Scientific Name: Ixodes scapularis

Known Location(s):

  • Northeastern United States
  • Upper midwestern United States

Centers for Disease Control and Prevention - Blacklegged Tick

This map is not meant to represent risks for a specific tick-borne disease, because disease transmission is influenced by multiple factors beyond mere tick presence. This map has been designed to answer the question “What ticks should I be concerned about at a regional scale?” Please consult a local public health authority or USDA Agricultural Extension Office to determine more specific information at the state, county, or municipal level. Background data for this map is from the US National Atlas.

Sighting and Biting notes:

  • Spring, summer and fall are greatest risk of being bitten.
  • However, adults may be out searching for a host anytime winter temperatures are above freezing.
  • Nymphs and adult females are most likely to bite humans.
  • Sometimes known as a ‘Deer Tick’.

Potential to Carry: 

  • Anaplasmosis
  • Babesiosis
  • Lyme disease
  • Powassan disease

References:

  • U.S. Department of Health and Human Services; Centers for Disease Control and Prevention (2017, May 12).  TICKBORNE DISEASES OF THE UNITED STATES A Reference Manual for Health Care Providers Fourth Edition, 2017.Centers for Disease Control and Prevention. Retrieved from https://www.cdc.gov/lyme/resources
  • U.S. Department of Health and Human Services; Centers for Disease Control and Prevention, Office of the Associate Director for Communications, Division of Public Affairs; James Gathany. (Photographer). (2005). Public Health Image Library. Retrieved from https://phil.cdc.gov/