Rice and food poisoning: what should you know?

Uncooked rice may contain spores that survive cooking. If cooked rice cools slowly or stays at room temperature, the spores can grow into bacteria and produce toxins. Reheating may not remove every toxin. Symptoms can include nausea, vomiting, watery diarrhoea, abdominal cramps, and fever. See the guide to Food Poisoning for the wider pattern of foodborne illness.

Sip oral rehydration solution regularly, especially after loose stools or vomiting; Oral Rehydration Therapy replaces water and salts more effectively than plain water alone. Rest and eat small, plain meals when you feel able. Do not taste food to decide whether it is safe. Refrigerate leftover rice promptly in a shallow container, use it soon, and reheat it until steaming once. Avoid preparing food for others while you have vomiting or diarrhoea.

Seek urgent medical help if you cannot keep fluids down, become confused or unusually drowsy, pass very little urine, or feel faint when standing. Contact a clinician for blood in stool, severe or worsening abdominal pain, persistent fever, or symptoms that are not settling. IV Fluid Therapy may be needed when dehydration is significant or drinking is not possible.

Ask whether your symptoms fit food poisoning, how much fluid to take, and which warning signs should prompt a return visit. Mention when the rice was cooked, how it was stored, and whether anyone else who ate it became ill.