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1.
猪圆环病毒病是由猪圆环病毒(Porcinecir-covirus,PVC)引起猪的一种多系统功能障碍性疾病,临床上以新生仔猪先天震颤和断奶仔猪多系统衰弱综合征为主要症状。猪断奶后衰竭综合征(PMWS)的病原体已被世界各国学者公认为猪圆环病毒(PCV-2),所以PMWS应属于猪圆环病毒病。另外,猪皮炎与肾炎综合征(PDNS)、增生性坏死性肺炎(PNP)等其他许多猪病也于PCV-2感染有极其重要的关系。本病最早发现于加拿大(1991),以后此病很快蔓延至美国、西班牙、英国、丹麦、德国、荷兰、比利时等国家。近年来中国以及台湾地区也有此病发生和流行,1999年,我… 相似文献
2.
<正>猪圆环病毒(PCV)病是由猪圆环病毒2型(PCV2)感染所致的一种新的病毒病,猪圆环病毒病又称"断奶仔猪多系统衰竭综合征"(PMWS)。该病作为一种新的病毒病在许多国家广泛流行,发病率高,一年四季均可发生,传播迅速,传播面积广,易 相似文献
3.
猪圆环病毒感染是由猪圆环病毒2型(PCV2)引起的一种新传染病．主要特征为猪体质下降、消瘦、呼吸困难、咳喘、腹泻、贫血和黄疸等。国内于1991年报道了本病，现在全国各地均有发生与流行。目前已证实，猪圆环病毒与仔猪断奶后多系统衰竭综合征(PMWS)、猪皮炎与肾病综合征(PDNS)、猪间质性肺炎(IP)、母猪繁殖障碍和传染性先天性震颤有关，给养猪业造成了严重损失。 相似文献
4.
正1病情简述断奶仔猪多系统衰竭综合征(PMWS)是由猪圆环病毒(PCV)Ⅱ型引起的一种新传染病,临床症状以仔猪先天性震颤,断奶猪发育不良、咳嗽、消瘦和黄疸为特征。自1999年以来,在北京、河北某些猪场相继发现了疑似PMWS的病毒,对病原进行电镜观察、间接免疫荧光试验、PCR试验,鉴定为PCVⅡ型,从而确定这些猪场也存在PMWS。2病原(1)猪圆环病毒Ⅱ型(PCV-2)属于圆环病毒科圆环病 相似文献
5.
<正>猪圆环病毒病是由猪圆环病毒Ⅱ型(porcine circovirus,PCV2)引起的断奶仔猪进行性消瘦、淋巴组织等病变的一种多系统衰竭综合症(PMWS)。猪圆环病毒为单股负链环状DNA病毒,是已知最小的动物病毒之一 相似文献
6.
断奶仔猪多系统衰竭综合征(PMWS)是由猪圆环病毒2型(PCV-2)及猪蓝耳病病毒、猪细小病毒、副猪嗜血杆菌、猪伪狂犬病病毒、猪肺炎支原体、附红细胞体等多病原引起的一种新的传染病。PCV-2作为PMWS主要的、原发性病原,除可引起PMWS外,还可导致母猪繁殖障碍、断奶仔猪和育肥猪的呼吸道疾病、猪皮炎和肾病综合征及先天性震颤等。PMWS已成为我国规模化猪场的主要疫病,给我国的养猪生产造成了巨大的经济损失。1病原特征猪圆环病毒(PCV)属圆环病毒科、圆环病毒属,是已知的最小的病毒。PCV以滚环方式复制,呈20面体对称,无囊膜,直径17~22… 相似文献
7.
<正>猪圆环病毒病是由猪圆环病毒2型引起的一种高度免疫抑制传染病,临床表现较为复杂。圆环病毒对免疫器官有严重的侵害性,可破坏机体免疫系统,从而容易导致继发或并发其他传染病,或加重其他传染病的表现和病理过程。圆环病毒的代表性疾病有猪断奶后多系统衰竭综合征(PMWS)、母猪繁殖障碍病、A2型先天性震颤与猪皮炎肾病综合征(PNDS),PMWS最早发现于加拿大。目前此病已给世界 相似文献
8.
猪圆环病毒(PCV)病是近几年新发现的一种猪的传染病,由猪圆环病毒(PCV)引起猪的一种多系统功能障碍性疾病.猪圆环病毒病临床上以断奶仔猪多系统衰竭综合征(PMWS)等为主要特征,该病原体已被确认为猪圆环病毒Ⅱ型(PCV2).研究表明,猪圆环病毒Ⅱ型不仅是断奶仔猪多系统衰竭综合征(PMWS)的病原而且能够引起多种猪病,主要有新生仔猪先天性脑震颤、猪皮炎及肾衰综合征、猪增生性坏死性肺炎等,并常与猪细小病毒(PPV)、猪繁殖与呼吸综合征病毒(PRRSV)等病原合并感染使病情加重和复杂化,也是引起母猪繁殖障碍的病原之一. 相似文献
9.
猪断奶后多系统衰竭综合征(PMWS)是由猪2型圆环病毒(PCV-2)引起的一种造成断奶仔猪高死亡率的传染病。病猪的特征为逐步消瘦,皮肤苍白,呼吸急促,并继发感染其他疾病。该病现已在全国普遍发生,是造成养猪业经济损失的主要原因,应引起有关部门的研究和重视。1病原据国内外研究资料显示,PMWS的主要致病因子为猪圆环病毒2型,于1974年首次在猪肾传代细胞(PK-15)污染物中分离到PCV。1982年被命名为猪圆环病毒,为圆环病毒科圆环病毒属成员,单股环状DNA病毒,为已知的最小动物病毒之一。资料表明,PMWS可能是PCV-2与猪瘟、猪细小病毒、猪繁… 相似文献
10.
猪断奶后多系统衰竭综合征(PMWS)是一种由猪圆环病毒2型(Porcine circovirus 2，PCV2)引起的新病。PCV是1974年在猪肾传代细胞系PK-15中发现的一种污染病毒，该病毒不产生细胞病变效应(CPE)，无致病性，命名为PCV1；而后在PMWS中分离的猪圆环病毒，有致病性，命名为PCV2。PMWS主要感染1～5月龄的猪，发病率为4％～30％，致死率为70％～80％。患病断奶猪和生长猪临床表现为进行性消瘦、呼吸困难、皮肤苍白、黄疸、腹泻和体表淋巴结肿大， 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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