龙岩地区部分猪场弓形虫病的血清学调查

通过间接血凝(IHA)试验对采自龙岩地区12个猪场的2055份猪血清进行弓形虫病的抗体检测,结果表明猪弓形虫病在龙岩地区呈散发性流行。样品阳性率为5.99%,各猪场之间的抗体阳性率有一定差异,最高为16.22%,最低为0。在母猪群中随着胎次的增加,弓形虫病抗体阳性率也升高,由1～2胎的6.72%上升到5胎以上的12.18%;育肥猪群总体弓形虫病抗体阳性率较低,由哺乳仔猪的10.94%缓慢降至育肥猪的1.62%,呈现出随日龄增加弓形虫病抗体阳性率逐渐降低的趋势。     

遵义市猪弓形虫病的血清学调查

采用酶联免疫吸附试验(ELISA)方法对采自遵义市种畜场和规模场的329份猪血清样本进行弓形虫病隐性感染抗体检测,结果显示,猪弓形虫隐性感染抗体阳性率高达82.37%(271/329),表明遵义市各县区存在不同程度的猪弓形虫隐性感染情况。其中,种畜场隐性感染抗体阳性率达92.00%(46/50),规模场为80.65%(225/279),种畜场猪弓形虫隐性感染情况比规模场略严重。试验结果为遵义市防控猪弓形虫病提供了理论依据。     

2021—2022年铜仁市碧江区猪场弓形虫的血清学调查

为初步调查碧江区部分猪场弓形虫病感染情况，2021年6月—2022年6月采用间接血凝试验(IHA)检测碧江区30个猪场850份血清样品的弓形虫抗体阳性率。90份血清样品检测为弓形虫抗体阳性，平均阳性率为10.59%(90/850);5个乡(镇)来源猪血清样品弓形虫抗体阳性率分别为7.92%、4.38%、10.00%、21.67%、13.33%。不同发育阶段猪群弓形虫抗体阳性率存在差异，其中经产母猪较其他年龄阶段猪群阳性率高；经常出现野猫和老鼠的猪场来源样品弓形虫抗体阳性率高于出没频率低的猪场。研究结果表明：碧江区部分猪场弓形虫感染情况较为严重，猪场应定期进行弓形虫抗体监测，同时注意灭鼠和驱猫等工作。     

厦门市部分猪场猪弓形虫病血清学调查与分析

为了解厦门市部分猪场猪弓形虫的感染情况,在不同猪场随机采集478例不同日龄猪血样,分离血清后采用弓形虫病间接血凝试验(IHA)进行血清学检测。结果显示:受检的478例样本中检出猪弓形虫病抗体192例,阳性率为40.17%。其中35日龄猪的阳性率为22.02%,90日龄猪的阳性率为31.41%,哺乳母猪的阳性率67.52%。结果表明,各猪场不同日龄猪都有一定程度的弓形虫感染,而哺乳母猪的感染率最高。     

海南省猪场弓形虫病血清流行病学调查

对采自海南省各市县12个猪场285份血清用间接血凝(IHA)试验进行猪弓形虫病抗体检测。结果表明,猪场整体阳性率为39.30%,其中公猪群抗体阳性率为34.21%;母猪群抗体阳性率为64.23%;仔猪群抗体阳性率为21.15%;肥猪群抗体阳性率为0。仔猪群与公猪群抗体阳性率差异不显著;肥猪群与仔猪群、母猪群、公猪群抗体阳性率差异极显著;母猪群与公猪群、仔猪群抗体阳性率差异极显著。各猪场弓形虫病感染率有所差异,抗体阳性率在0～82.35%之间。     

青海省海南地区猪弓形虫病血清学调查及分析

为了解青海省海南地区猪弓形虫病的感染情况,采用间接血凝试验对2015年采集的15个规模化猪场及散养的460份猪血清进行了弓形虫病血清学抗体的检测。试验结果表明:待检的460份血清样品,弓形虫抗体阳性52份,阳性率为11.30%。结果表明:规模化养殖和散养两种不同的养殖方式之间感染差异显著(P0.05)。最高的猪场弓形虫阳性率可达28.89%。其中成年猪的感染率为18.6%,高于仔猪和保育猪的4.6%(P0.05)。哺乳母猪感染率最高,可能与成年猪的饮食习惯及接触环境中卵囊机会有关。     

淮安市猪弓形虫病血清学调查

弓形虫病是刚地弓形虫引起的一种人和多种动物共患寄生虫病。本调查通过酶联免疫吸附（ELISA）试验对采自淮安15个规模猪场的300份猪血清进行弓形虫病的抗体检测,结果表明被检样本猪弓形虫病抗体阳性率平均为26．67％,各规模猪场之间的抗体阳性率有一定差异,最高为45％,最低为10％,被检猪场均有弓形虫病感染。     

贵阳地区猪弓形虫病的血清学检测方法分析

为全面了解贵阳市地区猪弓形虫感染情况,于2014年4月～2015年5月分别采集贵阳地区猪血清样本共984份。采用弓形虫间接血凝试验（IHA）和弓形虫IgG抗体ELISA两种方法来检测。结果显示,两种方法存在关联性,前者阳性率为17.37%,后者阳性率为20.73%。表明贵阳地区不同类别的养猪场户存在弓形虫病感染,此外,ELISA方法检测弓形虫抗体检出率高于间接血凝试验。     

猪弓形虫病的ELISA诊断及试剂盒建立

用弓形虫的重组蛋白P30作为ELISA诊断抗原,进行了ELISA诊断试剂盒的建立,并对互助县猪弓形虫病的血清学诊断。经对所收集的139份猪血清抗体进行检测,共检出阳性血清8份,阳性率为5.76%。结果说明互助县猪群中存在弓形虫病的感染。     

四川德阳某猪场主要繁殖障碍性疾病的抗体检测

为了解四川德阳某猪场发生母猪繁殖障碍性疾病的原因,试验对该场待配母猪在1,3,5,7月份猪蓝耳病、猪瘟、细小病毒病、乙型脑炎、弓形虫病和衣原体病的抗体水平进行了检测并采取相应控制措施。结果表明:1月份猪蓝耳病、猪瘟、细小病毒病、乙型脑炎、弓形虫病和衣原体病抗体阳性率分别为100%、100%、100%、100%、85.00%、0;3月份抗体阳性率分别为97.50%、87.50%、85.00%、82.50%、22.50%、12.50%;5月份抗体阳性率分别为100%、76.67%、100%、96.67%、90.00%、90.00%;7月份抗体阳性率分别为95.00%、90.00%、60.00%、67.50%、0、5.00%。     

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 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 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 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 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 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 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.