Background: The first recognized cases of Borrelia miyamotoi disease (BMD) in North America were reported in the northeastern United States in 2013.
Objective: To further describe the clinical spectrum and laboratory findings for BMD.
Design: Case series.
Setting: Patients presenting to primary care offices, emergency departments, or urgent care clinics in 2013 and 2014.
Participants: Acutely febrile patients from the northeastern United States in whom the treating health care providers suspected and ordered testing for tick-transmitted infections.