Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Botulism ?
    ### Response:
    Botulism is a rare but serious illness. The cause is a toxin (poison) made by a bacterium called Clostridium botulinum. It occurs naturally in soil.     There are several kinds of botulism. Foodborne botulism comes from eating foods contaminated with the toxin.
    