Tickpedia
Pathogen · taxon

Powassan virus

Tick-borne flavivirus transmitted by Ixodes scapularis (deer tick virus, lineage II) and I. cookei; causes severe encephalitis with high case fatality.

Detected · 96 countiesCarried by 1 tickCauses 1 disease

Where it's been detected

Open full breakdown →
Alaska — no detections on recordAKMaine — 4 countiesMEVermont — no detections on recordVTNew Hampshire — 2 countiesNHWashington — no detections on recordWAIdaho — no detections on recordIDMontana — no detections on recordMTNorth Dakota — no detections on recordNDMinnesota — 8 countiesMNWisconsin — 7 countiesWIMichigan — no detections on recordMINew York — 28 countiesNYMassachusetts — no detections on recordMAOregon — no detections on recordORNevada — no detections on recordNVWyoming — no detections on recordWYSouth Dakota — no detections on recordSDIowa — no detections on recordIAIllinois — no detections on recordILIndiana — no detections on recordINOhio — no detections on recordOHPennsylvania — 31 countiesPANew Jersey — 9 countiesNJConnecticut — 7 countiesCTCalifornia — no detections on recordCAUtah — no detections on recordUTColorado — no detections on recordCONebraska — no detections on recordNEMissouri — no detections on recordMOKentucky — no detections on recordKYWest Virginia — no detections on recordWVVirginia — no detections on recordVAMaryland — no detections on recordMDDelaware — no detections on recordDERhode Island — no detections on recordRIArizona — no detections on recordAZNew Mexico — no detections on recordNMKansas — no detections on recordKSArkansas — no detections on recordARTennessee — no detections on recordTNNorth Carolina — no detections on recordNCSouth Carolina — no detections on recordSCDistrict of Columbia — no detections on recordDCHawaii — no detections on recordHIOklahoma — no detections on recordOKLouisiana — no detections on recordLAMississippi — no detections on recordMSAlabama — no detections on recordALGeorgia — no detections on recordGATexas — no detections on recordTXFlorida — no detections on recordFLCOUNTIES · PER STATE
none
most counties

Detected in 96 counties across 8 states.

Top 8 states
#NameCounties
1Pennsylvania31
2New York28
3New Jersey9
4Minnesota8
5Wisconsin7
6Connecticut7
7Maine4
8New Hampshire2

Ticks that carry it

1 known
TickScientific nameOne-liner
Blacklegged tickIxodes scapularisThe black-legged tick is the primary US vector of Lyme disease, established across the Northeast, Upper Midwest, and Mid-Atlantic.

Diseases it causes

1 known
DiseaseOne-liner
Powassan virus diseasePowassan virus disease is a rare but severe tick-borne flavivirus infection causing encephalitis, spread by black-legged ticks in the Northeast.

Risk maps

H3 hexagon heatmap · per disease