Human Granulocytic Anaplasmosis Affecting the Myocardium


  • Authors do not have commercial or other associations that might pose a conflict of interest (e.g., pharmaceutical stock ownership, consultancy).

  • This work was done at Mercy Hospital, Allina Hospital and Clinics, Coon Rapids, Minn.

Address correspondence and requests for reprints to Malik: 1988 Brewster Street, Apartment 104, St. Paul, MN 55108 (e-mail:


A case of 65-year-old male is reported who presented with myalgias, headache, and fever. He subsequently developed myocarditis and was diagnosed to have anaplasmosis on peripheral blood smear. He was treated with doxycycline for 30 days. A coronary angiogram done after recovery showed normal epicardial arteries. The case illustrates the importance of a careful examination of the peripheral smear, with a high index of clinical suspicion, which led to prompt treatment and complete recovery of the patient.