Severe dehydration may be the result, followed by low blood pressure. Ingestion: If someone swallows a significant amount of ricin, he or she would likely develop vomiting and diarrhea that may become bloody.In cases of known exposure to ricin, people having respiratory symptoms should seek medical care. Finally, low blood pressure and respiratory failure may occur, leading to death. Excess fluid in the lungs would be diagnosed by x-ray or by listening to the chest with a stethoscope.
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This would make breathing even more difficult, and the skin might turn blue. Heavy sweating may follow as well as fluid building up in the lungs (pulmonary edema).
Inhalation: Within a few hours of inhaling significant amounts of ricin, the likely symptoms would be respiratory distress (difficulty breathing), fever, cough, nausea, and tightness in the chest. Following ingestion of ricin, initial symptoms typically occur in less than 10 hours. Initial symptoms of ricin poisoning by inhalation may occur as early as 4- 8 hours and as late as 24 hours after exposure. The major symptoms of ricin poisoning depend on the route of exposure and the dose received, though many organs may be affected in severe cases. Effects of ricin poisoning depend on whether ricin was inhaled, ingested, or injected. Eventually this is harmful to the whole body, and death may occur. Ricin works by getting inside the cells of a person’s body and preventing the cells from making the proteins they need. However, if you come into contact with someone who has ricin on their body or clothes, you could become exposed to it. Ricin-associated illness cannot be spread from person to person through casual contact. In some reports ricin has possibly been used as a warfare agent in the 1980s in Iraq and more recently by terrorist organizations. military experimented with using ricin as a possible warfare agent. The umbrella had been rigged to inject a poison ricin pellet under Markov’s skin. 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. If made into a partially purified material or refined into a terrorist or warfare agent, ricin could be used to expose people through the air, food, or water. Unintentional exposure to ricin is highly unlikely, except through the ingestion of castor beans. It would take a deliberate act to make ricin and use it to poison people. 
Ricin has been used experimentally in medicine to kill cancer cells.Ricin is part of the waste “mash” produced when castor oil is made. Castor beans are processed throughout the world to make castor oil.It is a stable substance under normal conditions, but can be inactivated by heat above 80 degrees centigrade (176 degrees Fahrenheit).It can be in the form of a powder, a mist, or a pellet, or it can be dissolved in water or weak acid.Ricin can be made from the waste material left over from processing castor beans. If castor beans are chewed and swallowed, the released ricin can cause injury. Ricin is a poison found naturally in castor beans.FBI Response to Reports of Suspicious Letters Received at Mail Facilities external icon.
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