why does food poisoning sometimes last hours and sometimes days?

Question

Surely, once the food that poisoned you, has been expelled, it should end?

In: 1

Answer 1

Food poisoning is a broad term for many different things. In some cases it’s caused by actual bacterial infection, in other cases it’s caused by toxins produced by bacteria and left in the food. So depending on the type of toxin or the type of bacteria, the speed of onset, type of symptoms, and duration will be different.