Hird D W, Carpenter T E, Snipes K P, Hirsh D C, McCapes R H
Department of Epidemiology and Preventive Medicine, School of Veterinary Medicine, University of California, Davis 95616.
Am J Vet Res. 1991 Feb;52(2):212-6.
From Aug 1985 through July 1986, 720 meat turkey flocks on 160 California premises were monitored and outbreaks of fowl cholera (Pasteurella multocida) were investigated. Data from 43 outbreak (case) flocks were compared with data from 43 nonoutbreak (control) flocks. Outbreak flocks, compared with control flocks, were more likely to be located on premises with higher maximal bird capacity and history of fowl cholera outbreaks. The overall impression was that flocks in larger, newer, more intensively managed premises were at greater risk of fowl cholera outbreaks than were other flocks.
从1985年8月至1986年7月，对加利福尼亚州160个养殖场的720群肉用火鸡进行了监测，并对禽霍乱（多杀性巴氏杆菌）疫情进行了调查。将43个疫情（病例）鸡群的数据与43个非疫情（对照）鸡群的数据进行了比较。与对照鸡群相比，疫情鸡群更有可能位于最大养鸡量较高且有禽霍乱疫情历史的养殖场。总体印象是，规模较大、较新、管理更集约化的养殖场中的鸡群比其他鸡群发生禽霍乱疫情的风险更高。
