Tick biology--There are three families of ticks recognized in the world today: (1) Ixodidae (hard ticks), (2) Argasidae (soft ticks
), and (3) Nuttalliellidae, a small, curious, little-known group with some characteristics of both hard and soft ticks
and soft tick
vectors of the Ornithodoros moubata complex or in a domestic cycle that involves pigs of local breeds with or without tick involvement (2-4).
Tickborne relapsing fever (TBRF) is caused by Borrelia species and is transmitted to humans by Ornithodoros soft ticks
However, most show limited capacity for transovarial transmission (21) since these spirochetes are typically transmitted through soft ticks
or clothing lice, both of which only feed for a short duration (<30 minutes) before sequestering in cracks and crevices or seams of clothing.
TICKBORNE RELAPSING FEVER is transmitted to humans through the bite of infected soft ticks
have mouthparts that allow them to hold fast to their host, as hard ticks do, but they do not secrete cement.
Entomologists divide ticks into two broad groups: hard ticks and soft ticks