Dermacentor occidentalis

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Related to Dermacentor occidentalis: Dermacentor andersoni

Der·ma·cen·tor oc·ci·den·ta·'lis

the Pacific Coast tick, a species found on all domestic herbivores, deer, dogs, humans, and other animals in California and Oregon.


a genus of ticks parasitic on various animals, and vectors of disease-producing microorganisms; member of the family Ixodidae.

Dermacentor albipictus
a one-host tick that transmits anaplasmosis and possibly Rocky Mountain spotted fever. Parasitizes moose mostly but also other wild ruminants and pastured livestock. Called also moose tick, winter tick.
Dermacentor andersoni
a species of tick common in the western USA, parasitic on numerous wild mammals, most domestic animals, and humans. It is a vector of Rocky Mountain spotted fever, tularemia, Colorado tick fever, and Q fever in the USA, and is one of the causes of tick paralysis in USA.
Dermacentor halli, Dermacentor marginatus, Dermacentor nuttalli, Dermacentor silvarum
miscellaneous ticks of little importance to animals.
Dermacentor nigrolineatus
a one-host tick occurring mostly on white-tailed deer, but also on pastured livestock. Called also brown winter tick.
Dermacentor nitens
a one-host tick that parasitizes horses mostly and is the vector of equine piroplasmosis; predisposes animals to screw-worm attack. Called also tropical horse tick, Anocentor nitens.
Dermacentor occidentalis
a three-host tick found on many animals. Immature forms are on rodents. Transmits anaplasmosis, Colorado tick fever, Q fever, tularemia, causes tick paralysis. Called also Pacific Coast tick.
Dermacentor parumapterus
a vector of Rocky Mountain spotted fever.
Dermacentor reticulatus
a three-host tick that transmits equine piroplasmosis.
Dermacentor variabilis
a three-host tick that transmits Anaplasma marginale in cattle, tularemia in humans, is the chief vector of Rocky Mountain spotted fever in the central and eastern USA and causes tick paralysis in the dog. The dog is the principal host of the adult forms, but also parasitic on cattle, horses, rabbits and humans. Called also American dog tick.
Dermacentor venustus
see Dermacentor andersoni (above).