Prevention of a shigella infection includes:
Wash your hands after using the toilet.
Avoid eating raw clams or oysters.
Do not drink unpasteurized milk.
Do not share food utensils.
Wash vegetables and fruits thoroughly.
Wash your hands after handling raw meat, seafood, or poultry.
Make sure all meat, poultry and fish products are well cooked.
Re-heat leftover foods thoroughly.