Kim Young-Ji, Kim Hong-Seok, Kim Kwang-Yeop, Chon Jung-Whan, Kim Dong-Hyeon, Seo Kun-Ho
Center for One Health, College of Veterinary Medicine, Konkuk University , Seoul, South Korea .
Foodborne Pathog Dis. 2016 Dec;13(12):656-660. doi: 10.1089/fpd.2016.2163.
Organic foods have risen in popularity recently. However, the increased risk of bacterial contamination of organic foods has not been fully evaluated. In this study, 100 samples each of organic and conventional fresh vegetables (55 lettuce samples and 45 sprout samples) sold in South Korea were analyzed for aerobic bacteria, coliforms, Escherichia coli, and Bacillus cereus. Although the aerobic bacteria and coliform counts were not significantly different between the two farming types (p > 0.05), the occurrence rate of B. cereus was higher in organically cultivated vegetables compared with those grown conventionally (70% vs. 30%, respectively). The mean contamination level of B. cereus-positive organic samples was also significantly higher (1.86 log colony-forming unit [CFU]/g vs. 0.69 log CFU/g, respectively) (p < 0.05). In addition, six samples of organic vegetables were found to be contaminated with B. cereus at over 4 log CFU/g categorized as unsatisfactory according to Health Protection Agency guideline. The relatively higher occurrence rate of B. cereus in organic vegetables emphasizes the importance of implementing control measures in organic vegetable production and postharvest processing to reduce the risk of food poisoning.
有机食品近来越来越受欢迎。然而，有机食品细菌污染风险增加的情况尚未得到充分评估。在本研究中，对韩国销售的100份有机和传统新鲜蔬菜样本（55份生菜样本和45份豆芽样本）进行了需氧菌、大肠菌群、大肠杆菌和蜡样芽孢杆菌分析。虽然两种种植类型的需氧菌和大肠菌群计数无显著差异（p>0.05），但与传统种植蔬菜相比，有机种植蔬菜中蜡样芽孢杆菌的发生率更高（分别为70%和30%）。蜡样芽孢杆菌阳性有机样本的平均污染水平也显著更高（分别为1.86 log菌落形成单位[CFU]/克和0.69 log CFU/克）（p<0.05）。此外，根据卫生防护局指南，发现6份有机蔬菜样本被蜡样芽孢杆菌污染，含量超过4 log CFU/克，属于不合格。有机蔬菜中蜡样芽孢杆菌相对较高的发生率强调了在有机蔬菜生产和收获后加工中实施控制措施以降低食物中毒风险的重要性。
