Soft tick relapsing fever in the United States is largely a disease of mountain cabins above 3,000 feet in California, Nevada, Arizona, Idaho, Washington, and Oregon. Family-cluster outbreaks are common: a single rodent-infested cabin can infect everyone who sleeps there over a weekend.
Ornithodoros hermsi is a soft tick that lives in rodent nests inside walls and rafters of mountain cabins from California to Idaho. It…
Dermacentor occidentalis transmits Rickettsia 364D (now classified as Rickettsia rickettsii subsp. californica), the cause of Pacific…
Colorado tick fever presents in the Mountain West as a sudden biphasic fever with chills, headache, and myalgia, often mistaken for summer…
Rhipicephalus sanguineus is a competent vector of Rickettsia rickettsii in the southwestern United States and northern Mexico, where…
A single tick species, Amblyomma americanum, transmits ehrlichiosis from Ehrlichia chaffeensis and E. ewingii, tularemia, Heartland virus,…
Reported United States Powassan virus cases rose from a handful per year through the 1990s to roughly 30 to 50 per year by the early…