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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Epidemiology of bed bugs ： ウィキペディア英語版 Epidemiology of bed bugs Bed bugs occur around the world. Rates of infestations in developed countries while decreasing from the 1930s to the 1980s have increased dramatically since the 1980s.〔 Previous to this they were common in the developing world but rare in the developed world.〔 The increase in the developed world may have been caused by increased international travel, resistance to insecticides, and the use of new pest-control methods that do not affect bed bugs. The fall in bed bug populations after the 1930s in the developed world is believed to be partly due to the usage of DDT to kill cockroaches,〔 which are a natural predator of the bed bug. The invention of the vacuum cleaner and simplification of furniture design may have also played a role.〔 Others believe it might simply be the cyclical nature of the organism. ==Developed world== Bed bugs are increasing in Europe, USA, Canada and Australia. The infestations have been occurring in a wide range of facilities in the developed world in recent years including: hotels (from backpacker to five star), overnight trains, private homes, cruise ships, schools, hospitals and homeless shelters.〔 These infestations are occasionally of both types of bed bugs (common and tropical).〔 The increased rates of infestations have been matched by increased media coverage. Pest management companies have also seen a many fold increase in calls regarding bed bugs during the 2000s. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Epidemiology of bed bugs」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.