Question: Which food ingredient has been implicated in recent outbreaks of shiga-toxin producing E coli infections?
Answer: A recent report, cited below, identified raw flour as the probable source for an outbreak of STEC infections in 56 cases in 24 states. (Crowe SJ et al. Shiga toxin-producing E. coli infections associated with flour. 2017 NEJM 377(21):2036-2043).