24 sick: WTF is E. coli O121 doing in frozen pizza thingies?

USDA once again buries the important stuff by noting half-way through a press release that 24 people are sick with E. coli O121 from some crap frozen pizza thingies made by Rich Products rich.mini.pizza.slicesCorporation in Buffalo, NY.

A bunch of people are sick with a rare and dangerous form of E. coli. How hard can this be? (you fill in the next line, that’s about what USDA is worth).