Gather and cross-reference information from as many sources as possible, because many sources will not contain all the information needed. Your best policy is to be able to look at a plant and identify it with absolute certainty and to know its uses or dangers. Many times this is not possible. Mushroom identification is very difficult and must be precise, even more so than with other plants. Some mushrooms cause death very quickly.
Some mushrooms have no known antidote.
Two general types of mushroom poisoning are gastrointestinal and central nervous system. Contact with or touching plants unnecessarily. The effects may be persistent, spread by scratching, and are particularly dangerous if there is contact in or around the eyes. The principal toxin of these plants is usually an oil that gets on the skin upon contact with the plant. The oil can also get on equipment and then infect whoever touches the equipment.