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1.
仔猪腹泻现象在猪场时常发生，其主要传染性因素的病原分为病毒和细菌两类。猪流行性腹泻病毒是最主要的病毒病原，而大肠杆菌则是重要的细菌病原。当猪流行性腹泻病毒和大肠杆菌混合感染时，会给猪场造成严重的经济损失。本文通过一例仔猪猪流行性腹泻病毒和大肠杆菌混合感染的病例，从发病情况、剖检变化、实验室诊断、药敏试验、防治等方面进行阐述，旨在为临床上防控这两种疾病提供参考。 相似文献
2.
通过一系列实验室诊断措施,对吉安某猪场采集的腹泻仔猪小肠黏膜(病死)、新鲜粪便(存活)以及30份血样(母猪24头,保育仔猪6头)进行病原检测,结果显示,该场仔猪腹泻可以排除免疫失败、寄生虫、仔猪流行性腹泻病毒等致病因素,主要病因为小肠黏膜分离到的革兰氏阴性球菌(肠产毒型大肠杆菌),对该分离菌进行药敏试验,结果对丁胺卡那... 相似文献
3.
本文针对发生腹泻疫情的某猪场开展了实验室检测和流行病学调查,实验室检测表明该疫情的病原为猪流行性腹泻病毒。流行病学调查显示,此次腹泻疫情于2013年11月份开始暴发,2014年3月份结束,发病猪的种类具有明显的次序,育肥猪首先发生,其次是母猪,新生仔猪最后发病;发病率和死亡率与猪的种类、日龄密切相关,育肥猪和母猪发病后仅出现腹泻症状而不死亡,仔猪发病后腹泻症状明显而且死亡率随着年龄的增长急剧下降,3日龄以下仔猪死亡率可达100%,1周龄仔猪死亡率降至72.73%,12日龄仔猪死亡率仅有10%。对猪场风险因素分析表明,饲料车辆直接进入猪场、卖猪车辆与饲养人员接触、粪便通道没有封闭、饲养人员流动等是影响此次腹泻疫情的高风险因素,通过降低高风险因素很好地控制了疫病。 相似文献
4.
为了有效防控连云港市规模猪场新生仔猪腹泻,本研究对其辖区内50头以上的规模猪场进行了流行病学调查和主要病因分析。结果显示:致病性大肠杆菌是主要的细菌病病原体,猪流行性腹泻病毒(Porcine epidemic diarrhea virus,PEDV)、猪传染性胃肠炎病毒(Transmissible gastroenteritis of pigs,TGEV)、猪轮状病毒(Porcine Rotavirus,PROV)为主要的病毒病病原体。上述研究为连云港市甚至国内其他猪场的新生仔猪腹泻的防控提供了科学依据。 相似文献
5.
在现代化养猪生产中,仔猪腹泻很常见,也是非常难防控的老大难问题,其发生普遍、原因复杂损失巨大仔猪腹泻可由多方面原因引起,从病原角度看,多为菌群失调造成,母猪奶水不足、仔猪不能吃足母乳等均可引发仔猪菌群失调从而导致腹泻。许多研究证明,引起仔猪腹泻的重要病原有致病性大肠杆菌、猪传染性胃肠炎病毒、猪流行性腹泻病毒和猪轮状病毒。现针对大庆某猪场腹泻仔猪进行的病原学 相似文献
6.
四川某猪场发生10日龄内仔猪严重腹泻、呕吐疫情,发病率达80%,死亡率高达70%。为确诊病原,无菌采集腹泻致死仔猪的肝脏、十二指肠内容物及肠系膜淋巴结进行实验室检测。经分离、培养和鉴定,在十二指肠内容物中分离到大肠杆菌,致病性试验结果表明所分离大肠杆菌可在12小时左右致死小鼠。对提取的肠系膜淋巴结总RNA进行针对猪传染性胃肠炎（TGE）病毒的特异性RT-PCR检测,结果传染性胃肠炎病毒（TGEV）为阳性。根据临床症状、病理变化、病原检测综合判定本次疾病流行的主要病因为传染性胃肠炎病毒继发大肠杆菌感染。 相似文献
7.
正引起哺乳仔猪腹泻的因素很多,但近年笔者对驻马店规模猪场流行病学调查和病原检测发现,引起该地区哺乳仔猪腹泻的主要病因是由猪流行性腹泻造成的。目前该病全群性发病情况减少,发病阶段主要集中于哺乳仔猪,特别是7日龄内哺乳仔猪发病率更高,死亡率接近100%。猪场一旦受到病原污染,常呈周期性暴发,且发病持续时间长,有的甚至持续3个月以上,给猪场造成了重大经济损失。现将某猪场哺乳仔猪发生猪流行性 相似文献
8.
本文研究了从江苏、上海、北京八个县十七个猪场新生仔猪腹泻分离到的大肠杆菌的抗原结构和肠道病原性,从其中十四个猪场分离到K_(88)~+肠道病原性大肠杆菌。在这十四个猪场,从40窝67头腹泻仔猪得到212个大肠杆菌分离物,其中来自26窝41头病猪的146个(68.9％)大肠杆菌分离物是具有K_(88)抗原的,它们的代表菌株在仔猪结扎肠试验中均表现肠道病原性。随猪场不同,这146个K_(88)~+分离物分属于6个O抗原型(O_(60)、O_(149)、O_(157)、O_9和一个未定型)。其中,以O_(60)在江苏、上海为最常见,这是一个国外未见报道的含K_(88)抗原的大肠杆菌的O抗原型。调查还发现了一种非大肠杆菌性的新生仔猪腹泻。为此,本文还对“仔猪黄痢”“新生仔猪腹泻”的定义问题进行了讨论。 相似文献
9.
正疫苗预防是目前预防仔猪细菌性腹泻最为有效的方法。母猪产前接种大肠杆菌灭活疫苗,母猪产生的抗腹泻抗体可以通过初乳传递给仔猪。仔猪腹泻是集约化养猪生产条件下仔猪的一种典型的常见疾病,是冬春季河南地区猪场最严重的仔猪疾病之一,也是导致仔猪高死亡率主要原因之一。该病病因复杂,常表现为多因素相互作用,多种病原交叉混合感染,因此临床诊断和防治非常困难,常常导致仔猪的大量死亡。笔者根据多年的兽医技术服务经验, 相似文献
10.
正河北秦皇岛某猪场仔猪出现腹泻症状,起初认为是轮状病毒或流行性腹泻引起,经实验室检测,结果显示阴性,根据检测结果及猪场使用药物的结果,分析得出引发该猪场发病的主要病因是营养性腹泻。仔猪腹泻在目前的中小型猪场里是非常的普遍,而且病因有多种,包括细菌、病毒及营养等因素,仔猪腹泻脱水,引起大批量的死亡,给猪场带来了较大的经济损失。在秦皇岛某猪场内部同样出现了仔猪腹泻的情况,希望给广大养殖户提供相应的参考,情况如下:1发病情况秦皇岛某猪场,存栏150头母猪,2019年9月底产房仔猪8日龄左右出现腹泻的现象,短期内死亡 相似文献
11.
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
13.
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
15.
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
16.
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
17.
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
18.
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
19.
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
20.
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
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