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Ants of medical importance
Ants are capable of biting, stinging and spraying irritant chemicals. Most have only a mild effect on humans; however, a few can cause injury or sometimes even death. Like wasps, individual ants are capable of stinging multiple times.〔O'Rourke, Fergus J. (1956) The medical and veterinary importance of the formicidae. nsectes Sociaux 3(1):107-118 〕
==Fire ants==
The fire ant ''Solenopsis invicta'' is a species that is expanding in range around the world and is most often involved in medical emergencies. The species is aggressive and has a painful sting. A person typically encounters fire ants by inadvertently stepping into one of their mounds, which causes the ants to swarm up the person's legs, attacking ''en masse''. The ants respond to pheromones that are released by the first ant to attack. The ants then swarm and immediately sting when any movement is sensed. People who are sensitive to the venom can die of anaphylaxis. In a survey of 29,300 physicians in the United States of America (in 1989), reports of 83 fatalities were obtained.〔Rhoades RB, Stafford CT, James FK Jr. (1989) Survey of fatal anaphylactic reactions to imported fire ant stings. Report of the Fire Ant Subcommittee of the American Academy of Allergy and Immunology. J Allergy Clin Immunol. 84(2):159-62. PMID 2760357〕 Some fire ant attacks on humans confined to beds have also been noted; in some locations, fire ants can be a particular threat in medical facilities since they can have nesting colonies inside human habitations.〔deShazo RD, Kemp SF, deShazo MD, Goddard J. (2004) Fire ant attacks on patients in nursing homes: an increasing problem. Am J Med. 116(12):843-6. PMID 15178500〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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