Culliney Paul, Schmalenberger Achim
Department of Biological Sciences, University of Limerick, V94T9PX Limerick, Ireland.
Foods. 2020 Sep 1;9(9):1211. doi: 10.3390/foods9091211.
Minimally processed ready-to-eat (RTE) vegetables are increasingly consumed for their health benefits. However, they also pose a risk of being ingested with food-borne pathogens. The present study investigated the ability of RTE spinach and rocket to support the growth of as previous studies provided contradicting evidence. Findings were compared to growth on iceberg lettuce that has repeatedly been shown to support growth. Products were inoculated with a three-strain mix of at 10 and 100 cfu g and stored in modified atmosphere (4 kPa O, 8 kPa CO) at 8 °C over 7-9 days. Spinach demonstrated the highest growth potential rate of 2 to 3 log cfu g over a 9-day period with only marginal deterioration in its visual appearance. Growth potential on rocket was around 2 log cfu g over 9 days with considerable deterioration in visual appearance. Growth potential of iceberg lettuce was similar to that of rocket over a 7-day period. Growth curves fitted closely to a linear growth model, indicating none to limited restrictions of growth over the duration of storage. The high growth potentials of on spinach alongside the limited visual deterioration highlight the potential risks of consuming this raw RTE food product when contaminated.
由于其对健康有益，最少加工即食（RTE）蔬菜的消费量日益增加。然而，它们也存在被食源性病原体污染的风险。本研究调查了即食菠菜和芝麻菜支持[具体病原体名称未给出]生长的能力，因为之前的研究提供了相互矛盾的证据。将研究结果与反复证明能支持[具体病原体名称未给出]生长的卷心莴苣上的生长情况进行比较。产品接种了10和100 cfu/g的三菌株混合[具体病原体名称未给出]，并在8℃的气调环境（4 kPa氧气，8 kPa二氧化碳）中储存7 - 9天。菠菜在9天内显示出最高的生长潜力率，达到2至3 log cfu/g，其外观仅略有变差。芝麻菜在9天内的生长潜力约为2 log cfu/g，外观有相当大的变差。卷心莴苣在7天内的生长潜力与芝麻菜相似。生长曲线与线性生长模型拟合紧密，表明在储存期间生长没有到有限的限制。[具体病原体名称未给出]在菠菜上的高生长潜力以及有限的外观变差突出了食用这种受污染的即食生鲜食品的潜在风险。
