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人埃立克体病是新发现的由蜱传播的一类自然疫源性疾病 ,其病原体是革兰阴性严格的细胞内寄生菌 ,属立克次体科 (Ｒｉｃｋｅｔｔｓｉａｃｅａｅ)埃里希体族 (Ｅｈｒｌｉｃｈｉａｅ)。近年来 ,在美国新发现了 3种引起人类疾病的埃立克体 :查菲埃立克体(Ｅ .ｃｈａｆｆｅｅｍｓｉ
Ehrlichii disease is a newly discovered tick-borne natural foci of disease of which the pathogen is a strictly gram-negative intracellular parasite belonging to the Ehrlichia (Rickettsiaceae) Ehrlichiae). In recent years, three new Ehrlichia species causing human diseases have been discovered in the United States: Echaffeemsi