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Lyme Disease Incidence by Year, New Jersey, 2007 to 2020

Indicator Report Data View Options

Why Is This Important?

Lyme disease is primarily caused by bacteria called ''Borrelia burgdorferi'' and is transmitted to humans through the bite of infected blacklegged ticks (or deer ticks, ''Ixodes scapularis''). Typical symptoms include chills, fever, bull's-eye rash, headache, and muscle pain. Lyme disease affects the central nervous system, heart, and joints in its advanced stages.


Incidence (new cases) of Lyme disease Data were captured by county of residence, not county of exposure.

Data Notes

The graph displays the incidence rate of Lyme Disease from 2007 through 2020 in New Jersey. Annual estimates of the resident population (July 1, 2007-2020) were used to calculate New Jersey Lyme disease incidence rates by year. National surveillance case definition was revised in 2008 to include probable cases. 2007 incidence rate was calculated using confirmed cases. Incidence rates from 2008 to 2020 were calculated using confirmed and probable cases.

Data Sources

How the Measure is Calculated

  • Numerator:

    Number of Lyme disease cases reported to the New Jersey Department of Health
  • Denominator:

    Estimated number of persons in the population

Health Topic Pages Related to: Lyme Disease Incidence

Indicator Data Last Updated On 03/21/2022, Published on 06/05/2024
Communicable Disease Service, Infectious and Zoonotic Disease Program, New Jersey Department of Health, Trenton, NJ, 08625 (