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为查明2021年四川省甘孜州某藏绵羊养殖场呼吸道疾病的发病病因,本研究采用PCR方法对送检的5份深部鼻腔棉拭子进行了“山羊副流感病毒3型、牛病毒性腹泻-黏膜病病毒、牛冠状病毒、多杀性巴氏杆菌、溶血性曼氏杆菌、绵羊肺炎支原体、丝状支原体簇成员”等常见呼吸道病原的检测。结果显示：多杀性巴氏杆菌和溶血性曼氏杆菌为阳性,其他病原为阴性;通过细菌分离培养成功获得5株溶血性曼氏杆菌和5株多杀性巴氏杆菌;分型结果显示5株溶血性曼氏杆菌为A2型,5株多杀性巴氏杆菌为D型。结合临床症状,确诊该场藏绵羊的呼吸道疾病是由A2型溶血性曼氏杆菌和D型多杀性巴氏杆菌混合感染所致。 相似文献
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某奶牛场犊牛相继发生肺炎和关节炎,为确诊该牛场犊牛群发病的原因并提出防控方案,本试验剖检新生犊牛并采集病料,分别开展牛支原体及其他病原菌的分离培养、PCR鉴定及药敏分析;进行牛病毒性腹泻病毒、牛口蹄疫病毒和牛传染性鼻气管炎病毒PCR检测;制作犊牛肺脏组织病理切片并进行观察和评估。从犊牛肺脏组织分离到牛支原体和牛A型多杀性巴氏杆菌;牛病毒性腹泻病毒、牛口蹄疫病毒和牛传染性鼻气管炎病毒检测均为阴性;肺脏组织病理切片可见肺泡结构破坏、出血及大量炎性细胞浸润;药敏试验结果显示,牛支原体和牛A型多杀性巴氏杆菌分别对泰乐菌素和头孢唑啉敏感,但对青霉素、庆大霉素、林可霉素和氨苄西林均呈现耐药。该犊牛群确诊为牛支原体肺炎继发牛A型多杀性巴氏杆菌感染,采用泰乐菌素联合头孢唑啉肌肉注射,配合对症治疗和规范管理,有效控制了该场犊牛疾病。 相似文献
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近年来,我国部分地区奶牛场发生了以流黏性鼻液为主要症状的呼吸道疾病,经检测,排除牛支原体、牛巴氏杆菌感染。为探究其主要病毒性病原,从山东等4省(市)5家表现临床症状的奶牛场采集发病牛与无症状牛鼻拭子样品298份,开展牛传染性鼻气管炎病毒(IBRV)、牛病毒性腹泻病毒(BVDV)和牛副流感病毒3型(BPIV3)PCR检测。结果显示:发病奶牛场IBRV与BVDV阳性率分别为28.9%、7.1%,BPIV3未检出;发病牛与无症状牛IBRV阳性率分别为42.6%、10.9%,BVDV阳性率分别为11.3%、1.6%;IBRV、BVDV混合感染率为5.7%,IBRV、BVDV混合感染占IBRV总感染数的19.8%,占BVDV总感染数的81.0%。结果表明,引起这些奶牛场呼吸道症状的主要病原可能为IBRV、BVDV,且混合感染较严重。本研究为奶牛场呼吸道疾病防控提供了依据。 相似文献
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四川省某肉牛场新引进的犊牛出现发热、咳嗽、呼吸困难、流鼻涕等呼吸道症状,为了解该病的病因,本试验采集了10份病牛深部鼻腔棉拭子样本,采用PCR方法检测了牛冠状病毒（BCoV）、牛病毒性腹泻病毒（BVDV）、牛传染性鼻气管炎病毒（IBRV）、牛腺病毒3型（BAV-3）、牛支原体（M.Bovis）、多杀性巴氏杆菌（P.multocida）、溶血性曼氏杆菌（M.haemolytica）及睡眠嗜组织菌（H.somni）等8种常见呼吸道病原。结果显示：BCoV检出率为70%,BVDV检出率为30%,其余病原均未检出,表明该肉牛场犊牛的呼吸道疾病是由BCoV和BVDV混合感染引起的。 相似文献
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为了解广西地区牛呼吸道疾病综合征（bovine respiratory disease complex，BRDC）的病原情况，本研究通过RT-PCR/PCR方法和细菌分离鉴定方法对2016-2017年送检的117份患有呼吸道疾病的病料进行病原诊断，并对主要分离菌进行药物敏感性试验。结果显示，RT-PCR/PCR方法检测的肺炎克雷伯氏菌、牛支原体、化脓隐秘杆菌、多杀性巴氏杆菌、牛传染性鼻气管炎病毒（IBRV）、溶血性曼氏杆菌的检出率分别为41.0%（48/117）、28.2%（33/117）、20.5%（24/117）、15.4%（18/117）、12.8%（15/117）、5.1%（6/117），而细菌分离鉴定方法检测的肺炎克雷伯氏菌、大肠杆菌、牛支原体、化脓隐秘杆菌、多杀性巴氏杆菌、溶血性曼氏杆菌的检出率分别为41.0%（48/117）、33.3%（39/117）、17.1%（20/117）、7.7%（9/117）、2.6%（3/117）、2.6%（3/117），牛副流感病毒3型、牛呼吸道合胞体病毒和牛病毒性腹泻病毒未检出，且PCR方法更敏感。药敏试验结果显示，20株牛支原体对β-内酰胺类、磺胺类、多肽类药物的耐药率为90.0%~100.0%，对喹诺酮类、庆大霉素、阿米卡星和卡那霉素敏感（耐药率为在10.0%~25.0%）；30株大肠杆菌和30株肺炎克雷伯氏菌除了对头孢噻肟、头孢曲松和头孢他啶敏感外（耐药率分别为13.3%~20.0%、10.0%~30.0%），对其他15种药物均具有耐药性（耐药率分别为50.0%~100.0%、40.0%~100.0%）。综上所述，广西地区牛呼吸道疾病主要以牛支原体、大肠杆菌和肺炎克雷伯氏菌引发的混合感染为主，且分离菌均已出现不同程度的耐药性。 相似文献
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为弄清贵州某野生动物园长臂猿死亡的原因,本试验采用流行病学调查、临床症状观察、病理剖检诊断和RT-PCR检测确诊等方法,对该野生动物园发病长臂猿进行了诊断。试验结果显示,流行病学调查、剖检病理初步诊断该野生动物园长臂猿疑似流感病毒、支原体和细菌混合感染,RT-PCR/PCR检测确诊发病长臂猿为流感病毒、支原体混合感染,细菌分离培养、生化特性鉴定和动物致病性试验确诊为多杀性巴氏杆菌感染。结果表明造成该野生动物园长臂猿发病死亡的原因为流感病毒、支原体和多杀性巴氏杆菌混合感染。根据诊断及药敏试验结果,制定出了免疫预防及治疗措施。 相似文献
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叶峻岐 《畜牧兽医科技信息》2019,(4):123-123
呼吸道疾病是猪的常见疾病,多发生于春季,为此饲养人员在春季要做好预防措施,并针对猪呼吸道疾病采相应的治疗措施,避免不必要的经济损失。1发病原因猪呼吸道疾病多为细菌与病毒共同引起,主要有肺炎支原体、伪狂犬病病毒、流感病毒、圆环病毒2型、猪繁殖与呼吸综合征病毒;多杀性巴氏杆菌、附红细胞体、副嗜血杆菌、猪链球菌等。同时环境因素、管理因素、药源性因素等都可以引发猪呼吸道疾病等。 相似文献
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Srikumaran S Kelling CL Ambagala A 《Animal health research reviews / Conference of Research Workers in Animal Diseases》2007,8(2):215-229
Bovine respiratory tract disease is a multi-factorial disease complex involving several viruses and bacteria. Viruses that play prominent roles in causing the bovine respiratory disease complex include bovine herpesvirus-1, bovine respiratory syncytial virus, bovine viral diarrhea virus and parinfluenza-3 virus. Bacteria that play prominent roles in this disease complex are Mannheimia haemolytica and Mycoplasma bovis. Other bacteria that infect the bovine respiratory tract of cattle are Histophilus (Haemophilus) somni and Pasteurella multocida. Frequently, severe respiratory tract disease in cattle is associated with concurrent infections of these pathogens. Like other pathogens, the viral and bacterial pathogens of this disease complex have co-evolved with their hosts over millions of years. As much as the hosts have diversified and fine-tuned the components of their immune system, the pathogens have also evolved diverse and sophisticated strategies to evade the host immune responses. These pathogens have developed intricate mechanisms to thwart both the innate and adaptive arms of the immune responses of their hosts. This review presents an overview of the strategies by which the pathogens suppress host immune responses, as well as the strategies by which the pathogens modify themselves or their locations in the host to evade host immune responses. These immune evasion strategies likely contribute to the failure of currently-available vaccines to provide complete protection to cattle against these pathogens. 相似文献
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Study on the etiologic role of bovine respiratory syncytial virus in pneumonia of dairy calves 总被引：6，自引：0，他引：6
J C Baker R E Werdin T R Ames R J Markham V L Larson 《Journal of the American Veterinary Medical Association》1986,189(1):66-70
Bovine respiratory syncytial virus (BRSV) was the viral agent most commonly identified in 14 epizootics of pneumonia in dairy calves. A microtiter serum-virus neutralization test proved to be the best means of identifying involvement of BRSV; seroconversion (fourfold or greater rise in titer) was demonstrated in 10 of the 14 epizootics. Only limited involvement of bovine viral diarrhea virus, infectious bovine rhinotracheitis virus, parainfluenza 3 virus, and bovine adenovirus type 3 was recognized. Pasteurella multocida was isolated in 12 of 14 epizootics, and Pasteurella haemolytica in 4 of 14 epizootics. Mycoplasmal and ureaplasmal agents were isolated in all 14 epizootics. 相似文献
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Härtel H Nikunen S Neuvonen E Tanskanen R Kivelä SL Aho R Soveri T Saloniemi H 《Acta veterinaria Scandinavica》2004,45(3-4):193-200
Pathogens causing bovine respiratory tract disease in Finland were investigated. Eighteen cattle herds with bovine respiratory disease were included. Five diseased calves from each farm were chosen for closer examination and tracheobronchial lavage. Blood samples were taken from the calves at the time of the investigation and from 86 calves 3-4 weeks later. In addition, 6-10 blood samples from animals of different ages were collected from each herd, resulting in 169 samples. Serum samples were tested for antibodies to bovine parainfluenza virus-3 (PIV-3), bovine respiratory syncytial virus (BRSV), bovine coronavirus (BCV), bovine adenovirus-3 (BAV-3) and bovine adenovirus-7 (BAV-7). About one third of the samples were also tested for antibodies to bovine virus diarrhoea virus (BVDV) with negative results. Bacteria were cultured from lavage fluid and in vitro susceptibility to selected antimicrobials was tested. According to serological findings, PIV-3, BAV-7, BAV-3, BCV and BRSV are common pathogens in Finnish cattle with respiratory problems. A titre rise especially for BAV-7 and BAV-3, the dual growth of Mycoplasma dispar and Pasteurella multocida, were typical findings in diseased calves. Pasteurella sp. strains showed no resistance to tested antimicrobials. Mycoplasma bovis and Mannheimia haemolytica were not found. 相似文献
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Mycoplasma agalactiae subsp. bovis in pneumonia and arthritis of the bovine. 总被引：1，自引：1，他引：0 
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下载免费PDF全文 E V Langford 《Canadian journal of veterinary research》1977,41(1):89-94
The pneumonic lungs of 42 cattle from 26 feedlots were examined for the presence of mycoplasma, pathogenic bacteria and viruses. Four animals representative of two lots failed to yield mycoplasma. One of these yielded the virus of infectious bovine rhinotracheitis and Pasteurella hemolytica, the other yielded only P. P. multocida. Nine animals in eight lots yielded Mycoplasma sp.: five of these were M. bovirhinis, two were M. arginini and two were untypable. All of these animals yielded one or more of P. hemolytica, P. multiocida, infectious bovine rhinotracheitis virus or bovine virus diarrhea virus. Twenty-five of 29 animals in 16 lots yieled M. agalactiae subsp. bovis from lung tissues. The same organism was recovered from the arthritic joints of 12 of these animals. Eight of the 25 animals yielded no other pathogen and all of these had not received any treatment. Nine of the 25 M. agalactiae subsp. bovis positive animals also yielded one or more of P. hemolytica, P. multocida, Corynebacterium pyogenes or infectious bovine rhinotracheitis virus. Bacteriological and virological studies were not completed for the remaining eight of the 25 positive animals. In five lots of cattle which had not received medication for pneumonia and for arthritis only M. agalactiae subsp. bovis was recovered. Twenty-five grossly normal lungs obtained from normal cattle at the time of slaughter were cultured and all were negative. The possible role of M. agalactiae subsp. bovis in pneumonia and arthritis was discussed. 相似文献
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Nikunen S Härtel H Orro T Neuvonen E Tanskanen R Kivelä SL Sankari S Aho P Pyörälä S Saloniemi H Soveri T 《Comparative immunology, microbiology and infectious diseases》2007,30(3):143-151
Eighty-four calves with respiratory disease from 18 herds in different parts of Finland were chosen for a study evaluating the capacity of different respiratory pathogens to cause changes in different acute phase protein concentrations, white blood cell (WBC) count and clinical signs. The selected acute phase proteins were fibrinogen, haptoglobin, serum amyloid-A, lipopolysaccharide binding protein and alpha1-acid glycoprotein. From each calf, a paired blood sample was obtained for serological studies of bovine parainfluenza virus-3, bovine respiratory syncytial virus, bovine coronavirus, bovine adenovirus-3 and bovine adenovirus-7. Tracheobronchial lavage was performed to detect bacteria and mycoplasma. Isolation of Pasteurella multocida was associated with increased concentrations of all tested acute phase proteins. For other pathogens, no significant relationships were observed. No association was present between viral or bacterial findings and WBC count. 相似文献
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牛副流感病毒3型RT—PCR检测方法的建立 总被引：2，自引：0，他引：2
参照GenBank中公布的牛副流感病毒3型（Bovineparainfluenzavirus3,BPIV-3）全基因序列,针对BPIV-3特异性NP蛋白保守基因设计一对引物,建立了BPIV-3的RT—PCR诊断方法。其最佳扩增退火温度为58．1℃,引物浓度为1．0μmol／L。采用该方法扩增BPIV-3参考病毒．能扩增出425bp预期大小的特异性片段,而扩增牛病毒性腹泻／黏膜病病毒、牛传染性鼻气管炎病毒、牛合胞体病毒、猪瘟病毒以及牛支原体、大肠埃希氏菌、牛巴氏杆菌和沙门氏菌等常见病毒和细菌均呈阴性结果。对参考病毒进行梯度稀释检测,结果证明该法检测BPIV-3的灵敏度可达10^-3FCID50／0．1mL。 相似文献