人粒细胞无形体病是由嗜吞噬细胞无形体侵染人末梢血中性粒细胞引起,以发热伴白细胞、血小板减少和多脏器功能损害为主要临床表现的蜱传染病。1994年美国首次报道[1,2],2006年美国报道的无形体病病例数为600多例[3]。近年来我国的安徽、河南、江苏和湖北也相继发现此类病例。我 Human granulocytic anaplasmosis is a tick-borne infectious disease caused by phagocytosis of phagocytes by human peripheral blood neutrophils, with febrile neutropenia, thrombocytopenia and multiple organ dysfunction as the main clinical manifestations. The first report of the United States in 1994 [1, 2] reported more than 600 cases of the Aphasia in the United States in 2006 [3]. In recent years, China’s Anhui, Henan, Jiangsu and Hubei have also found such cases. I