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contentuptodate· Content· item f1_27_1459

©2013 UpToDate ® Print Email Morulae of anaplasmosis in circulating neutrophils A 51-year-old man with no significant past medical history presented with a five-day history of fever, malaise, and diffuse myalgias with no recollection of a tick bite. He was found to have thrombocytopenia, elevated transaminase levels, and renal insufficiency. Examination of the peripheral smear suggested the diagnosis of anaplasmosis. He was started on a course of doxycycline with eventual complete resolution of symptoms. The peripheral smear (1000x, "feather edge") shows morulae of anaplasmosis in the patient's granulocytes. Photomicrographs B and C were taken from the extreme feather edge, and show exploded neutrophils containing well-delineated morulae. Peripheral smear and patient information kindly provided by Dr. Eddy J Chen and Dr. German Pihan, Departments of Medicine and Pathology, Beth Israel Deaconess Medical Center, Boston, MA.