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Fungal Population Dynamics in ready-to-eat Salads During a Shelf-life in Italy

Journal of Agricultural Science and Technology(A) 2012年第4期2卷 569-576页

作者： Ugo De Corato ENEA Energy Efficiency Technical Unit Agriculture Service CCEI Bari Via Roberto Da Bari 119 Bari 70122 Italy

The aim of this work was to investigate the fungal population dynamics in ready-to-eat bagged samples of rocket （Diplotaxis spp.）, lettuce baby leaf （Lactuca sativa L.） and ＂songino＂（Valerianella olitoria L.） during a shelf-life, in order to evaluate the effects of the storage length and season of production on the spoilage processes. The incidence of toxigenic moulds was particularity studied in order to evaluate a potential production of mycotoxins and allergenic conidia. A total of 900 samples collected from 10 Italian trademarks were analyzed at the 2nd, 5th and 8th day after the packaging in the spring and summer. A very high number of fungi was found and a great variability of moulds and yeasts at the 1 st day of sampling was observed. Regarding to season of production, any seasonal effect on the moulds and yeasts has been observed, but the moulds detected belonged to different species in relation to season. Regarding to storage length, the yeasts and moulds did not showed significant variations during a shelf-life. In relation to vegetable species, the lettuce resulted always less contaminated with respect to other salads, and the rocket presented 1-2 Log cfu/g of increasing in the level of moulds. Regarding to fungi species, the yeasts were significantly predominant respect to moulds. Finally, the toxigenic moulds Aspergillusflavus and Penicillium italicum were found in all the types of salad in the summer, and their growth during the storage at low temperature represented a potential hazard for the mycotoxins and allergenic conidia production in these commodities.

关键词： Fungal population dynamic ready-to-eat vegetable shelf-life toxigenic mould yeast.

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

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Food Quality and Safety 2024年第2期8卷 268-277页

作者： Yang Qu ShenghaoYu Haotian Gu WenWang WenboWang Zhaoying He Hong Shan Min Gao Xin Zhao ChaoWei TingtingTao Guanghua Zhao Changyan Zhou Yujuan Suo Laboratory of Quality and Safety Risk Assessment for Agro-Products of Ministry of Agriculture and Rural Affairs Institute for Agro-Food Standards and Testing TechnologyShanghai Academy of Agricultural SciencesShanghaiChina Information Application Research Center of Shanghai Municipal Administration for Market Regulation ShanghaiChina Eco-environmental Protection Research Institute Shanghai Academy of Agricultural SciencesShanghaiChina MOA Laboratory of Quality&Safety Risk Assessment for Agro-products(Hangzhou) Institute of Agro-Product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina Laboratory of Quality and Safety Risk Assessment for Agro-Products of Ministry of Agriculture and Rural Affairs Institute of Agricultural Standards and Testing Technology for Agri-ProductsShandong Academy of Agricultural SciencesJinanChina Institute of Quality Standard and Testing Technology Beijing Academy of Agriculture and Forestry SciencesBeijingChina Quality and Safety Institute of Agricultural Products Heilongjiang Academy of Agricultural SciencesHarbinChina Institute of Food Science and Technology Chinese Academy of Agricultural SciencesBeijingChina Institute of Germplasm Resources and Biotechnology Tianjin Academy of Agricultural SciencesTianjinChina Laboratory of Quality and Safety Risk Assessment for Agro-Products of Ministry of Agriculture and Rural Affairs Institute of Quality Standard and Testing Technology for Agro-Products of Sichuan Academy of Agricultural SciencesChengduChina Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality Institute of Food Safety and NutritionJiangsu Academy of Agricultural SciencesNanjingChina Research Institute of Agricultural Quality Standards and Testing Techniques Henan Academy and Agricultural SciencesZhengzhouChina

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