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LAS VEGAS (Feb. 29) -- Police say a man is in critical condition after the deadly toxin ricin was found in his Las Vegas motel room.
Las Vegas police Lt. Lewis Roberts says the man has been in a coma since he was found in his room at the Extended Stay America Motel on Thursday.
What ricin is
* Ricin is a poison that can be made from the waste left over from processing castor beans.
* It can be in the form of a powder, a mist, or a pellet, or it can be dissolved in water or weak acid.
* It is a stable substance. For example, it is not affected much by extreme conditions such as very hot or very cold temperatures.
Where ricin is found and how it is used
* Castor beans are processed throughout the world to make castor oil. Ricin is part of the waste “mash” produced when castor oil is made.
* Ricin has some potential medical uses, such as bone marrow transplants and cancer treatment (to kill cancer cells).
How you could be exposed to ricin
* It would take a deliberate act to make ricin and use it to poison people. Accidental exposure to ricin is highly unlikely.
* People can breathe in ricin mist or powder and be poisoned.
* Ricin can also get into water or food and then be swallowed.
* Pellets of ricin, or ricin dissolved in a liquid, can be injected into people’s bodies.
* Depending on the route of exposure (such as injection or inhalation), as little as 500 micrograms of ricin could be enough to kill an adult. A 500-microgram dose of ricin would be about the size of the head of a pin. A greater amount would likely be needed to kill people if the ricin were swallowed.
* In 1978, Georgi Markov, a Bulgarian writer and journalist who was living in London, died after he was attacked by a man with an umbrella. The umbrella had been rigged to inject a poison ricin pellet under Markov’s skin.
* Some reports have indicated that ricin may have been used in the Iran-Iraq war during the 1980s and that quantities of ricin were found in Al Qaeda caves in Afghanistan.
* Ricin poisoning is not contagious. It cannot be spread from person to person through casual contact.