Lyme Disease Surveillance in Wisconsin

Statewide surveillance for Lyme disease in Wisconsin has been conducted since 1980. A surveillance case definition provided by the Centers for Disease Control and Prevention (CDC) that defines a Lyme disease case by one of two criteria is used: 

1. Physician-diagnosed erythema migrans (EM) > 5 cm in diameter; or 
2. A positive serologic test or culture and at least 1 late manifestation, defined as joint swelling, Bell's palsy or other cranial neuritis, radiculoneuropathy, lymphocytic meningitis, encephalitis /  encepahalomyelitis with Borrelia burgdorferi titer in CSF higher than serum, or 2nd or 3rd degree atrioventricular block. 

As a reminder, the CDC surveillance case definition is for disease surveillance purposes and not for clinical diagnosis of individual patients.

• Statewide Surveillance Data Lyme disease cases reported to the Wisconsin Division of Public Health, 1980-2006 

• Lyme disease incidence by age group for cases reported to the Wisconsin Division of Public Health, 2006 

• Month of illness onset for Lyme disease case patients reported to the Wisconsin Division of Public Health, 2006 

• Mean annual Lyme disease incidence per 100,000 persons by county of residence, 2002-2006

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Last Revised: October 19, 2007