Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, Finland.
Epidemiol Infect. 2011 Dec;139(12):1919-27. doi: 10.1017/S0950268810003018.
A survey of 788 pigs from 120 farms was conducted to determine the within-farm prevalence of pathogenic Yersinia enterocolitica and a questionnaire of management conditions was mailed to the farms afterwards. A univariate statistical analysis with carriage and shedding as outcomes was conducted with random-effects logistic regression with farm as a clustering factor. Variables with a P value <0·15 were included into the respective multivariate random-effects logistic regression model. The use of municipal water was discovered to be a protective factor against carriage and faecal shedding of the pathogen. Organic production and buying feed from a certain feed manufacturer were also protective against total carriage. Tonsillar carriage, a different feed manufacturer, fasting pigs before transport to the slaughterhouse, higher-level farm health classification, and snout contacts between pigs were risk factors for faecal shedding. We concluded that differences in management can explain different prevalences of Y. enterocolitica between farms.
对 120 个农场的 788 头猪进行了调查，以确定农场内致病性肠炎耶尔森菌的流行情况，随后向这些农场邮寄了一份管理条件问卷。使用随机效应逻辑回归对带有携带和脱落作为结果的单变量统计分析，以农场为聚类因素。P 值<0.15 的变量被纳入相应的多变量随机效应逻辑回归模型。使用城市水被发现是携带和粪便脱落病原体的保护因素。有机生产和从特定饲料制造商购买饲料也可以防止携带总数。扁桃体携带、不同的饲料制造商、在运往屠宰场之前对猪禁食、更高水平的农场健康分类以及猪之间的口鼻接触是粪便脱落的危险因素。我们得出结论，管理上的差异可以解释农场之间肠炎耶尔森菌流行率的不同。
