Increasing Incidence of Spotted Fever Group Rickettsioses in the United States, 2010-2018.

Spotted fever group species are intracellular bacteria transmitted by tick or mite vectors and that cause human diseases referred to as spotted fever group rickettsioses, or spotted fevers. In the United States, the most recognized and commonly reported spotted fevers are Rocky Mountain spotted fever (RMSF) (), rickettsiosis, Pacific Coast tick fever ( species 364D), and rickettsialpox (). In this study, we summarize and evaluate surveillance data on spotted fever cases reported to the Centers for Disease Control and Prevention (CDC) through the National Notifiable Diseases Surveillance System from 2010 to 2018.