猪胸膜肺炎放线杆菌感染的流行病学：安大略省猪肉生产商调查，1981年
Epidemiology of Haemophilus pleuropneumoniae infection in pigs: a survey of Ontario Pork Producers, 1981.
作者信息
Rosendal S, Mitchell W R
出版信息
Can J Comp Med. 1983 Jan;47(1):1-5.
Information about factors associated with the spread and the effect of pleuropneumonia was obtained from 418 pork producers in Ontario, who returned a mailed questionnaire. The overall herd prevalence of pleuropneumonia was 23.2%. The prevalence among herds with feeder pigs only was 34.3% and 16% among sow herds. The chance of pleuropneumonia breaking out in a herd was increased with increased traffic of pigs into the herd. The source of supplementary stock had an important effect on the chance of pleuropneumonia occurring. The highest risk resulted from introducing stock from salesbarns and the lowest from stock of health status known to the purchaser and supplied by one breeder only. Mortality, primarily among feeder pigs, and unthriftiness were the major effects of Haemophilus pleuropneumoniae infection. Stress, such as crowding or inclement climatic conditions, was associated with outbreaks of pleuropneumonia. This would suggest that the infection with H. pleuropneumoniae can be subclinical until stress precipitates the disease.
关于猪胸膜肺炎传播及影响因素的信息，是从安大略省418位养猪户那里获得的，他们回复了邮寄的调查问卷。胸膜肺炎在猪群中的总体流行率为23.2%。仅饲养育肥猪的猪群中流行率为34.3%，母猪群中为16%。随着进入猪群的猪的流量增加，猪群中爆发胸膜肺炎的几率也会增加。补充猪源对胸膜肺炎发生几率有重要影响。从销售场引进猪源导致的风险最高，而由仅一位饲养者供应且购买者已知其健康状况的猪源导致的风险最低。死亡率（主要发生在育肥猪中）和生长不良是胸膜肺炎放线杆菌感染的主要影响。应激，如拥挤或恶劣气候条件，与胸膜肺炎的爆发有关。这表明，在应激引发疾病之前，胸膜肺炎放线杆菌感染可能是亚临床的。
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