The map does not represent the risk of contracting any specific tickborne illness. However, tick abundance within this area varies locally. This map shows the estimated distribution of Ixodes scapularis tick populations, commonly known as blacklegged or deer ticks. Stages most likely to bite humans are nymphs and adult females. However, adults may be out searching for a host any time winter temperatures are above freezing. miyamotoi ( hard tick relapsing fever), Ehrlichia muris eauclairensis ( ehrlichiosis), Babesia microti( babesiosis), and Powassan virus ( Powassan virus disease).Ĭomments: The greatest risk of being bitten exists in the spring, summer, and fall. mayonii (which cause Lyme disease), Anaplasma phagocytophilum ( anaplasmosis), B. Where found: Widely distributed across the eastern United States. Background data for this map is from the US National Atlas. 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. 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. Adult females are most likely to bite humans.

Transmits: Tularemia and Rocky Mountain spotted fever.Ĭomments: The highest risk of being bitten occurs during spring and summer. See county-level estimated and established distribution. More research is needed to understand the role of these species in disease transmission. similis is found west of the Rocky Mountains. Also occurs in limited areas on the Pacific. variabilis is widely distributed east of the Rocky Mountains.

Global distribution of alpha + cities