|Description:||Under a magnification of 6.5X, this image depicts a dorsal view of a soft tick, Ornithodoros hermsi, which is a known vector for the disease tick-borne relapsing fever (TBRF), which is a bacterial infection characterized by recurring episodes of fever, headache, muscle and joint aches, and nausea. It is caused by certain species of Borrelia spirochetes.|
There are two types of relapsing fever, Tick-borne relapsing fever (TBRF), and Louse-borne relapsing fever (LBRF). Tick-borne relapsing fever occurs in the western United States and is usually linked to sleeping in rustic, rodent-infested cabins in mountainous areas. Louse-borne relapsing fever is transmitted by the human body louse and is generally restricted to refugee settings in developing regions of the world.