Malone F E, McCullough S J, McLoughlin M F, Ball H J, O'Hagan J, Neill S D
Veterinary Laboratory, Omagh, County Tyrone, Northern Ireland.
Vet Rec. 1988 Feb 27;122(9):203-7. doi: 10.1136/vr.122.9.203.
A two-year longitudinal, microbiological and pathological survey of respiratory disease in lambs housed for fattening at three-and-a-half to four months of age was undertaken. In the first year samples of nasal mucus and blood were taken from lambs each week for the first nine weeks after entry to a fattening unit and each week one lamb was examined post mortem. In the second year two additional fattening units were included in the survey, when samples of blood and nasal mucus were taken from lambs twice weekly for three weeks after entry and two lambs from each unit were examined post mortem eight to 11 days after entry to the unit. In both years the lambs had a nasal discharge and were coughing. Mycoplasma ovipneumoniae and Pasteurella haemolytica were the organisms most consistently isolated from the lungs, trachea and nasal mucus. Mycoplasma arginini and parainfluenza-3 virus were also isolated. Post mortem examination lesions of atypical, pasteurella-type and parasitic pneumonias were seen. In the second year an abattoir survey of pneumonia lesions was undertaken. Areas of pulmonary consolidation were seen in 27.5 per cent, bands of consolidation in 47.5 per cent and muellerius-type lesions in 28 per cent of the lungs examined. No significant correlation was found between the slaughter weights of the lambs and the extent of the lung lesions at slaughter.
对3.5至4月龄育肥羔羊的呼吸道疾病进行了为期两年的纵向微生物学和病理学调查。第一年，在羔羊进入育肥单元后的前九周，每周采集其鼻黏液和血液样本，并且每周对一只羔羊进行尸检。第二年，调查中增加了另外两个育肥单元，羔羊进入单元后，在三周内每周两次采集血液和鼻黏液样本，每个单元有两只羔羊在进入单元8至11天后进行尸检。在这两年中，羔羊均有鼻液流出且伴有咳嗽。绵羊肺炎支原体和溶血巴斯德菌是最常从肺、气管和鼻黏液中分离出的微生物。精氨酸支原体和副流感3型病毒也被分离出来。尸检可见非典型、巴氏杆菌型和寄生性肺炎的病变。第二年对屠宰场的肺炎病变进行了调查。在所检查的肺中，27.5%有肺实变区域，47.5%有实变带，28%有缪勒氏型病变。未发现羔羊的屠宰体重与屠宰时肺部病变程度之间存在显著相关性。
