Tickpedia
IXODES PACIFICUSIXODIDAE · HARD TICK
Ixodidae · hard tick

Western blacklegged tick

Ixodes pacificus

The western black-legged tick carries Lyme disease and anaplasmosis along the Pacific Coast from California to British Columbia.

High dangerCarries 2 diseasesPathogens · 2Established · 97 counties

Where it’s established

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Alaska — no established countiesAKMaine — no established countiesMEVermont — no established countiesVTNew Hampshire — no established countiesNHWashington — 17 counties establishedWAIdaho — no established countiesIDMontana — no established countiesMTNorth Dakota — no established countiesNDMinnesota — no established countiesMNWisconsin — no established countiesWIMichigan — no established countiesMINew York — no established countiesNYMassachusetts — no established countiesMAOregon — 18 counties establishedORNevada — no established countiesNVWyoming — no established countiesWYSouth Dakota — no established countiesSDIowa — no established countiesIAIllinois — no established countiesILIndiana — no established countiesINOhio — no established countiesOHPennsylvania — no established countiesPANew Jersey — no established countiesNJConnecticut — no established countiesCTCalifornia — 55 counties establishedCAUtah — 6 counties establishedUTColorado — no established countiesCONebraska — no established countiesNEMissouri — no established countiesMOKentucky — no established countiesKYWest Virginia — no established countiesWVVirginia — no established countiesVAMaryland — no established countiesMDDelaware — no established countiesDERhode Island — no established countiesRIArizona — 1 county establishedAZNew Mexico — no established countiesNMKansas — no established countiesKSArkansas — no established countiesARTennessee — no established countiesTNNorth Carolina — no established countiesNCSouth Carolina — no established countiesSCDistrict of Columbia — no established countiesDCHawaii — no established countiesHIOklahoma — no established countiesOKLouisiana — no established countiesLAMississippi — no established countiesMSAlabama — no established countiesALGeorgia — no established countiesGATexas — no established countiesTXFlorida — no established countiesFLCOUNTIES ESTABLISHED
absent
established

Established in 97 counties across 5 states.

Top 5 states
#NameCounties
1California55
2Oregon18
3Washington17
4Utah6
5Arizona1

Diseases it carries

2 known

Pathogens it carries

2 known
PathogenScientific nameOne-liner
Anaplasma phagocytophilumAnaplasma phagocytophilumIntracellular bacterium that causes anaplasmosis (formerly human granulocytic ehrlichiosis); carried by Ixodes scapularis and I. pacificus.
Borrelia burgdorferiBorrelia burgdorferi sensu strictoSpirochete that causes Lyme disease in the eastern US (carried by Ixodes scapularis) and on the west coast (carried by Ixodes pacificus).

Remove, prevent, and what to do after

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Wild facts

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