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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 Borrelia burgdorferi ： ウィキペディア英語版 Borrelia burgdorferi (詳細はbacterial species of the spirochete class of the genus ''Borrelia''. ''B. burgdorferi'' exists in North America and Europe and is the predominant causative agent of Lyme disease. ''Borrelia'' species are considered diderm (double-membrane) bacteria rather than gram positive or negative. == Infection == As a tick-transmitted bacteria, Borrelia burgdorferi must first infect a non-human host reservoir, such as a deer or mice.〔 This host reservoir must be a vertebrate that is able to maintain and to grow the pathogen within its blood.〔 The tick, Ixodes, then, must acquire the pathogen through blood feeding and maintain the pathogen, until it can pass it off onto another host reservoir or to a human.〔 The process of infection involves an adult tick re-injecting the host's blood back into its system, transmitting the disease along with it. This is also known as coxal fluid. In order for a successful infection, the vertebrate host reservoir must cultivate enough bacteria that can be circulated throughout the blood, so that B. burgodorferi can be transmitted through Ixodes blood feeding.〔 Additionally, the bacteria itself must withstand the molting and life cycle of the Ixodes tick and successfully transinfect a host for B. Burgdorferi to spread to humans.〔 Anaplasmosis and babesiosis are also common tick borne pathogens that infect humans similarly to Borrelia burgdorferi. Consequently, it is possible for an Ixodes tick to coinfect a host with either two or all other diseases. When a host is coinfected, the combined effects of the diseases act synergistically, often proving to cause worse symptoms than a single infection alone〔 Coinfected humans tend to present with a more severe manifestation of Lyme disease. In addition, they tend to acquire a wider arrange of secondary symptoms, such as influenza-like symptoms.〔 More studies and research must be done to determine the synergistic effect of co-infection and its effect on the human body. 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「Borrelia burgdorferi」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.