Risk Assessment and Analytics Staff, Office of Public Health Science, Food Safety and Inspection Service, USDA, 2150 Centre Avenue, Building D, Fort Collins, CO 80526, United States.
Risk Assessment and Analytics Staff, Office of Public Health Science, Food Safety and Inspection Service, USDA, 2150 Centre Avenue, Building D, Fort Collins, CO 80526, United States.
Int J Food Microbiol. 2015 Sep 2;208:114-21. doi: 10.1016/j.ijfoodmicro.2015.05.018. Epub 2015 May 29.
The proportion of Campylobacter contaminated food and water samples collected by different surveillance systems often exhibit seasonal patterns. In addition, the incidence of foodborne campylobacteriosis also tends to exhibit strong seasonal patterns. Of the various product classes, the occurrence of Campylobacter contamination can be high on raw poultry products, and chicken is often thought to be one of the leading food vehicles for campylobacteriosis. Two different federal agencies in the United States collected samples of raw chicken products and tested them for the presence of Campylobacter. During the same time period, a consortium of federal and state agencies operated a nationwide surveillance system to monitor cases of campylobacteriosis in the United States. This study uses a common modeling approach to estimate trends and seasonal patterns in both the proportion of raw chicken product samples that test positive for Campylobacter and cases of campylobacteriosis. The results generally support the hypothesis of a weak seasonal increase in the proportion of Campylobacter positive chicken samples in the summer months, though the number of Campylobacter on test-positive samples is slightly lower during this time period. In contrast, campylobacteriosis cases exhibit a strong seasonal pattern that generally precedes increases in contaminated raw chicken. These results suggest that while contaminated chicken products may be responsible for a substantial number of campylobacteriosis cases, they are most likely not the primary driver of the seasonal pattern in human illness.
不同监测系统采集的受弯曲杆菌污染的食物和水样的比例通常呈现出季节性模式。此外，食源性弯曲杆菌病的发病率也往往呈现出很强的季节性模式。在各种产品类别中，生禽产品中弯曲杆菌污染的发生率可能很高，而鸡肉通常被认为是弯曲杆菌病的主要食物载体之一。美国的两个不同联邦机构采集了生禽产品的样本并检测了其中弯曲杆菌的存在。在同一时期，一个联邦和州机构的联盟运营了一个全国性的监测系统，以监测美国的弯曲杆菌病病例。本研究使用一种常见的建模方法来估计生禽产品中弯曲杆菌阳性样本的比例和弯曲杆菌病病例的趋势和季节性模式。结果普遍支持夏季生禽样本中弯曲杆菌阳性比例略有增加的假设，但在此期间，检测阳性样本中的弯曲杆菌数量略低。相比之下，弯曲杆菌病病例呈现出很强的季节性模式，通常先于受污染的生禽数量增加。这些结果表明，虽然受污染的鸡肉产品可能导致大量的弯曲杆菌病病例，但它们不太可能是人类疾病季节性模式的主要驱动因素。
