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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 Enteroaggregative Escherichia coli ： ウィキペディア英語版 Enteroaggregative Escherichia coli Enteroaggregative Escherichia coli (often referred to as EAEC) is a pathotype of Escherichia coli often associated with diarrhoeal illness. The defining characteristic of EAEC compared to other pathotypes of ''E. coli'' is a "stacked brick" pattern of adhesion to the human epithelial cell line HEp-2. The pathogenesis of EAEC involves the bacteria aggregating and colonizing the intestinal mucosa, releasing enterotoxins and cytotoxins that damage host cells and inducing inflammation - resulting in diarrhoea and other gastrointestinal symptoms. EAEC is being increasingly recognised as an emerging enteric pathogen. In particular, EAEC is a common bacterial cause of paediatric diarrhoea, especially in developing countries. It has also been associated with traveller's diarrhoea and infections in HIV-infected individuals, as well as a cause of sporadic food-poisoning outbreaks in the developed world.〔Huang, D. B., et al. (2006). "A review of an emerging enteric pathogen: enteroaggregative Escherichia coli." Journal of Medical Microbiology 55(10): 1303-1311.〕 Awareness of EAEC was increased by a serious outbreak in Germany during 2011, causing over 4000 cases and at least 50 fatalities. The pathogen responsible was found to be an EAEC O104:H4 strain which had acquired a Shiga toxin (usually associated with Verotoxin-producing Escherichia coli).〔Nadia Boisen, Angela R. Melton-Celsa, Flemming Scheutz, Alison D. O'Brien & James P. Nataro (2015): Shiga toxin 2a and Enteroaggregative Escherichia coli - a deadly combination, Gut Microbes, DOI: 10.1080/19490976.2015.1054591.〕 Strains of EAEC are highly genetically heterogeneous, but some genes have been associated with virulence. A transcription factor named AggR, part of the AraC family of transcription activators, may regulate some of the virulence factors for EAEC. Several toxins have been linked to EAEC virulence, including ShET1 (Shigella enterotoxin 1), Pet (plasmid‐encoded toxin), and EAST-1. Other virulence factors include adhesins, with a family of bundle‐forming fimbriae termed aggregative adherence fimbria (AAF) found to be important in many EAEC strains.〔Harrington, S.M., E.G. Dudley, and J.P. Nataro, Pathogenesis of enteroaggregative Escherichia coli infection. FEMS Microbiol Lett, 2006. 254(1): p. 12-8.〕 ==References== 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「Enteroaggregative Escherichia coli」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.