一例规模化猪场爆发弓形虫病的诊治

台州市路桥区某规模化养猪场存栏经产母猪120头,后备母猪25头,保育猪270头。2009年8月中旬,25头后备母猪开始发病,体温升高、双耳发绀、呼吸急促,粪便干硬。剖检淋巴结肿大、肝脏表面出现坏死灶等,经流行病学调查和实验室诊断确诊为弓形虫病。     

猪瘟与伪狂犬病混合感染的诊治

2011年4月,云南河口县某规模养殖场饲养的生猪突然暴发以高热、呼吸困难、神经症状、呕吐、母猪流产、产死胎、木乃伊胎等为主要特征的疫病。经流行病学调查、临床症状与剖检病变分析及实验室检验确诊为猪瘟和伪狂犬病混合感染。1流行病学调查该猪场存栏生猪1 420头,其中能繁母猪36头,仔猪280头,架子猪174头。2011年4月18—22日共发病312头。其中母猪流产28头,流产率达77.78%,     

一起急性暴发性猪钩端螺旋体病的诊治

2005年7￣8月,某猪场部分初产母猪陆续出现流产、死胎,所产仔猪急性发病死亡。对症治疗后疫情缓解,但间隔两星期后,又出现发病、死亡。接到报告后,我们对猪场进行调查,经采取综合防治措施,控制了疫情,净化了猪场。1流行病调查这个猪场饲养繁殖母猪141头,后备母猪28头,种公猪10头,育成猪及哺乳仔猪186头。该猪场在后备初产母猪群中,先后出现流产、死胎、畸形胎,不同日龄仔猪急性死亡52头,经治疗控制了疫情,两星期后仔猪又陆续发病36头,急性死亡22头。经调查,造成该病暴发有以下3个因素。①该猪场的放牧地,为松花江流域一片沼泽地,是当地农民…     

猪伪狂犬病的诊断与防治

2004年9月份,豫西某养猪场猪群中出现新生仔猪体温升高、厌食及神经症状,成年猪多表现呼吸道症状,妊娠母猪流产、死胎及呼吸道症状的急性传染病。经过流行病学调查、临床症状、病理变化可做出初步诊断,后经实验实诊断,确诊为猪伪狂犬病。1发病情况该猪场饲养经产母猪254头,后备     

猪场暴发急性钩端螺旋体病的诊治

我省某猪场，在秋繁中出现母猪流产，产死胎、木乃伊胎和产后仔猪急性死亡现象，经采取综合诊断，确诊为猪急性钩端螺旋体病。现将有关情况报告如下。１流行病学调查该猪场有基础繁殖母猪１０４头，种公猪１２头，后备及育成猪１９６头。在７～９月份秋产期间，相继有４４...     

我省某养猪场发生猪流行性乙型脑炎的诊治报告

流行性乙型脑炎是由蚊为主要媒介而传播的,以温血动物为扩增宿主的高热和狂暴或沉郁等神经症状为特征的一种中枢神经系统的急性传染病。1999年10月某县养猪场发生以母猪流产的疫情,经过深入现地流行病学调查,病理学及血清学方面的检验,结合历年来有关档案资料,确诊为猪传染性乙型脑炎,经采取相应的防疫措施后,控制了该场的疫情。1　发病情况该猪场饲养长白猪110头,其中有母猪40头,后备猪70头,有6窝初产母猪发生流产,生产拖后1-2ｄ,产死胎,经产母猪每窝3-5头死胎,(足月)也有几个木乃伊胎儿,有的全窝瞎眼,生后四肢瘫痪。2　病理解剖学变化对该…     

湖南省一起猪伪狂犬病疫情的暴发调查

2015年5—6月,长沙市某猪场出现母猪流产、仔猪死亡等现象,共有60余头经产母猪流产,发病率为11%;仔猪发病死亡600余头,病死率达100%。经现场流行病学调查和实验室检测,判定该场暴发猪伪狂犬病疫情。采取淘汰阳性猪群、紧急免疫猪伪狂犬病疫苗以及加强猪场内部管理等控制措施,最终疫情得到控制。分析认为引种不规范、免疫程序不合理、饲养管理不规范是引起疫情暴发的主要原因。建议猪场加强仔猪的免疫保护和经产母猪、后备猪的引种、免疫和饲养管理。     

猪急性钩端螺旋体病的诊治

某商品猪场 1996年建场 ,建于松花江边荒坡上 ,荒坡下是沿江沼泽地 ,是猪场放牧地。猪场有基础繁殖母猪 10 4头 ,种公猪 12头 ,后备母猪 37头 ,后备公猪 4头 ,育成猪 14 5头。2 0 0 1年 7～ 8月 ,在 4 4头初产母猪中 ,有 17头陆续出现死胎、流产、产畸形胎现象 ,占开产母猪的 39%。 2 7头产仔母猪共产仔 186头 ,产后仔猪陆续急性死亡 5 2头 ,发病隔离治疗17头 ,占仔猪 34%。疫情发生后 ,该猪场兽医定性为非典型猪瘟、副伤寒、猪丹毒混合感染。经对症治疗 ,症状有所缓解。但8月 15～ 2 5日 ,该场又有 36头仔猪急性发病 ,死亡 2 2头。根据流行…     

一起猪伪狂犬病的诊治

1 流行病学调查。2003年10月我省新乡市某猪场发生一起猪伪狂犬病。该场有存栏母猪100头，商品猪700头，部分母猪于产前1个月接种过伪狂犬疫苗(华中农大gG基因缺失苗)。2003年9月份从外地引进后备母猪20头。10月份，该场部分母猪出现症状，2—3d内同栋的猪零星发病，病情逐渐向附近的保育舍、育肥舍和仔猪舍蔓延。与此同时妊娠舍母猪出现发热、咳嗽、呕吐并伴有母猪流产、死胎症状。初始发病仔猪病程5d左右，最快的1～2d内死亡。使用多种抗生素治疗无效。该病的发病率和病死率都很高。近期饲料正常，附近没有猪场。     

猪气喘病继发猪肺疫的诊治

某养猪场现有基础母猪120头，后备母猪78头．肥猪320头。2004年9月下旬发病，经流行病学调查、病理剖检、实验室检查，确诊为猪气喘病继发猪肺疫，现报告如下。     

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 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.

     

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 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.