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1.
2017年3月湖南省东安县部分养殖场的蛋鸡出现大量发病和死亡情况,对采集的15份病料进行实验室检测,经国家禽流感参考实验室确诊,疫情为H7N9亚型高致病性流感病毒感染所致。这是我国首次发现H7N9亚型流感病毒引起家禽发病死亡。调查显示,此次疫情由鸡笼、车辆等器具将H7N9亚型流感病毒从市场传入养殖场的可能性较大。建议通过提高养殖场的生物安全措施、加强活禽市场的管理、强化H7N9亚型流感病毒监测与流通监管等措施来防控H7N9亚型流感。 相似文献
2.
2017年3月28日永定区疾控中心通报了我区首例人感染H7N9流感病例,为掌握动物间H7N9流感疫情感染流行状况,查明疫情来源,为有效防控H7N9流感疫情提供参考依据。永定区动物疫病预防控制中心会同区动物卫生监督所参照《高致病性禽流感流行病学调查规范》对全区展开了H7N9流感疫情流行病学紧急调查。结果显示永定区养殖场没有发现动物间H7N9流感疫情流行,家禽交易市场环境中存在H7N9流感病毒,检测106份环境拭子中有11份为阳性,阳性率高达10%。发生人感染病例时,采取关闭家禽交易市场,加强活禽交易市场清洗和消毒等措施是控制人感染H7N9流感疫情的有效措施。 相似文献
3.
2018年9月24日,湖南省凤凰县某养殖场的鸡发病死亡,经国家参考实验室确诊为H5N6亚型高致病性禽流感疫情。为彻底扑灭该疫情,追溯疫情来源,湘西州动物疫病预防控制中心和凤凰县动物疫病预防控制控中心及时采样送检,并利用流行病学调查方法对信息进行归纳总结分析。调查结果显示:该起疫情可能是通过进出人员和车辆、水禽、野鸟等途径引入的。 相似文献
4.
2019年3月18日,辽宁省锦州市动物园报告其饲养的孔雀接连两天出现急性发病死亡。经专家组现场临床诊断,市级、省级兽医实验室检测,诊断为疑似H7N9流感疫情;经国家禽流感参考实验室进行鸡胚接种分离病毒、亚型鉴定和基因测序分析,确诊为高致病性H7N9流感疫情。为追溯疫情的可能来源、分析疫情的扩散风险,继而提出针对性的防控建议,采用现场勘察、访谈、问卷调查等形式,结合实验室检测,对该起疫情进行了紧急流行病学调查。调查发现:该起疫情袭击率为4.5%(9/200),由迁徙候鸟带毒引入可能性较大;未及时开展免疫,导致抗体水平不达标是引起疫情暴发的内在因素。经过科学处置,疫情未发生扩散。本起疫情提示,必须扎实做好禽流感免疫相关工作,高度重视家禽饲养场以及其他场所观赏鸟类的免疫,确保筑牢免疫屏障,以降低疫情发生风险。 相似文献
5.
2017年5月13日,天津市某蛋鸡场出现疑似流感疫情,发病鸡伴有呼吸困难、咳嗽等症状,死亡率持续升高,经国家参考实验室确诊为高致病性H7N9流感疫情。为查找可能风险因素并提出防控建议,进行了紧急流行病学调查。结果显示,本次疫情袭击率为10.8%,车流、人流以及野鸟带毒入场可能是引起疫情的主要原因。本次疫情得到有效处置,未发生扩散。 相似文献
6.
<正>5月23日,陕西省榆林市榆阳区兽医部门在监测中发现一养殖场饲养的蛋鸡出现疑似禽流感症状,发病死亡2.2万只。5月26日,陕西省动物疫病预防控制中心诊断为疑似禽流感疫情。5月31日,经国家禽流感参考实验室确诊,该起疫情为H7N9流感疫情。疫情发生后,当地按照有关预案和防治技术规范要求,坚持依法防控、科学防控,切实做好疫情处置工作,已扑杀和无害化处理2.3万只家禽。目前,该起疫情已得到有效控制。 相似文献
7.
自2013年4月华东地区发生H7N9流感疫情以来,H7N9流感已连续4年冬春季节出现流行,严重影响公共卫生安全和沉重打击家禽业发展。通过深入分析活禽批发市场、零售市场和养殖场各环节的生态状况,提出H7N9流行传播的模型,指出活禽市场是控制H7N9病毒的关键环节。结合广东生产实际,从改变病毒生存、传播生态条件着手,提出相应的防控策略。 相似文献
8.
2017年5月21日,陕西省榆林市某养殖场的蛋鸡出现异常死亡。经国家参考实验室确诊,该起疫情为H7N9流感疫情。为找出引发疫情的可能原因,采用描述性流行病学方法,描述疫情的三间分布,分析发病的风险因素。调查结果显示:该场饲养规模较大,共有8栋鸡舍,饲养4.5万只蛋鸡;疫情暴发突然,病程仅为5 d;蛋鸡死亡2.2万只,死亡率为48.9%;疫情具有明显的场内传播规律,从靠近鸡场入口的鸡舍逐渐向内蔓延;产蛋高峰期蛋鸡的发病风险是雏鸡的37.458倍,差异显著(P0.05);所分离毒株的HA基因裂解位点有4个氨基酸插入,为变异株;该起疫情可能是通过运输淘汰蛋鸡的车辆、野鸟、饲料和饮水,以及调入雏鸡等途径引入的。疫情发生后,当地政府按照《高致病性禽流感防治技术规范》,发布了封锁令,划定了疫点、疫区和受威胁区;在疫区采取了扑杀、无害化处理、关闭疫区内所有禽类产品交易市场等控制措施。采取以上处置措施后,疫情得以快速有效控制。 相似文献
9.
为掌握广昌县范围内家禽养殖场(户)禽流感疫情情况,为科学防控动物H7N9流感提供依,保障公共卫生安全和人民群众身体健康,进行全县来源鸡血清的H7亚型的抗体监测,以调查全县鸡群是否存在感染。结果显示,广昌县各家禽养殖场(户),未发现动物H7N9流感病毒。 相似文献
10.
2019年12月31日,新疆伊宁县报告出现天鹅异常死亡情况。经观察临床症状、剖检病理变化,结合地州级、自治区级兽医实验室复检,诊断为疑似H5型流感疫情,后经国家禽流感参考实验室进行亚型鉴定,确诊为高致病性H5N6亚型流感疫情。为确定疫情分布,分析疫情扩散风险,并提出针对性防控建议,通过现场勘查、访谈,并结合实验室检测,进行了紧急流行病学调查。调查认为,携带病毒的迁徙天鹅遭遇强冷空气可能是导致本次疫情发生的主要原因。本次野鸟疫情未发现向家禽扩散,但应高度重视饲养家禽的生物安全管理工作,避免家禽与野禽接触。 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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