3), so vector roles of both species should not be overlooked.
TBRF courses with febrile episodes and should be considered as a differential diagnosis within the spectrum of diseases that cause an undifferentiated febrile syndrome (UFS) (
6). Although specific data are vague for the states where tick collections were performed in this study, UFS is common in Brazil; mosquitoborne viruses and malaria are the main etiologic agents (
8). Nevertheless, febrile illnesses still remain underdiagnosed in a substantial proportion of the cases in the country (
8). The results of this study are a contribution to the knowledge of RFGB in human-biting
Ornithodoros ticks, and stress the investigation of TBRF as a possible cause of UFS in Brazil. It is known that antibodies of patients exposed to RFGB infection cross-react in serologic tests for the diagnosis of Lyme borreliosis (