U.S. Food and Drug Administration
Center for Food Safety and Applied Nutrition
NCBI/NLM/NIH Glossary
botulinum toxins
Toxins produced by Clostridium botulinum. There are at least seven different substances, most being proteins. They have neuro-, entero-, and hemotoxic properties, are immunogenic, and include the most potent poisons known. The most commonly used apparently blocks release of acetylcholine at cholinergic synapses