National Veterinary Institute, SE-751 89 Uppsala, Sweden.
Prev Vet Med. 2010 Aug 1;96(1-2):114-21. doi: 10.1016/j.prevetmed.2010.05.007. Epub 2010 Jun 17.
Approximately 40% of Swedish broiler producers deliver Campylobacter-negative broilers in 90-100% of their flocks, showing that it is possible to produce Campylobacter-free broilers in Sweden. This study investigated risk factors associated with the presence of Campylobacter-positive flocks at Swedish broiler producers. A total of 37 producers, with 90 broiler houses including 144 compartments, participated in the study. An on-farm interview was performed to collect information on potential risk factors for Campylobacter infection in broilers, with questions about farmcharacteristics such as the environment around the farm and broiler houses, design of the broiler houses and on-farm management practices. Negative binomial regression models were used to assess the statistical significance of risk factors associated with the within-farm number of Campylobacter-positive flocks (the outcome). Campylobacter is transmitted in broiler flocks due to multiple factors and several potential sources, illustrating the complexity of Campylobacter epidemiology in broilers. Factors significantly associated with increased proportion of Campylobacter-positive flocks were the presence of other livestock on the farm, or the presence of cattle, swine, poultry or fur animals within 1km of the farm. Poor or average general tidiness were associated with increased proportion of Campylobacter-positive flocks, but decreased if split slaughter was seldom or never applied or if farm workers changed footwear twice or three times instead of once before entering the broiler house.
大约 40%的瑞典肉鸡生产者在其 90-100%的鸡群中提供无空肠弯曲菌的肉鸡，这表明在瑞典生产无空肠弯曲菌的肉鸡是可能的。本研究调查了与瑞典肉鸡生产者中空肠弯曲菌阳性鸡群存在相关的风险因素。共有 37 名生产者，90 个肉鸡舍，包括 144 个隔间，参与了这项研究。在农场进行了一次访谈，以收集有关肉鸡空肠弯曲菌感染潜在风险因素的信息，问题涉及农场特征，如农场周围的环境和肉鸡舍、肉鸡舍的设计以及农场管理实践。使用负二项回归模型来评估与农场内空肠弯曲菌阳性鸡群数量（结果）相关的风险因素的统计学意义。由于多种因素和几个潜在来源，空肠弯曲菌在肉鸡群中传播，这说明了肉鸡中空肠弯曲菌流行病学的复杂性。与空肠弯曲菌阳性鸡群比例增加显著相关的因素包括农场内有其他牲畜，或农场周围 1 公里范围内有牛、猪、家禽或毛皮动物。一般卫生条件差或一般与空肠弯曲菌阳性鸡群比例增加有关，但如果很少或从不采用分割屠宰，或者如果农场工人在进入肉鸡舍前换鞋两次或三次而不是一次，则卫生条件差或一般与空肠弯曲菌阳性鸡群比例减少有关。
