Botulism

Botulism is a rare, potentially fatal illness caused by botulinum neurotoxin, which blocks nerve signaling and can produce descending flaccid paralysis.

Botulinum neurotoxin: A family of bacterial toxins that blocks acetylcholine release at nerve endings and can cause flaccid paralysis. It is the direct cause of botulism’s neuromuscular failure.
Foodborne botulism: Botulism caused by eating food containing botulinum neurotoxin. Improperly preserved foods can allow toxin to form before consumption.
Clostridium botulinum: An anaerobic, spore-forming bacterium that produces botulinum neurotoxins. It is the principal bacterial source of botulism toxin.
Myasthenia gravis: An autoimmune disorder in which antibodies impair communication at neuromuscular junctions. It can cause fatigable weakness, but usually lacks botulism’s descending acute paralysis pattern.
Neuromuscular junction: The synapse where a motor neuron signals a muscle fiber to contract. Botulinum toxin disrupts signaling at this interface.
Infant botulism: Botulism in infants caused by intestinal colonization with toxin-producing bacteria. It differs from foodborne illness because toxin forms inside the infant’s intestine.
Clostridium baratii: A bacterial species that can produce a botulinum neurotoxin associated with human botulism. It is one of the less common bacterial sources of toxin-mediated illness.
Guillain–Barré syndrome: An acute immune-mediated disorder of peripheral nerves that often causes ascending weakness. Its typical ascending course contrasts with botulism’s descending weakness.
Acetylcholine: A neurotransmitter that carries signals across neuromuscular junctions and other synapses. Botulinum toxin prevents its release from motor nerve endings.
Wound botulism: Botulism caused by toxin produced by bacteria growing in a wound. It is a distinct route of toxin production, often associated with contaminated injection wounds.

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