The specific vector of this spirochete is the Ornithodoros hermsi tick (7), which is found in higher-elevation coniferous forests where its preferred rodent hosts, primarily squirrels and chipmunks, are also found (6).
Relapsing fever: Ornithodoros hermsi a vector in Colorado.
hermsii, and marked the first time this organism and its tick vector, Ornithodoros hermsi
, were shown to exist in Montana, said Tom G.
The possible role of birds as hosts for the vector Ornithodoros hermsi
ticks has been demonstrated elsewhere (4).
hermsii, transmitted by Ornithodoros hermsi
ticks, causes relapsing fever in the Western United States, and B.
The initial human cases of relapsing fever in California preceded identification of the vector, which was discovered to be a previously unidentified tick subsequently named Ornithodoros hermsi (4,5).
Relapsing fever in California: attempts to transmit spirochaetes of California relapsing fever to human subjects by means of the bite of the vector, Ornithodoros hermsi Wheeler.
In support of this theory, all stages of the tick vector Ornithodoros hermsi fed successfully on birds in the laboratory and advanced in their life cycle.
Tickborne relapsing fever in humans in North America is most often caused by the spirochete Borrelia hermsii, which is transmitted by its argasid tick vector, Ornithodoros hermsi (1).
hermsii in our culture collection originated in New Mexico, Colorado, California, and Washington State and were either from Ornithodoros hermsi
ticks, patients with relapsing fever, or, in one case, a bird (11).
Borrelia hermsii was isolated from the blood of two patients, and Ornithodoros hermsi
ticks were collected from the cabin, the first demonstration of this bacterium and tick in Montana.
hermsii, is transmitted by Ornithodoros hermsi
, a fast-feeding argasid tick.