Tickborne Pathogen Surveillance
The maps below show the projected suitable habitat for blacklegged ticks and where select pathogens have been found in blacklegged tick populations.
These pathogens have been identified in host-seeking Ixodes scapularis (blacklegged ticks) or Ixodes pacificus (western blacklegged ticks).
Lyme disease spirochetes
Map showing where Borrelia burgdorferi sensu stricto (s.s.) and Borrelia mayonii have been found in blacklegged and western blacklegged ticks through 2025.
Borrelia miyamotoi
Map showing where Borrelia miyamotoi has been identified in blacklegged and western blacklegged ticks through 2025.
Anaplasma phagocytophilum (human active variant)
Map showing where the human active variant of Anaplasma phagocytophilum has been identified in blacklegged and western blacklegged ticks through 2025.
Ehrlichia muris eauclairensis
Map showing where Ehrlichia muris eauclairensis has been identified in blacklegged and western blacklegged ticks through 2025.
Powassan virus
Map showing where Powassan virus has been identified in blacklegged and western blacklegged ticks through 2025.
Babesia microti
Map showing where Babesia microti has been identified in blacklegged and western blacklegged ticks through 2025.
