Babesia microti Infection, Eastern Pennsylvania, USA

Abstract

Infection with Babesia microti has not been well-described in eastern Pennsylvania, USA, despite the vector of this organism being prevalent. We report 3 cases of babesiosis in eastern Pennsylvania in persons without recent travel outside the region or history of blood transfusions, suggesting emergence of this infection.

Keywords

• Babesiosis
• Babesia microti
• tick-borne illness
• emerging disease
• parasites
• protozoa