Tickpedia
County-level presence

Where Babesia microti has been detected

Counties with at least one positive surveillance report for Babesia microti, aggregated to a state-level choropleth. Click any state to open its page.

Where it's been detected

pathogenCounty · status=present
Alaska — no detections on recordAKMaine — 16 countiesMEVermont — 11 countiesVTNew Hampshire — 10 countiesNHWashington — no detections on recordWAIdaho — no detections on recordIDMontana — no detections on recordMTNorth Dakota — no detections on recordNDMinnesota — 20 countiesMNWisconsin — 22 countiesWIMichigan — 1 countyMINew York — 52 countiesNYMassachusetts — 4 countiesMAOregon — no detections on recordORNevada — no detections on recordNVWyoming — no detections on recordWYSouth Dakota — no detections on recordSDIowa — 1 countyIAIllinois — 5 countiesILIndiana — 1 countyINOhio — 1 countyOHPennsylvania — 63 countiesPANew Jersey — 20 countiesNJConnecticut — 8 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 — 1 countyWVVirginia — 2 countiesVAMaryland — 3 countiesMDDelaware — 3 countiesDERhode Island — 1 countyRIArizona — 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 245 counties across 20 states.

Top 8 states
#NameCounties
1Pennsylvania63
2New York52
3Wisconsin22
4Minnesota20
5New Jersey20
6Maine16
7Vermont11
8New Hampshire10

Spread over time

cumulative counties detected
245184123610202320242025CUMULATIVE COUNTIES · PER YEAR