河南省规模化猪场肠道寄生虫感染情况调查

为查明河南省规模化猪场寄生虫感染情况,应用直接涂片法、饱和食盐溶液漂浮法、水洗沉淀法、饱和蔗糖溶液漂浮法和改良抗酸染色法等5种方法,对河南省10个地市13个规模化猪场不同年龄猪群的1119份粪便样品进行检查。结果显示:猪肠道寄生虫感染主要为球虫、类圆线虫、鞭虫、蛔虫、结肠小袋纤毛虫和隐孢子虫;寄生虫总感染率为56.21%,其中球虫感染率为41.73%;隐孢子虫感染率为11.35%;结肠小袋纤毛虫感染率为9.47%;类圆线虫感染率为5.45%;蛔虫感染率11.53%;鞭虫感染率为6.43%。本研究为今后有效防治河南地区猪寄生虫病提供科学依据。     

河南省猪的肠道寄生虫感染情况调查

应用饱和食盐溶液漂浮法、水洗沉淀法、饱和蔗糖溶液漂浮法、改良抗酸染色法等多种方法对河南地区所属的10个地市12个规模化养猪场、12个养猪小专业户及12个散养户的不同年龄猪群的1 210份粪便样品进行寄生虫检查。结果显示:猪肠道寄生虫中,球虫、蛔虫、类圆线虫、毛首线虫、结肠小袋纤毛虫、隐孢子虫等总感染率为40.08%,其中规模化猪场共采粪样1 010份,寄生虫感染率为36.44%;对养猪小专业户、散养户采取的200份粪样检查,寄生虫感染率为58.50%。结果表明:本省规模化猪场、养猪小专业户、散养户猪部分肠道寄生虫流行仍较严重,其防治工作任重道远。     

江苏省苏中地区规模化猪场肠道寄生虫感染情况调查

为了解江苏省苏中地区规模化猪场肠道寄生虫的感染情况,从该地区15个规模化养猪场随机采集了895份粪便样品,采用水洗沉淀法、饱和盐水漂浮法和卢戈氏碘液染色镜检法对样品进行了检查。结果:肠道寄生虫的总感染率为15. 08%,主要感染虫种包括球虫、食道口线虫、毛首线虫、蛔虫和结肠小袋纤毛虫。其中结肠小袋纤毛虫、蛔虫和球虫的感染率较高,分别为5. 81%、4. 47%和3. 35%。保育猪和种公猪的肠道寄生虫感染率显著高于其他生产阶段,仔猪的感染率最低。     

安徽省规模化猪场猪肠道寄生虫感染情况调查

为了解安徽省规模化猪场肠道寄生虫感染情况,从安徽省亳州市利辛县、安庆市宿松县和潜山县、滁州市琅琊区、合肥市长丰县、阜阳市颍上县和六安市裕安区7个规模化猪场采集粪便样品500份,采用饱和蔗糖溶液漂浮法、水洗沉淀法、卢戈氏碘液染色-镜检法进行检查。结果显示:猪肠道寄生虫总感染率为31.00%,共检出结肠小袋纤毛虫、球虫、毛滴虫、类圆线虫和食道口线虫等虫种,其中以结肠小袋纤毛虫、球虫和毛滴虫为主要感染虫种。调查结果表明安徽省规模化猪场蠕虫的防控较好,建议加强对肠道原虫病的防控。     

江苏省规模化猪场蠕虫感染情况调查

为了解江苏省规模化猪场蠕虫的感染情况，笔者从徐州、泰州、宿迁、盐城、扬州和南通6个地区的12个规模化养猪场随机采集937份粪便样品，采用离心沉淀法、饱和氯化钠漂浮法和饱和硫酸镁漂浮法对粪便样品进行了检查。结果显示，在12个养殖场均发现寄生虫感染，粪便样品中蠕虫虫卵的检出率为7.6%。徐州地区的两个猪场感染率最高，合计达20.7%；泰州地区的两个猪场感染率最低，仅有1.7%。宿迁、盐城、扬州和南通地区的调查猪场感染率分别为6.5%、8.2%、5.4%和5.4%。调查显示，感染虫种包括蛔虫、鞭虫、后圆线虫、食道口线虫和类圆线虫，其中蛔虫和食道口线虫的感染率较高，分别为5.2%和3.6%。徐州、宿迁、盐城、扬州和南通5个地区的猪场内存在蛔虫和鞭虫、蛔虫和食道口线虫，以及蛔虫和后圆线虫混合感染的情况。经比较发现，妊娠母猪和哺乳母猪的肠道寄生虫感染率高于其他生产阶段，仔猪感染率最低。检查中未见绦虫、吸虫和棘头虫等虫卵。本研究结果表明，江苏地区的规模化猪场普遍存在线虫感染的情况，蛔虫、食道口线虫和鞭虫感染强度较高，定期驱虫有助于规模化猪场线虫病的防控。     

江苏省规模化猪场蠕虫感染情况调查

为了解江苏省规模化猪场蠕虫的感染情况,笔者从徐州、泰州、宿迁、盐城、扬州和南通6个地区的12个规模化养猪场随机采集937份粪便样品,采用离心沉淀法、饱和氯化钠漂浮法和饱和硫酸镁漂浮法对粪便样品进行了检查。结果显示,在12个养殖场均发现寄生虫感染,粪便样品中蠕虫虫卵的检出率为7.6%。徐州地区的两个猪场感染率最高,合计达20.7%;泰州地区的两个猪场感染率最低,仅有1.7%。宿迁、盐城、扬州和南通地区的调查猪场感染率分别为6.5%、8.2%、5.4%和5.4%。调查显示,感染虫种包括蛔虫、鞭虫、后圆线虫、食道口线虫和类圆线虫,其中蛔虫和食道口线虫的感染率较高,分别为5.2%和3.6%。徐州、宿迁、盐城、扬州和南通5个地区的猪场内存在蛔虫和鞭虫、蛔虫和食道口线虫,以及蛔虫和后圆线虫混合感染的情况。经比较发现,妊娠母猪和哺乳母猪的肠道寄生虫感染率高于其他生产阶段,仔猪感染率最低。检查中未见绦虫、吸虫和棘头虫等虫卵。本研究结果表明,江苏地区的规模化猪场普遍存在线虫感染的情况,蛔虫、食道口线虫和鞭虫感染强度较高,定期驱虫有助于规模化猪场线虫病的防控。     

河南地区鹧鸪肠道寄生虫感染情况调查及隐孢子虫鉴定

为了解鹧鸪肠道寄生虫感染情况,采用饱和蔗糖溶液漂浮法对河南省4个鹧鸪放养场共181份新鲜粪便进行检查,寄生虫总感染率为59.7%,以球虫和圆线虫为优势感染虫种,感染率分别为53.0%和14.4%,隐孢子虫、蛔虫、毛细线虫和绦虫感染率分别为2.2%、8.3%、3.3%和0.6%。基于18 S r RNA基因位点,4份隐孢子虫均鉴定为贝氏隐孢子虫。调查结果表明,放养条件下鹧鸪肠道寄生虫感染较为普遍,且隐孢子虫不具人兽共患风险性。     

广东和浙江部分地区集约化猪场肠道寄生虫感染情况调查

笔者于2008年6—8月对广东和浙江部分地区7个集约化猪场猪群进行寄生虫感染情况调查。结果显示,7个猪场中有6个猪场存在寄生虫感染,场阳性率为85.71%;主要感染虫种有食道口线虫、猪球虫、小袋纤毛虫、鞭虫等,其中猪球虫感染率达到24.74%,食道口线虫感染率为7.22%,小袋纤毛虫感染率为2.06%,鞭虫感染率为1.03%,且不同年龄阶段猪群寄生虫感染情况不一。     

虫力黑“四加一”驱虫模式

据调查,集约化猪场的寄生虫感染仍较普遍,其中小袋纤毛虫感染率42.7%,球虫感染率24.9%,疥螨感染率10%,鞭虫感染率5.7%,蛔虫感染率5.2%,食道口线虫感染率     

龙岩市部分猪场肠道寄生虫感染情况调查

为了解龙岩市部分猪场的肠道寄生虫感染情况,采集了7个来自龙岩市不同地区的猪场粪便样品569份,采用饱和盐水漂浮法对粪便样品进行检测。实验结果表明,569份粪便样品中,寄生虫感染总阳性率为11．78％,其中球虫感染率最高,为6．68％,小袋虫感染率为3．87％,猪蛔虫感染率为1．23％,未见有其它寄生虫的感染。且不同年龄阶段猪群感染寄生虫情况不一。猪球虫和小袋虫是目前主要存在于龙岩市规模化猪场的危害猪只健康的肠道寄生虫,应引起重视。     

Heartworm in dogs in Canada in 1984

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.

     

Heartworm in dogs in Canada in 1983

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.

     

Heartworm in dogs in Canada in 1991

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.     

Heartworm in dogs in Canada in 1985

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.

     

Heartworm in dogs in Canada in 1988

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%).     

Heartworm in dogs in Canada in 1989

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.

     

Heartworm in dogs in Canada in 1987

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%).     

Heartworm in dogs in Canada in 1986

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.