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1.
鸡慢性呼吸道疾病是鸡的一种常见、多发病。各种日龄的鸡均可感染发病。该病是由鸡毒支原体引起的一种接触性呼吸道传染病。这种支原体在鸡群中普遍存在，可垂直传播．病程长。病变发展缓慢。 相似文献
2.
冬春季节,病原极易繁殖,鸡易感染呼吸道疾病。鸡的呼吸道病有很多种类,有的是由病毒引起的,有的是由细菌和支原体引起的,各种日龄的鸡均可感染,而且发病率高,还容易引起其他疾病的继发感染或混合感染。鸡群发病时,从鸡群的临床症状很难确定所发生呼吸道疾病的种类,给治疗带来一定的困难。现介绍鸡慢性呼吸道疾病的症状鉴别与防治方法,希望大家能了解此类疾病,并坚持预防为主,养防结合,防重于治的方针,做好养鸡生产工作。 相似文献
3.
冬季是鸡呼吸道疾病的高发期,许多传染性疾病均会引起呼吸道症状,鸡群若出现呼噜、喘息、咳嗽、甩鼻、喷嚏等呼吸道症状,会引起产蛋量下降,畸形蛋增多,死淘率增高.本病又称鸡败血霉形体病、鸡败血支原体病,其病原是败血霉形体.它可感染鸡和火鸡等家禽.各种日龄的禽类均可感染,但以寒冬和早春最为严重.全年各季均可发生,但以寒冬及早春最为严重.如单纯败血霉形体感染,一般只有轻度呼吸道症状,此时的发病率高,但死亡一般只有10~30%.本病在老疫区和老鸡场(舍)常呈隐性经过. 相似文献
4.
当前,在养鸡生产中鸡的呼吸道病是比较复杂的,疾病的种类也很多,是不容忽视的一类疾病。各种日龄的鸡均可感染,发病率高而且容易引起多种疾病的继发感染,引起雏鸡生长发育迟缓,成年鸡产蛋下降和各种日龄的鸡只死亡。由于这些呼吸道疾病从临床症状和鸡群的表现上都很相似,给诊断带来一定的困难。为此在临床上必须做好鉴别诊断。 相似文献
5.
近年来 ,随着养鸡业向集约化、规模化发展 ,养鸡场、养鸡大户越来越多。但是在养鸡生产过程中 ,常常遇到鸡群发生呼吸道疾病 ,鸡只不仅生长发育受影响 ,而且因死亡及耗用药物造成经济上严重损失。引起鸡群出现呼吸道病状的原因很多 ,养鸡工作者在作出诊断和类症鉴别时往往感到困难。笔者就常见鸡群有呼吸道症状的各种鸡病主要临床症状、病理变化及防治措施简述如下。1 慢性呼吸道病1 1 病原慢性呼吸道病又称鸡败血霉形体病 ,其病原是鸡败血霉形体。1 2 流行特点鸡与火鸡易感 ,鹧鸪、鸽、孔雀等珍禽亦可感染。全年均可发病 ,尤以冬春季… 相似文献
6.
鸡呼吸道疾病危害巨大,一方面是各种日龄的鸡均可感染,另一方面是发病率高而且容易引起多种疾病的继发感染.仅从临床症状和鸡群的表现上很难确定引发呼吸道疾病的原冈,给诊断带来一定的困难.为帮助大家现场作出初步诊断,现将几种常见的呼吸道疾病介绍如下. 相似文献
7.
鸡呼吸道疾病的种类很多,有的是由病毒引起的,有的是由细菌和支原体引起的。鸡呼吸道疾病之所以要引起重视,一方面是该类病经常发生,各种日龄的鸡只均可感染;另一方面是发病率高而且容易引起多种疾病的继发感染。鸡群发病时,从临床症状和鸡群的表现上很难确定发生的是哪一种呼吸道疾病,给治疗带来一定的困难。 一、鸡慢性呼吸道疾病 该病是由鸡支原体引起的一种呼道疾病。在正常的情况下,这种支原体不会引起鸡群发病。支原体引起鸡群发病,必须具有一定的条件,或者说必须在多种应激因素的作用下,才可能发生。 (一)引起发病… 相似文献
8.
春天正是育雏的好时机,但由于对雏鸡一味保温而忽视通风,会造成鸡群上呼吸道感染而引发呼吸道疾病,今春有几户养殖户鸡群发生呼吸道疾病,诊断为肾型传染性支气管炎。此病各季均可发生,仅发生于鸡,其他家禽不感染。 相似文献
9.
鸡群呼吸道疾病是指在商品化生产条件下,以病毒、细菌、支原体、免疫抑制病病原和不利环境因素等多种原因引起并发或混合感染的呼吸道病。该病成为许多农村养殖户和集约化养鸡场的常见病和多发病,各种日龄的鸡均可发生,在冬春季多发,不仅严重影响了鸡的生产性能,而且造成相当数量的鸡的死亡,在很多鸡群中占整个疾病造成损失的一半以上。 相似文献
10.
鸡慢性呼吸道疾病是由鸡败血霉形体引起的一种传染病,鸡的发病特征是咳嗽、打喷嚏和气管发啰音等,成年鸡患病后多呈隐性感染。本病在许多鸡群中长期存在。鸡慢性呼吸道疾病可导致免疫抑制,其易与大肠杆菌等合并感染而导致严重的呼吸道症状。 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 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 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
17.
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
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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