Figure. . . Histopathology slides from 36-year-old woman with human granulocytic anaplasmosis, Slovenia, 2010. Peripheral blood smear (A, B); bone marrow smear (C). Modified Giemsa staining, original magnification ×1,000. Morulae (clusters of Anaplasma phagocytophilum in granulocytic leukocytes) are indicated by arrows. In Europe, morulae have been reported in only 1 patient (6), but they are a relatively common observation in the United States, associated predominately with severe cases of human granulocytic anaplasmosis (7).