2017年广州市越秀区网络外卖餐饮食品微生物污染状况分析

目的 了解广州市越秀区网络外卖餐饮食品的微生物污染状况,为监管工作提供参考。方法 2017年在越秀区采集网络外卖餐饮食品120份,按照GB 4789.2—2016《食品安全国家标准 食品微生物学检验 菌落总数测定》等标准的要求开展菌落总数、大肠埃希菌、金黄色葡萄球菌、沙门菌、蜡样芽胞杆菌和单核细胞增生李斯特菌的检测。结果 本次监测的网络外卖餐饮食品不合格率为39.17%(47/120),不同品种网络外卖餐饮食品间菌落总数和大肠埃希菌的不合格率以及评价等级的分布均差异有统计学意义(P<0.05),与不合格外卖样品比较,合格外卖样品的运送距离更短而中心温度更高,均差异有统计学意义(P<0.05)。Spearman秩相关显示,网络外卖餐饮食品的配送距离与菌落总数呈正相关(P<0.05),而其中心温度与菌落总数、大肠埃希菌均呈负相关(P<0.05)。结论 广州市越秀区网络外卖餐饮食品微生物污染状况不容乐观,本次监测结果提示应加强网络外卖餐饮食品的监管,以防止食源性疾病的发生。

Analysis of microbial contamination of online ordering food in Yuexiu District of Guangzhou

Objective To investigate microbial contamination of online ordering food in Yuexiu District of Guangzhou, and to provide reference for regulatory authorities. Methods Totally 120 online ordering food samples were collected during 2017 in Yuexiu District of Guangzhou. The microbial contamination of the samples, including the total plate count, Escherichia coli, methicillin-resistant Staphylococcus aureus, Salmonella,Bacillus cereus and Listeria monocytogenes were detected. Results The total unqualified rate was 39.17% (47/120), the unqualified rate and the levels of the total plate count and Escherichia coli were different among the 5 kinds of online ordering food(P<0.05). The transportation distance of qualified samples were shorter and the core temperature were higher(P<0.05). Spearman correlation analysis showed that transportation distance was positively correlated (P<0.05) with the total number of bacterial colonies and the core temperature had a negative correlation (P<0.05) with the level of hygiene indicator. Conclusion The sanitation situation of online ordering food in Yuexiu District of Guangzhou was worring, especially for hygiene indicator. It may cause food safety problems and was worthy of attention.