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Ehrlichiosis ewingii infection is an infectious disease caused by an intracellular bacteria, ''Ehrlichia ewingii''. The infection is transmitted to humans by the tick, ''Amblyomma americanum''. This tick can also transmit ''Ehrlichia chaffeensis'', the bacteria that causes Human monocytic ehrlichiosis (HME). ==Mechanism of Illness== Humans contract the disease after a bite by an infected tick of the species ''Amblyomma americanum''. Those with an underlying immunodeficiency (such as HIV) appear to be at greater risk of contracting the disease. Compared to HME, ewingii ehrlichiosis has a decreased incidence of complications.〔 〕 Like Anaplasma phagocytophilum, the causative agent of human granulocytic ehrlichiosis, Ehrlichia ewingii infects neutrophils. Infection with ''E. ewingii'' may delay neutrophil apoptosis. 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「Ehrlichiosis ewingii infection」の詳細全文を読む スポンサード リンク
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