Following implementation of Health Canada's Policy on Listeria monocytogenes in Ready-to-Eat Foods by Canadian food safety authorities in 2011, a four-year study (2012–2016) was carried out to gain baseline information on the occurrence of bacterial pathogens, notably the prevalence and levels of Listeria monocytogenes (L. monocytogenes) in various product types of ready-to-eat (RTE) fresh-cut fruits and fresh-cut vegetables sold at retail in Canada. A total of 10,070 pre-packaged samples, including 4691 fresh-cut fruit and 5379 fresh-cut vegetable samples were collected from retail stores across Canada and analyzed for bacterial pathogens and generic Escherichia coli (E. coli). Salmonella species (spp.), E. coli O157, Shigella and Campylobacter were not detected in any of the tested samples. L. monocytogenes was identified in 0.51% (95% CI [0.34, 0.76]) of the fresh-cut fruit and in 0.24% (95% CI [0.14, 0.41]) of the fresh-cut vegetable samples. Of the 37 L. monocytogenes positive samples identified, levels of L. monocytogenes <5 CFU/g, 5–<100 CFU/g, and ≥100 CFU/g were found in 67.6% (25/37), 24.3% (9/37) and 8.1% (3/37) of the samples, respectively. The results of this study indicate that the vast majority of fresh-cut fruits and vegetables sold on the Canadian retail market are safe for consumption. However, contamination by L. monocytogenes can infrequently occur in fresh-cut fruits and vegetables, with certain types of fresh-cut fruits (i.e., melons, apples) and vegetables (i.e., mushrooms, cauliflower) being more likely to be contaminated than others. Safe handling practices are recommended for producers, retailers and consumers including storage at refrigerated temperatures.

在加拿大食品安全局于2011年实施加拿大卫生部关于即食食品中李斯特菌李斯特菌的政策之后，开展了一项为期四年（2012-2016）的研究，以获取有关细菌病原体发生的基线信息，特别是在加拿大零售的即食（RTE）鲜切水果和鲜切蔬菜的各种产品类型中单核细胞增生李斯特菌（L. monocytogenes）的流行和水平。共有10070预包装样品，包括4691鲜切水果和5379鲜切蔬菜样品来自加拿大各地的零售商店收集和细菌病原体和通用分析大肠埃希氏菌（大肠杆菌）。沙门氏菌在所有测试样品中均未检测到大肠杆菌，大肠杆菌O157，志贺氏菌和弯曲杆菌。在鲜切水果的0.51％（95％CI [0.34，0.76]）和鲜切蔬菜样品的0.24％（95％CI [0.14，0.41]）中鉴定出单核细胞增生李斯特菌。在鉴定出的37种单核细胞增生李斯特菌阳性样本中，分别有67.6％（25/37），24.3％（9）发现单核细胞增生李斯特菌水平<5 CFU / g，5– <100 CFU / g和≥100CFU / g。 / 37）和8.1％（3/37）的样本。这项研究的结果表明，在加拿大零售市场上出售的绝大多数鲜切水果和蔬菜都可以安全食用。然而，单核细胞增生李斯特菌污染可很少发生在鲜切水果和蔬菜，与某些类型的鲜切水果（即，瓜类，苹果），蔬菜（即，蘑菇，菜花）更可能比其他污染。建议生产商，零售商和消费者采取安全的操作规范，包括在冷藏温度下存储。