In one of the many disturbing images in a new Netflix documentary on food safety, animal waste from a cattle feedlot ends up in a drainage canal providing water to large fields of romaine lettuce.
It’s no wonder leafy greens are a chronic source of E. coli infections, Northeastern professor and food safety expert Darin Detwiler says in “Poisoned: The Dirty Truth About Your Food.”
Unlike with meat for cooking, “there’s no kill step” in preparing lettuce, Detwiler says in the 1 hour, 22-minute documentary airing Aug. 2.

Detwiler, a full-time associate teaching professor, says he hopes the documentary—whose trailer already has more than 1.6 million views—serves as a consumer call to food safety action on the part…