Possible peanut butter-related ailments?

Patient: Okay, a bit of a scenario: You find a jar of Skippy chunky peanut butter in your pantry cos you’re hungry, and when you go to pop open the top, the lid is twisted on, but not tightly. The lid will stay on, but it is just loose. What are the possible ailments that could befall eating peanut butter in this condition?

Doctor: