Box 2: Arthropod vectors, animal reservoirs and associated Powassan virus lineage1,2
Ixodes cookeiGroundhogs, skunksPowassan virus lineage I
Ixodes marxiSquirrelsPowassan virus lineage I
Ixodes scapularisWhite-footed mice, deer micePowassan virus lineage II (deer tick virus)
Ixodes spinipalpisUnconfirmedUnspecified*
Dermacentor andersoniUnconfirmedPowassan virus lineage I
  • * The lineage of Powassan virus transmitted by Ixodes spinipalpis is not known.