.38%。不同牧地,不同年龄和不同品种间的感染率则无显著差异。通过调查表明,吉林省珲春地区是羊泰勒虫病的流行地区。 相似文献
3.
为了解四川省甘孜藏族自治州九龙县牦牛无形体病的感染情况,本试验以该地2个镇作为样品采集点,通过无菌操作技术采集牦牛血液样本,使用PCR法检测牦牛无形体病的流行情况.结果显示,收集到的29份样本中共检测出20份阳性样品,总阳性率为68.97％(20/29),牛无形体、中央无形体和嗜吞噬细胞无形体的感染率分别为48.28％... 相似文献
4.
本研究用血液涂片检查结合聚合酶链式反应(PCR)对潍坊市104头奶牛血液样品进行了牛泰勒虫病的初步调查。结果显示该市泰勒虫血液涂片染色阳性率为15.4%,PCR检测瑟氏泰勒虫阳性率为8.7%,环形泰勒虫阳性率为20.2%,表明潍坊市牛泰勒虫病感染率较高。本研究为该地区牛泰勒虫病的综合防治提供了数据参考。 相似文献
5.
为建立一种能快速对羊泰勒虫（ovine and caprine theileria）和嗜吞噬细胞无浆体（A. phagocytoph-ilum）同时进行检测的双重PCR方法。根据GenBank已报道的羊泰勒虫MPSP基因和羊嗜吞噬细胞无浆体16S rRNA基因设计合成了2对特异性引物,通过条件优化,建立了双重PCR检测方法。双重PCR可特异扩增出羊泰勒虫和嗜吞噬细胞无浆体目的条带,片段大小分别为875bp和394bp。该方法具有较好的特异性,对羊泰勒虫和嗜吞噬细胞无浆体的最低检出浓度为16fg/μL和1fg/μL。对采集的60份血液样本进行双重PCR检测,羊泰勒虫阳性率为46.67%(28/60),嗜吞噬细胞无浆体阳性率为13.33%(8/60),混合感染率为10%(6/60)。结果表明,双重PCR方法可用于羊泰勒虫和嗜吞噬细胞无浆体的快速诊断和流行病学调查。 相似文献
6.
为了解牛卵形巴贝斯虫病在吉林省延边地区流行情况,本试验应用PCR方法对珲春地区190份牛的血液样本进行牛巴贝斯虫病的分子流行病学调查,并与血液涂片染色镜检法进行了比较。结果该地区牛巴贝斯虫病的PCR方法检测阳性率为30.52%,而血涂片染色镜检法的阳性率为11.05%。不同地区和不同饲养方式间牛卵形巴贝斯虫感染率差异显著(P<0.05)。遗传进化分析显示,吉林省延边地区牛卵形巴贝斯虫与日本分离株处于同一分支,而区别于河南和韩国分离株。调查表明,吉林省延边地区是牛卵形巴贝斯虫病的流行地区。 相似文献
7.
本研究用间接酶联免疫吸附试验(ELISA)结合聚合酶链式反应(PCR)对我国江西省60头肉牛样品(包括血清和血液基因组)进行了牛泰勒虫病的初步调查。结果显示,该省泰勒虫血清阳性率为100%,PCR检测阳性率28.3%。其中,环形泰勒虫(Ta)阳性率为26.7%,瑟氏泰勒虫(Tser)阳性率为15%,中华泰勒虫(Tsin)阳性率为3.3%,环形泰勒虫和瑟氏泰勒虫共同感染率为13.3%,环形泰勒虫和中华泰勒虫共同感染率为3.3%。结果表明,江西省牛泰勒虫病感染较为严重,本研究为该地区牛泰勒虫病的综合防治提供了数据参考。 相似文献
8.
为了解山东省沂源县境内硬蜱携带无形体的流行及菌株变异情况,于2015年5月~7月从该地区山羊体表共分离到54份126只不同生活史阶段的长角血蜱,分组研磨提取DNA后,利用套式PCR扩增无形体的16SrRNA(ribosomal RNA)基因片段并测序及进行序列的遗传进化分析。结果显示,54份样品PCR阳性扩增率为48.1%;序列分析表明,该地区无形体存在6个变异株,分为4类,其中3类与该地区以往报道的嗜吞噬细胞无形体序列保持密切的遗传关系,还有1类与日本长角血蜱体内检出的牛无形体序列遗传关系较近。由此可见,山东沂源地区长角血蜱存在较高的嗜吞噬细胞无形体感染率,并且变异株较多;应该加强该地区对人粒细胞无形体病的宣传力度,防止该病大规模暴发。 相似文献
9.
牛东方泰勒虫病是由泰勒科、泰勒属的东方泰勒虫寄生在牛的红细胞及淋巴细胞中,从而引起的一种具有传播性的血液原虫病,以高烧、贫血、出血、异常消瘦以及体表淋巴结肿大等症状为主要临床特征。为了掌握牛东方泰勒虫病在吉林省龙井市地区的流行情况,本试验采用血涂片染色镜检与PCR检测相结合的方法对该地域的牛血液样本进行牛东方泰勒虫病的流行病学调查,并利用等位特异型引物对该病进行分型。试验结果表明,龙井地区牛东方泰勒虫PCR检测样本阳性率为32.08%(17/53),C-型的阳性率和I-型的阳性率均为13.21%(7/53),而B-型仅为7.55%(4/53),且存在两种基因型的混合感染,B型和I型混合感染率为1.87%(1/53),B型和C型混合感染率1.87%(1/53)。 相似文献
10.
为调查吉林省延边地区自然生境内游离蜱携带东方泰勒虫的情况,以东方泰勒虫主要表面蛋白基因(MPSP)基因为靶基因,采用PCR方法对延边地区自然生境内的游离蜱DNA进行扩增。在长角血蜱的DNA中检测了东方泰勒虫,检出率为29%;而全沟硬蜱中没有检测到东方泰勒虫。结果表明,自然生境中的游离长角血蜱体内携带着东方泰勒虫。 相似文献
11.
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
13.
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
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 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
17.
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
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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