Science Education Science articles that you can understand Botulism Toxin: Friend of Foe? Posted by Tracey Ogrin , 7/31/02 at 12:35:36 AM. In 2001, an outbreak of a foodborne illness affected the lives of 14 people living in Alaska. Within 24 hours after eating fermented beaver tail, the people of the village experienced dry mouth, blurred vision, nausea and fatigue. Respiratory failure almost took the lives of 2 of these people, who were luckily saved by intubation and mechanical ventilation. The cause of this foodborne illness was due to botulism toxin (Botulism Outbreak, 2001). This same toxin that almost killed two people was actually a "lifesaver" to a 52-year-old woman. For over half of her life, she has experienced chronic migraines. Due to the botulism toxin, the migraines have miraculously disappeared (Gupta, 2002). How can this be possible? The same exact toxin that almost killed two people significantly enhanced another person's life. Botulism toxin is derived from the bacteria, Clostridium botulinum. Even though botulism toxin produces many negative side effects in humans, including death, it has the potential to produce positive side effects when the toxin is in dilute concentration and administered medically. By understanding the functions, strains, and types of this toxin, humans can protect themselves against the harmful effects, and at the same time, take advantage of the positive effects. Botulism toxin inhibits acetlycholine release at the synapses of motor nerves. The inhibition of this neurotransmitter prevents muscles from contracting, thus causing a flaccid paralysis. The toxin first affects the cranial nerves and then it moves on to affect the skeletal muscles (American Heart Association, 2000). Respiratory failure and death can result because the toxin inhibits the diaphragm and chest muscles. On the contrary, in dilute concentrations, this same toxin that inhibits contraction of skeletal muscles, can actually be advantageous to people who suffer from migraines, muscle spasms, and an overactive bladder. | |
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