Ehrlichia

**Definition:** Small, often pleomorphic, coccoid to ellipsoidal organisms occurring intracytoplasmically in circulating LYMPHOCYTES. They are the etiologic agents of tick-borne diseases of humans; DOGS; CATTLE; SHEEP; GOATS; and HORSES.

**Tree numbers:** - B03.440.664.750.287 - B03.660.050.783.500.287

**Synonyms:** - Cowdria