Which tick species are commonly found in Oregon but do not transmit Lyme disease?
Answer
Pacific Coast tick and American dog tick
The Pacific Coast tick, known as Dermacentor occidentalis, and the American dog tick, known as Dermacentor variabilis, are commonly encountered in Oregon. Despite their presence, these species do not carry or transmit the bacterium Borrelia burgdorferi. Confusion often arises because people misidentify these ticks as Lyme-carrying ticks, leading to unnecessary alarm when they are found on humans or pets.
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