- McDonald’s Stock Drops on E. coli Outbreak Linked to Burgers Barron’s
- E. coli Outbreak Linked to McDonald’s Quarter Pounders CDC
- How McDonald’s can learn from other fast-food giants in recovering from the deadly E. coli outbreak Business Insider
- US deadly E. coli outbreak linked to McDonald’s burgers DW (English)
- Nebraska, Colorado mostly affected in multi-state outbreak of E. coli Nebraska Examiner