title: Geographic Distribution and Expansion of Human Lyme Disease, United States.
abstract: Lyme disease occurs in specific geographic regions of the United States. We present a method for defining high-risk counties based on observed versus expected number of reported human Lyme disease cases. Applying this method to successive periods shows substantial geographic expansion of counties at high risk for Lyme disease.
authors.forename: Kiersten J
authors.initials: KJ
authors.lastname: Kugeler
authors.forename: Grace M
authors.initials: GM
authors.lastname: Farley
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Forrester
authors.forename: Paul S
authors.initials: PS
authors.lastname: Mead
mesh_terms: D000818:Animals; D004199:Disease Vectors; D062305:Geographic Mapping; D006801:Humans; D008193:Lyme Disease / Q000453:epidemiology* / Q000635:transmission; D013987:Ticks; D014481:United States / Q000453:epidemiology
keywords: Borrelia burgdorferi; Lyme disease; United States; bacteria; epidemiology; surveillance; tickborne; vector-borne infections; zoonoses