Amblyomma cajennense (sensu lato) - now recognized as a complex of six closely related species - is the principal Latin American vector of Rickettsia rickettsii and the cause of Brazilian spotted fever, the most lethal spotted fever in the world. Adults have unusually long mouthparts and bite indiscriminately across mammals, birds, and reptiles.
Amblyomma cajennense is cold-sensitive and active year-round in the Caribbean, Mexico, Central America, and lowland South America, but…
Rhipicephalus sanguineus is a competent vector of Rickettsia rickettsii in the southwestern United States and northern Mexico, where…
Amblyomma maculatum was once confined to a coastal band along the Gulf of Mexico. Established populations now reach Connecticut and the…
A single tick species, Amblyomma americanum, transmits ehrlichiosis from Ehrlichia chaffeensis and E. ewingii, tularemia, Heartland virus,…
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.…