The disease caused by Clostridium botulinum found most commonly in improperly canned foods is botulism. Botulism is a rare, potentially fatal syndrome of diffuse, flaccid paralysis caused by botulinum neurotoxin (BoNT) which is elaborated by the bacterium Clostridium botulinum. The symptoms of botulism usually start with weakness of the muscles that control the eyes, face, mouth, and throat, which may spread to the neck, arms, torso, and legs. Botulism can also weaken the muscles involved in breathing, which can lead to difficulty breathing and even death. The toxins produced by Clostridium botulinum are neurotoxic and affect the nervous system. Foodborne botulism is characterized by descending, flaccid paralysis that can cause respiratory failure. Early symptoms include marked fatigue, weakness, and vertigo, usually followed by blurred vision, dry mouth, and difficulty in swallowing and speaking. Vomiting, diarrhea, constipation, and abdominal swelling may also occur.