An ehrlichiosis that results in infection located in monocyte or located in macrophage, has_material_basis_in Ehrlichia chaffeensis, which is transmitted by black-legged tick (Ixodes scapularis), transmitted by western black-legged tick (Ixodes pacificus) or transmitted by castor bean tick (Ixodes ricinus). The infection has symptom headache, has symptom muscle aches, has symptom fatigue, has symptom fever and has symptom rash.