Ecological niche modeling and distribution of Ornithodoros hermsi
associated with tick-borne relapsing fever in western North America.
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).
hermsii, and marked the first time this organism and its tick vector, Ornithodoros hermsi
, were shown to exist in Montana, said Tom G.
Most TBRF cases in the United States are caused by Borrelia hermsii and transmitted by Ornithodoros hermsi
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.
One live soft tick (Ornithodoros hermsi
), four chipmunks, one wood rat, and two deer mice were recovered.
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
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
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.