肉鸡屠宰加工过程中空肠弯曲菌污染的监测与分析

目的 调查分析浙江金华地区肉鸡屠宰加工过程中空肠弯曲菌的污染现状及规律。方法 选择金华地区6家肉鸡屠宰加工企业, 通过直接计数法对空肠弯曲菌定性定量检测, 分析其流行病学规律。结果 采集的2139份样品中, 泄殖腔、脱毛、取内脏、消毒预冷、包装和速冻等环节样品的空肠弯曲菌阳性率分别为92.48%、83.39%、98.12%、79.31%、86.21%和77.45%, 空肠弯曲菌阳性数分别为12926.14±1821.84 CFU/g、379.01±67.44、856.66±206.27、110.57±19.52、138.01±76.5、67.90±46.79 CFU/100 cm2。总体上, 空肠弯曲菌阳性率和阳性数均呈现出先升高、后降低、再升高的变化规律, 大型企业的空肠弯曲菌污染情况较中小型企业要好。结论 所检测的6家肉鸡屠宰加工企业均被空肠弯曲菌污染, 大型企业应重视包装环节的生产工艺和卫生消毒, 中小型企业更要严格把控包装环节的操作规范, 提高脱毛和消毒预冷工艺。

Monitoring and analysis of Campylobacter jejuni contamination during slaughtering and processing of broilers

Objective To investigate and analyze the contamination status and regularity of Campylobacter jejuni during slaughtering and processing of broilers in Jinhua, Zhejiang province, China. Methods Six broiler slaughtering and processing enterprises in Jinhua were selected to detect C. jejuni contaminate on qualitatively and quantitatively by direct counting method, and the epidemiological trend was analyzed. Results Among the 2139 samples collected, the positive rates of C. jejuni in cloaca, dehairing, eviscerating, precooling, packaging and freezing were 92.48%, 83.39%, 98.12%, 79.31%, 86.21% and 77.45%. The positive number of C. jejuni were 12926.1±1821.84 CFU/g, 379.01±67.44, 856.66±206.27, 110.57±19.52, 138.01±76.5, 67.90±46.79 CFU/100 cm2. Totally, the positive rate and number of C. jejuni increased first, then decreased, and then increased again. The contamination of C. jejuni in large enterprises was better than that in small and medium enterprises. Conclusion Six broiler slaughtering and processing enterprises are all contaminated by C. jejuni. Large enterprises should pay more attention to the production process and disinfection in the packaging process. Small and medium enterprises should strictly control the operation specification in the packaging, and improve the production process of dehairing and precooling process.