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Risk assessment of Bacillus cereus in lettuce grown in open-field and greenhouse farming systems in China: A comparative study

引用

FOOD QUALITY AND SAFETY 2024年第8期8卷 268-277页

作者： Qu, Yang Yu, Shenghao Gu, Haotian Wang, Wen Wang, Wenbo He, Zhaoying Shan, Hong Gao, Min Zhao, Xin Wei, Chao Tao, Tingting Zhao, Guanghua Zhou, Changyan Suo, Yujuan shanghai Acad Agr Sci Inst Agrofood Stand & Testing Technol Lab Qual & Safety Risk Assessment Agroprod Minist Agr & Rural Affairs Shanghai Peoples R China shanghai municipal adm market regulat Informat Applicat Res Ctr Shanghai Peoples R China shanghai Acad Agr Sci Ecoenvironm Protect Res Inst Shanghai Peoples R China Zhejiang Acad Agr Sci Inst Agroprod Safety & Nutr MOA Lab Qual & Safety Risk Assessment Agroprod Han Hangzhou Peoples R China Shandong Acad Agr Sci Inst Agr Stand & Testing Technol Agriprod Lab Qual & Safety Risk Assessment Agroprod Minist Agr & Rural Affairs Jinan Peoples R China Beijing Acad Agr & Forestry Sci Inst Qual Stand & Testing Technol Beijing Peoples R China Heilongjiang Acad Agr Sci Qual & Safety Inst Agr Prod Harbin Peoples R China Chinese Acad Agr Sci Inst Food Sci & Technol Beijing Peoples R China Tianjin Acad Agr Sci Inst Germplasm Resources & Biotechnol Tianjin Peoples R China Sichuan Acad Agr Sci Inst Qual Stand & Testing Technol Agroprod Lab Qual & Safety Risk Assessment Agroprod Minist Agr & Rural Affairs Chengdu Peoples R China Jiangsu Acad Agr Sci Inst Food Safety & Nutr Key Lab Control Technol & Stand Agroprod Safety & Minist Sci & Technol Nanjing Peoples R China Henan Acad & Agr Sci Res Inst Agr Qual Stand & Testing Tech Zhengzhou Peoples R China

Objectives: Bacillus cereus isolates from vegetables can cause diarrheal syndrome food poisoning. Lettuce, the most highly consumed ready-to-eat vegetable, poses a significant risk of B. cereus exposure. Hence, B. cereus monitoring and evaluation during cultivation are essential for preventing foodborne illnesses caused by this food-pathogen combination. However, the impact of different cultivation practices on B. cereus contamination in lettuce currently remains unclear. Furthermore, a validity indicator for the experimental models cannot be effectively validated under field conditions. Materials and Methods: Herein, we assessed the risk of B. cereus exposure using lettuce grown under two different cultivation farming systems in China (open-field versus greenhouse) using a quantitative microbial risk assessment model. Tukey's mean comparison method and kernel density estimation frequency distribution statistics were used for model validation using environmental samples and lettuce. Results: The mean concentration of B. cereus in open-field-grown lettuce was significantly higher than that in greenhouse-grown lettuce (P0.05), verifying the accuracy of the risk model. Conclusion: Soil solarization, complete manure treatment, usage of mulch films, and irrigation water quality should be considered in agricultural practices to control B. cereus concentrations in lettuce. Overall, we found that B. cereus was more abundant in open-field-grown lettuce, and we provide a risk evaluation framework that can guide farmers and policy-makers to control B. cereus contamination in farm-to-fork lettuce chains in China.

关键词： Diarrheal syndrome food poisoning ready-to-eat vegetable greenhouse microbial risk assessment

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