Leftover Rice and Pasta Can Cause Serious Illness, Experts Warn

Consuming leftover rice and pasta can lead to severe illness, according to food safety experts. While many people are cautious about raw chicken and unrefrigerated mayonnaise to prevent food poisoning, a significant danger lurks in cooked grains and pasta left at room temperature. The risk is associated with Bacillus cereus, a bacterium that can proliferate in cooked food left out for extended periods. This bacterium produces toxins that are not destroyed by reheating, making the food unsafe to eat. Bacillus cereus is commonly found in soil and can contaminate raw ingredients. When cooked rice or pasta is left at room temperature for too long, these bacteria can multiply and produce heat-stable toxins. Even if the food is thoroughly reheated, these toxins can remain, leading to symptoms such as vomiting and diarrhea. To mitigate this risk, it is crucial to cool cooked rice and pasta rapidly and refrigerate them promptly. Food should ideally be consumed within one day of cooking if it has been stored at room temperature. Prompt refrigeration and reheating within 24 hours are key to minimizing the potential for bacterial growth and toxin production.