Borrelia miyamotoi in Human-Biting Ticks, United States, 2013–2019

Abstract

During 2013–2019, Borrelia miyamotoi infection was detected in 19 US states. Infection rate was 0.5%–3.2%; of B. miyamotoi–positive ticks, 59.09% had concurrent infections. B. miyamotoi is homogeneous with 1 genotype from Ixodes scapularis ticks in northeastern and midwestern states and 1 from I. pacificus in western states.

Keywords

• Borrelia miyamotoi
• Ixodes scapularis
• Ixodes pacificus
• ticks
• bacteria
• spirochetes