共查询到20条相似文献，搜索用时 153 毫秒
1.
对黑龙江省牛、羊东毕吸虫病的流行情况及地理分布特进行了调查研究，初步认定我省有三种东毕吸虫，即程氏东毕吸虫（O.cheni)、土耳其斯坦东毕吸虫（O.turkestanica)和土耳其斯坦东毕吸虫结节变种（O.turkestanica var.tuberculata)。中间宿主螺类有三种，即耳萝卜螺、卵萝卜螺和小土窝螺；东毕吸虫病在黑龙江省分布较广，在调查的34个县（市）中有27个县（市）的牛、羊感染东毕吸虫，平均感染率分别为43．97％和61．98％，齐齐哈尔地区最为严重，牛、羊、的平均感染率分别达到62．73％和76．36％，大庆，绥化，哈尔滨，北安地区感染率也较高，佳木斯，黑河，鸡西地区属零星发生，牡丹江地区未检出。 相似文献
2.
对齐齐哈尔市羊东毕吸虫的种类、中间宿主螺类及羊东毕吸虫的感染率、感染强度、死亡率进行了调查，结果齐齐哈尔市羊有程氏东毕吸虫、土耳其斯坦东毕吸虫和土耳其斯坦东毕吸虫结节变种3种；中间宿主有卵萝卜螺和小土窝螺2种；在调查的9县(市、区)中有8县(市、区)有东毕吸虫病发生，羊平均感染率和死亡率分别为76．36％和19．31％，除拜泉没有检出虫体外，依安、齐齐哈尔市建华区、甘南、克东、富裕、讷河、龙江等地感染率均很高，泰来最为严重，感染率达到94．05％。根据调查结果，制定了齐齐哈尔市羊东毕吸虫病综合防治措施。 相似文献
3.
东毕吸虫病是一种对人畜危害较大的人畜共患寄生虫病。其病原为东毕属吸虫。东毕属(特点是睾丸多达60～120个,卵巢螺旋形)中较重要的虫种有土耳其斯坦东毕吸虫及其结节变种、彭氏东毕吸虫和程氏东毕吸虫等,可寄生于黄牛、水牛、绵羊和山羊。彭氏东毕吸虫还可感染瘤牛,猪也有受感染的。东毕吸虫的中间宿主为椎实螺、耳萝卜螺、折叠萝卜螺、卵圆萝卜螺和小土蜗等。生活史大体与裂体吸虫相似。东毕吸虫尾蚴能钻入人的皮肤,引起皮炎。严重患病的犊牛发育缓慢,变成侏儒牛。母畜不孕,孕畜流产。笔者经多年调查,对湘西自治州有代表性的几个地区的牛… 相似文献
4.
羊土耳其斯坦东毕吸虫病是由寄生于羊门脉和肠系膜静脉内的土耳其斯坦东毕吸虫引起的,对发展养殖业危害极大的一种血吸虫病。以往一直认为大庆地区无家畜血吸虫病的发生,但１９９８年１２月２日到１９９９年３月８日,通过外检,首次对１个单位和４家养羊户送检的３只绵羊和２只山羊进行诊断,确诊为土耳其斯坦东毕吸虫病。５群羊的总饲养数为６３７只（８７～１６０只）,到送检时已死亡３１１只,死亡率高达４８．８２％（２２．６７％～７１．４３％）。现将对５群羊发病死亡情况的调查和诊断过程报道如下。１ 流行病学调查１．１ 发… 相似文献
5.
东毕吸虫分类问题一直是大家比较关心的问题，本文根据课题研究情况并结合他人研究资料，对东毕吸虫属的三个种，即土耳其斯坦东毕吸虫、土耳其斯坦东毕吸虫结节变种和程氏东毕吸虫的光镜和电镜观察情况进行了比较和分析，并结合近期有关对虫体DNA序列分析资料，对三种东毕属吸虫分类地位进行了讨论。 相似文献
6.
对吉林省镇赉县两牧场的小土蜗(Galba pervia)和耳萝卜螺(Radix auricularia)体内片形吸虫(Fasciolas sp)、东毕吸虫(Orientobicharzia sp)幼虫做了调查。结果为,东毕吸虫尾蚴6月下旬开始从螺体内逸出,8月中旬达最高峰,9月下旬逐渐减少。片形吸虫尾蚴7月中旬开始从螺体内逸出,9月上旬达最高峰,10月上旬阳性螺逐渐减少。含两种吸虫幼虫的阳性螺率与气温和降雨量呈正相关关系;片形吸虫幼虫可以以雷蚴的形式在螺体内越冬,该地区含东毕吸虫幼虫的阳性螺率比含片形吸虫幼虫的阳性螺率高。含东毕吸虫尾蚴的阳性螺率最高达52.52%(252/480), 而含片形吸虫尾蚴的阳性螺率最高只达17.33%(52/300)。 相似文献
7.
东毕吸虫(orientobilharzia)因寄生于动物血管内故称血吸虫。1984年4月在酒泉县调查绵、山羊寄生虫的过程中,在3只绵羊的真胃、小肠和大肠内发现东毕吸虫96个(成对),其中以小肠寄生最多。这些绵羊的肠系膜静脉内均寄生有程氏东毕吸虫和土耳其斯坦东毕吸虫,但以程氏东毕吸虫居多。 相似文献
8.
吉林省西北部幅员辽阔 ,地势平坦 ,有大小泡沼多达 1 2 5 0个 ,许多河流进草原后形成无尾河 ,或流进泡河内。雨季雨水流入洼地 ,长期浸泡低洼草场 ,极利于东毕血吸虫的中间宿主椎实螺的繁殖生长。1 986年和 1 998年该地区先后两次牛、羊东毕血吸虫病流行 ,造成了较大经济损失。1 病原土耳其斯坦东毕吸虫属于裂体科 ,东毕属吸虫 ,主要寄生于牛羊肠系膜静脉 ,引起牛、羊东毕血吸虫病。其中间宿主为水生椎实螺。牛、羊粪便中的虫卵 ,在水中孵化成毛蚴 ,侵入螺体 2 1天后发育成尾蚴逸出 ,在水中经皮肤侵入终末宿主体内 ,移行到肠系膜静脉管中生… 相似文献
9.
将pGEM—TM质粒上的土耳其斯坦东毕吸虫原肌球蛋白（TM）基因片段亚克隆至原核表达载体pET28a（＋），重组的pET28-TM在大肠埃希氏菌BL21（DE3）中经1mmol／LIPTG诱导表达出-37．5ku的融合蛋白。该蛋白经Ni—NTA亲和层析柱纯化，SDS—PAGE检测，出现与目的蛋白大小一致的单一条带。Western-blotting检测结果表明，纯化的蛋白可被自然感染东毕吸虫的山羊血清识别，这为进一步研究东毕吸虫基因工程疫苗奠定了基础。 相似文献
10.
通过中间宿主调查、黄牛粪便生物学检查，病原体鉴定，人工培养尾蚴感染黄牛和家兔试验、药物治疗病畜等一系列研究，证明长江三峡上游的万县、涪陵、黔江、重庆、南充和达县等地（市）有东毕吸虫病流行，中间宿主是狭窄卜螺和小土蜗，解剖黄牛３４关，感染率达３３．０－４４．４％，感染强度为１－４０００条；用生物学方法检查黄牛１２６８头，阳性率为２３．２０％，，采用硝氰醚等药物治疗自然感染东毕吸虫病牛４６０头，转阴率 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
|
