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1.
为有效防范兵团六师范围内非洲猪瘟疫情的发生，对辖区内13个团场分布的蜱种类进行调查，并采用实时荧光PCR对采集的163只蜱进行非洲猪瘟病毒(ASFV)检测。结果显示，捕捉的163只蜱隶属于2科5属10种，包括8种硬蜱和2种软蜱。其中亚洲璃眼蜱、全沟硬蜱和森林革蜱为该地区优势种，分别占采样总数的28.83%(47/163)、23.93%(39/163)和15.34%(25/163)。对于ASFV的潜在传播媒介，只采集到2种钝缘蜱属的蜱种，包括4只拉合尔钝缘蜱和2只乳突钝缘蜱；采集的163只蜱体内均未检出ASFV的DNA。鉴于目前非洲猪瘟疫情流行形势、生猪养殖区域及野猪分布情况，需在该地区持续性地开展蜱种调查和其体内携带ASFV情况的监测，以期为该地区非洲猪瘟的防控提供流行病学数据。 相似文献
2.
传播非洲猪瘟病毒(African Sween fever Virus,ASFV)的生物媒介可以分为两类:"储存-复制"方式传播ASFV的生物媒介(钝缘软蜱)、机械性携带并传播ASFV的生物媒介(如蚊、蝇);国内关于钝缘软蜱地域分布及其与ASFV间互作关系的研究较少。笔者推测:近期国内由钝缘软蜱传播ASFV的风险较低,但仍需摸清其在国内真实分布情况;猪群环境中鼠、蚊、蝇等机械性生物媒介传播ASFV的风险较大,应进行有效消杀。 相似文献
3.
为了解新疆鄯善县春季蜱虫种类及分布情况,2021年3—5月在鄯善县的5个村庄采集羊体表蜱虫及盐碱地区域环境中的蜱虫,利用体视显微镜进行形态学鉴定,并统计羊只携带蜱虫情况及其种类。结果显示:共在150只羊体表和环境中分别采集到1392只和1007只蜱虫;采集到蜱虫归于2科3属5种,分别为硬蜱科的亚洲璃眼蜱、小亚璃眼蜱、血红扇头蜱和图兰扇头蜱以及软蜱科的拉合尔钝缘蜱,其中亚洲璃眼蜱数量最多,占48.99%,在5个村均有分布;3—5月羊带蜱率逐渐上升,分别为14.67%、35.33%、68.67%,携带的种类由拉合尔钝缘蜱1种逐渐增加到5种。结果表明,新疆鄯善县春季流行的优势蜱种为亚洲璃眼蜱,而随气温升高,蜱虫种类及数量逐渐增加,活动范围进一步扩大,因此春季应加强蜱虫的消杀工作。本调查为鄯善县春季蜱虫传播疫病的防控及后续研究提供了参考。 相似文献
4.
为了解广东地区家畜体表寄生蜱的种类及其携带病原情况,评估蜱媒病在广东省的传播风险,对该地区3个生境点(湛江、汕头、清远)的牛体寄生蜱进行了调查。2012年10月—2013年10月采用体表检视法和布旗法分别采集广东省不同地区的牛体表寄生蜱和牛舍环境周围游离蜱样本共109只,并进行实验室鉴定、检测。通过特异PCR方法分别检测无形体、莱姆病、巴贝西原虫、立克次体和Q热5种主要病原携带情况。结果显示:采集到的109只蜱虫样本均为微小牛蜱,其中湛江样品中检出6份无形体阳性样品,阳性率为5.5%(6/109);莱姆病、巴贝西原虫、立克次体和Q热均检测阴性。研究表明,广东省牛体寄生蜱种类相对单一为微小牛蜱,携带有阳性蜱传病原(嗜吞噬细胞无形体)。提示:广东省极有可能存在该病的自然疫源地,需要进一步调查并进行更深入的生态与分子流行病学研究。 相似文献
5.
为了调查新疆边境地区梨形虫在当地蜱中的携带情况,对采集于2019年4月份和5月份的新疆边境地区共25个县(市)的蜱进行形态学鉴定,提取DNA,利用梨形虫套式引物进行扩增并测序,并采用IQ-Tree软件的ML法构建不同地理株的进化关系.结果显示,采集到的1 516只蜱包括4个属9个种,分别为森林革蜱(Dermacento... 相似文献
6.
[目的]了解甘肃省武威市蜱和蜱媒病的种类和分布情况,便于建立牛、羊等草食家畜疫病的科学防控模式。[方法]通过布旗法、家畜体表捕捉法与分子生物学方法,对武威市所辖的4个县(区)进行了蜱传播疫病及其传播媒介的流行病学调查。[结果]在全市41个乡镇均发现有蜱的存在,主要以硬蜱属为主,但也发现有软蜱属;全市各县区均发现有梨形虫的感染。[结论]蜱在武威市分布广泛,该地区的蜱媒病感染情况也比较严重;软蜱属的发现增大了外来动物疫病的感染风险;威武地区需加强对蜱及蜱媒病危害和防控的认识,采取以灭蜱和杀灭病畜体内病原相结合的方法,来控制虫媒病的传播。 相似文献
7.
非洲猪瘟(African Swine Fever,ASF)是由非洲猪瘟病毒(African Swine Fever Virus,ASFV)引发的一种猪病,可以造成猪大量发病和死亡。该病毒可以通过与感染猪、感染猪的产品或易感的媒介(尤其是钝缘蜱属的蜱)直接或间接地接触传播。ASF在非洲和东欧大部分地区呈地方性流行,病毒侵入未发生ASF的国家可以造成严重的经济影响,因为感染动物的生产会受到损失以及因非洲猪瘟的暴发可能受到贸易限制。我们确定了可能会造成ASFV侵入美国或其他无ASF国家的薄弱环节。合法和非法的活体动物运输,以及动物产品、副产品、饲料进口都会带来病毒侵入的风险。我们将介绍每一条侵入路径,概述用于防止ASFV和其他病原体侵入美国的现有规定;此外,我们还将强调现有的ASFV研究空白。可以评价多种尚未定性的钝缘蜱属中蜱种的实验室试验将有利于了解媒介能力、宿主偏好和易感软蜱媒介的分布与高密度养猪生产区以及野生猪(野猪或类似物种)大量生活区域的关系。促使宿主应答和决定可产生保护作用免疫机制的抗原性病毒蛋白的相关知识是研发疫苗的基础。最后,对非法进口和查抄的野猪产品采样以检测ASFV可以对进口产品的类型提供新的认识,并可以提供关于ASFV侵入风险的更多知情看法。 相似文献
8.
试验旨在了解新疆边境地区昆玉市的蜱种分布状况.从该地区骆驼体表采集寄生蜱虫,应用数码体视显微镜初步进行形态学鉴定,采用蜱种鉴定的特异性引物对总DNA进行分子生物学检测,采用MEGA 10.0软件邻接法构建遗传进化树,确定蜱虫的进化生物学特征.结果表明,从昆玉市骆驼体表采集的蜱样符合亚洲璃眼蜱的形态学特征,线粒体16S ... 相似文献
9.
本试验旨在探究新疆优势分布的2种硬蜱所携带马泰勒虫、马驽巴贝斯虫和饶氏立克次体病原的情况。对采集于昭苏、和静2个采样点的硬蜱样品(n=188)经过分子生物学方法进行了种属鉴定的同时,以马泰勒虫18S rRNA、马驽巴贝斯虫Bc48和饶氏立克次体16S rRNA为靶标,应用PCR进行检测,并将阳性产物测序比对。在188只蜱虫中,93只(昭苏县)为边缘革蜱,95只(和静县)为森林革蜱;在2种硬蜱中,马驽巴贝斯虫的PCR阳性率分别为昭苏县30.1%(28/93)、和静县6.3%(6/95);饶氏立克次体的检出率分别为昭苏县6.5%(6/93)、和静县36.8%(35/95)。试验鉴定归类了昭苏县与和静县采样点的优势种硬蜱,并发现两地的2种硬蜱均可携带马驽巴贝斯虫和饶氏立克次体,本试验为革蜱携带病原相关研究以及蜱传疾病的科学防控提供基础数据。 相似文献
10.
为了解甘肃省武威市骆驼蜱以及梨形虫病病原种类和分布情况,保护和开发骆驼产业,通过分子生物学检测手段,对采集的骆驼蜱虫与骆驼抗凝血样进行流行病学调查和分子生物学鉴定。采集的蜱虫经鉴定为亚洲璃眼蜱,说明亚洲璃眼蜱是该地的优势种;在蜱样品中检测到双芽巴贝斯虫阳性样品1份,说明当地存在通过蜱传播梨形虫病的风险。本研究对于提高该地区骆驼养殖业对蜱与梨形虫病危害和防控的认识具有积极意义,也为当地蜱以及梨形虫病防治提供了依据。 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
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