Botulinum toxin is the most poisonous substance known to man. Even a small amount is lethal. Bacteria in the Clostridium genus produce it. A number of countries that support terrorism are developing or have the toxin as a germ-warfare weapon. As a weapon, the toxin might be released in the air or placed in the food supply. The toxin causes the disease botulism.

In tiny doses, the toxin is injected as a treatment for medical conditions, such as eyelid muscle spasms and migraine headaches.

Botulinum toxin poses a great threat. It is easy to produce and transport. Only one gram of the toxin evenly released and inhaled could kill one million people. However, it is hard to keep stable for release in the air.

Some experts believe it would not work in stopping a military enemy. US troops receive a botulinum toxoid vaccine to prevent the disease if exposed to the toxin. However, release of the toxin in a civilian population would present serious results.

Botulinum toxin is colorless and odorless. The toxin cannot be passed from one person to another.

Inhaled Toxin Pathway in Body
Spores in lungs
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