Dermacentor occidentalis is found only along the Pacific coast of California, Oregon, and Washington and inland through California's coast ranges. It bites people most often in late summer in chaparral and oak woodland and also vectors a strain of anaplasmosis and Francisella tularensis.
Dermacentor occidentalis transmits Rickettsia 364D (now classified as Rickettsia rickettsii subsp. californica), the cause of Pacific…
Dermacentor variabilis adults have ornate white-and-brown mottling on the scutum and are roughly the size of a watermelon seed when unfed.…
Ixodes pacificus is the western counterpart of Ixodes scapularis, found from British Columbia south through the Pacific states. It…
Dermacentor andersoni inhabits shrub and grassland between roughly 4,000 and 10,500 feet of elevation in the Rocky Mountain west and…
Amblyomma maculatum was once confined to a coastal band along the Gulf of Mexico. Established populations now reach Connecticut and the…
Rhipicephalus sanguineus is a competent vector of Rickettsia rickettsii in the southwestern United States and northern Mexico, where…