DIAGNOSIS MANAGEMENT OF EMERGING TICK-BORNE PATHOGENS: EHRLICHIOSIS/ANAPLASMOSIS

摘要

Ehrlichia species are a group of tick-transmitted, intracellular, gram-negative bacteria in the family Rickettsiaceae. The organisms that cause the diseases currently known as canine ehrlichioses are in three genera: Ehrlichia, Anaplasma and Neorickettsia. These organisms may reside in one or more host blood cell types including granulocytes, monocytes and platelets. However, each species has a fairly strong predilection for a specific cell type, thus categorizing most infections as either granulocytic or monocytic ehrlichiosis. In addition, one known species infects platelets (Anaplasmsa platys) and one species has a predilection for the endothelial cells of ruminant species (E. ruminantium).