冬季常见鸡呼吸道病的防治

随着冬季的来临，养鸡生产过程中。经常遇到鸡呼吸道病，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症的原因很多，鸡舍的通风、温度及湿度之间的矛盾，使鸡在冬季长期处于缺氧、低温、高湿、高氨、高二氧化碳的恶劣环境之中，导致鸡抵抗能力降低、易患疾病，特别是呼吸道疾病。养鸡者在作出诊断和类似病症鉴别时往往感到困难。现就冬季常见的鸡呼吸道病主要临床症状、病理变化及防治措施简述如下：     

冬季常见鸡呼吸道病的防治

随着冬季的来临,养鸡生产过程中,经常遇到鸡呼吸道病,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症的原因很多,养鸡者在作出诊断和类症鉴别时往往感到困难。现就冬季常见的各种鸡呼吸道病主要临床症状、病理变化及防治措施简述如下     

冬季鸡常见呼吸道病防治措施

随着冬季的来临,养鸡生产过程中,经常遇到鸡呼吸道病,鸡只不仅生长发育受影响,而且因鸡只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症的原因很多,养鸡者在作出诊断和类症鉴别时往往感到困难。现就冬季常见的各种鸡呼吸道病主要临床症状、病理变化及防治措施简述     

冬季鸡呼吸道病的防治

冬季是鸡呼吸道病的高发季节,发病鸡群不仅生长发育受影响,而且因死亡或长期投药会对养殖造成很大经济损失,养殖户应注意加强这方面的预防措施.     

冬季鸡只呼吸道病的防治

冬季是禽呼吸道病的高发季节,也是危害养鸡业最严重的疾病之一,它一般是由多个因素所致,其中包括病毒、细菌、支原体、免疫抑制因子及不利的环境条件,此外,日常的免疫计划本身引起的呼吸道反应对呼吸道疾病的发生也可起重要作用。以上复杂因素的存在使得呼吸道病一直是困扰养殖户的难题。下面,笔者就一例病毒病、慢性呼吸道病与大肠杆菌病混合感染的病例为例,简单地就冬季鸡只呼吸道病的防治谈一下个人看法。     

冬季常见鸡病的防治

冬季,鸡舍较好的保温措施为病毒和细菌提供了良好的生存、繁殖及传播条件。与此同时,鸡舍的通风、温度及湿度之间的矛盾,使鸡在冬季长期处于缺氧、低温、高湿、高氨的恶劣环境之中,导致鸡群抵抗能力降低,易患疾病,特别是呼吸道疾病。     

冬季注意防治鸡呼吸道病

冬季是鸡呼吸道疾病的高发季节，这主要源于冬季鸡舍通风和保暖之间的矛盾。鸡呼吸道疾病种类很多，常见且有明显呼吸道症状或以表现呼吸道症状为主的疾病有：传染性喉气管炎、传染性支气管炎、传染性鼻炎、慢性呼吸道病、新城疫、禽霍乱、白喉型鸡痘、禽衣原体病、曲霉菌病等。此外，一些弱毒疫苗的使用所引起的反应，     

冬季如何防治鸡呼吸道病

冬季是鸡呼吸道疾病的高发季节，这主要源于冬季鸡舍通风和保暖之间的一对矛盾。鸡呼吸道疾病种类很多，常见且有明显呼吸道症状或以表现呼吸道症状为主的疾病有：传染性喉气管炎、传染性支气管炎、传染性鼻炎、慢性呼吸道病、新城疫、禽霍乱、白喉型鸡痘、禽衣原体病、曲霉菌病等。此外，一些弱毒疫苗的使用所引起的反应，如传染性支气管炎弱毒疫苗、鸡新城疫I系苗、传染性喉气管炎弱毒疫苗、法氏囊疫苗等也会导致鸡出现呼吸道异常反映。引起这些疾病发生的原因，有时为微生物造成，有的为疫苗接种反应或饲养管理不当引起，因而对于鸡呼道疾病应采取综合防治措施。     

冬季如何防治鸡呼吸道病

冬季是鸡呼吸道疾病的高发季节，其主要源于冬季鸡舍通风和保暖之间的一对矛盾。鸡呼吸道疾病种类很多，常见且有明显呼吸道症状或以表现呼吸道症状为主的疾病有：传染性喉气管炎、传染性支气管炎、传染性鼻炎、慢性呼吸道病、新城疫、禽霍乱、白喉型鸡痘、禽衣原体病、曲霉菌病等。此外，一些弱毒疫苗的使用所引起的反应，如传染性支气管炎弱毒疫     

鸡发生呼吸道病的原因及防治措施

在养鸡生产中。鸡呼吸道疾病多数是由多重原因协同作用而导致的疾病,必须采取综合性防治措施。     

冬季猪群呼吸道疾病的防制要点

进入冬季以来,大部分猪场的猪只出现呼吸道疾病的情况比较严重,特别是北方地区,部分怀孕母猪和育肥猪群晚上干咳严重,呼吸相对紧促,个别猪只出现少许清澈鼻涕,白天     

Adenovirus infection associated with respiratory disease in commercial chickens

The lesions and etiologic agents associated with 13 outbreaks of respiratory disease in commercial chickens were investigated. Adenoviruses were isolated from tracheal and lung tissues of affected chickens in all 13 outbreaks. Escherichia coli was isolated from the lung of an occasional bird. The tracheal specimens were consistently negative for Bordetella avium, but E. coli and occasionally Staphylococcus aureus were isolated. There was also serological evidence in one outbreak, and pathological evidence in another, of a concurrent infectious bursal disease virus (IBDV) infection of chickens affected with the disease. Gross and microscopic alterations in the tracheas and lungs of affected chickens were similar in all outbreaks and consisted of catarrhal tracheitis and occasionally multifocal pneumonia with mononuclear cell infiltrates. Hepatitis and splenitis with heterophil infiltrates occasionally were seen in birds with coliform septicemia. The tracheal and lung lesions in the present investigation were considered primarily of adenovirus etiology, complicated by secondary bacterial infection.     

冬季鸡群的饲养与管理

冬季气温比较低，气温变化无常，是慢性呼吸道疾病的多发季节。冷应激将会给鸡的饲养管理带来一定的困难。如果不能做到及时处理，轻者会造成鸡产蛋率的下降及生长受阻，重者会造成鸡只的死亡．严重影响经济效益。因此，加强寒冷季节鸡的饲养管理．提高鸡群的产蛋率，对提高养鸡经济效益至关重要。     

Factors affecting the development of respiratory disease complex in chickens

Factors playing a part in the development of respiratory disease complex in chickens were investigated in a series of experiments. The experimental infection was produced by exposing chickens to Mycoplasma gallisepticum and the B1 vaccine strain of Newcastle disease virus and later exposing them to aerosols containing the O1:K1 serotype of Escherichia coli. Chickens became susceptible (pericarditis or death) to E. coli 8 days after mixed respiratory disease challenge. One day after respiratory disease challenge, lesions consisted of edema and infiltration with lymphoid cells and heterophils. At the time of susceptibility to E. coli, the lesions were strongly lymphoid with many dense follicular areas and very few heterophils. The incidence of pericarditis and death was similar when the concentration of bacteria in the aerosol inoculum ranged between 10(9)/ml and 10(5)/ml. At the time of maximum susceptibility to aerosol challenge, chickens were less susceptible to intravenously administered E. coli than were the uninfected controls. Resistance of chickens that had been selectively bred for a high (HA) or low (LA) antibody response to sheep erythrocytes was compared. HA chickens were more resistant to respiratory agents and less resistant to E. coli than LA line chickens. When the lines were exposed to respiratory disease followed by exposure to aerosols containing E. coli, the HA line had the lowest incidence of pericarditis and death.     

浅谈冬春季节猪呼吸道病的综合防制

猪呼吸道病种类繁多,致病因素复杂,临床症状不一,病程长,疗程久,是养猪专业户和集约化猪场冬、春季节最常见、最棘手的疾病,防治不当往往会造成严重损失[1].     

鸡传染性喉气管炎的防治

传染性喉气管炎(ILT)是由A型疱疹病毒引起的鸡的一种急性呼吸道传染病。1936年由Beaudette首次证明其病原是一种滤过性病毒。目前此病在许多国家广泛流行,是危害养鸡业的重要疾病,近几年来,在我国一些养鸡集中的地区,ILT引起产蛋鸡产蛋下降和鸡群的高死亡率,产蛋率一般下降10%～50%,死亡率一般在5%～70%之间,给养鸡业带来巨大经济损失,现将实践中对该病的诊断、治疗经验及防制要点总结如下。1流行特点鸡是ILT感染的主要自然宿主,各种日龄的鸡均可感染,以4～10月龄的成年鸡最为严重,对产蛋高峰期的鸡特别易感且危害大;从鸡品种来看,以褐…