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2. Outbreaks attributed to fresh leafy vegetables, United States, 1973–2012
3. Lessons Learned from a Decade of Investigations of Shiga Toxin–Producing Escherichia coli Outbreaks Linked to Leafy Greens, United States and Canada
4. U.S. Food and Drug Administration (FDA). 2021. Factors potentially contributing to the contamination of leafy greens implicated in the fall 2020 outbreak of E. coli O157:H7. https://www.fda.gov/media/147349/download.
5. U.S. Food and Drug Administration (FDA). 2018. FDA investigated multistate outbreak of E. coli O157:H7 infections linked to romaine lettuce from Yuma growing region. https://www.fda.gov/food/outbreaks-foodborne-illness/fda-investigated-multistate-outbreak-e-coli-o157h7-infections-linked-romaine-lettuce-yuma-growing. Accessed 24 October.