Shiga toxin-producing Escherichia coli (STEC) outbreaks in 2018 and 2019 linked to leafy greens have raised many questions regarding recurring STEC outbreaks. Until 2018 when the U.S. Food and Drug Administration (FDA) and the Centers of Disease Control and Prevention (CDC) presented their analysis of eight years-worth of data to industry, it was largely unknown that seasonality seemed to be playing a role in STEC outbreaks associated with leafy greens. When and how have transition periods between growing leafy green regions become periods of vulnerability to STEC contamination?

Sonia Salas