Chipotle Shutters 40 Restaurants After Allegedly Feeding People E. Coli-Laced BurritosMelissa Cronin11/01/15 2:44pm1879EditPromoteDismissUndismissHideGo to permalinkChipotle’s signature Halloween “Boorito” came with an extra-scary addition this holiday season: pathogenic strains of E. coli, a bacterium that can be fatal in some cases.