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Ehrlichiosis

Ehrlichiosis is an illness spread by ticks. There are several types of bacteria that cause ehrlichiosis in Wisconsin. Ticks that can spread these bacteria are found in every county in Wisconsin.

Not all tick bites will make you sick, but it’s important to take steps to protect yourself and your family while enjoying time outdoors.

Ehrlichiosis is preventable and treatable. Learn more about Tick Bite Prevention.

Read about Treatment and Signs and Symptoms from the CDC (Centers for Disease Control and Prevention).

About Ehrlichiosis

Tick crawling on skin

Learn more about ehrlichiosis, including signs and symptoms, treatment, and resources.

Learn more about ehrlichiosis.

Data

Line graph representing data trends with blurred people in background

Map and charts with ehrlichiosis data.

View the number of reported cases of ehrlichiosis.

 

Reporting and surveillance

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Local or Tribal health departments and health care providers can learn about disease reporting, testing, treatment, and more.

Information for health care professionals.

Tick Bite Prevention

Adult applying insect repellent to a child at a park

Tips to prevent tick bites.

See the steps you should take to "fight the bite."

Contact us

Questions about illnesses spread by ticks? We’re here to help.

Bureau of Communicable Diseases
Phone: 608-267-9003
Fax: 608-261-4976

Last revised April 10, 2023