- McDonald’s says supplier Taylor Farms is source of onions linked to E. coli outbreakNBC News
- Onions Recalled in Deadly E.Coli Outbreaks Linked to McDonald’s Quarter PoundersThe New York Times
- What McDonald’s needs to do next after E. coli outbreakCNBC
- E. coli Outbreak Linked to McDonald’s Quarter PoundersCDC
- Uh, Should You Worry About McDonald’s Because of the Whole E. Coli Thing?Slate