Human granulocytic anaplasmosis is an acute febrile tick-borne illness caused by the bacterium Anaplasma phagocytophilum. An anaplasmosis-related fatality in a Vermont resident with multiple comorbidities is described. Clinicians should be aware of the risk factors for severe outcomes of this emerging disease and promptly treat when suspected.
Keywords: Anaplasma phagocytophilum; Ixodes scapularis; Vermont; anaplasmosis; tick-borne disease.