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Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted by the blacklegged tick. It is the most commonly reported vector-borne disease in the United States and it is spreading across the state of Michigan. Typical clinical signs include flu-like symptoms however, if left untreated may spread to joints, the heart, and/or the nervous system. The majority of cases can be treated successfully with antibiotics. Finding and removing ticks promptly can prevent Lyme disease.
National Lyme Disease Map
Anyone living or recreating where Lyme disease ticks may be present could become infected. Lyme disease is endemic (prevalent) in the Northeast, Northwest, and much of the North Central United States, including Wisconsin, Illinois, Indiana, and Pennsylvania.
Michigan Lyme Disease Risk Map
In Michigan's Upper Peninsula, multiple counties have well-established tick populations, due in part to the close proximity to Wisconsin. In the Lower Peninsula, the first confirmed infected population of blacklegged ticks were detected in 2002 along the west coast. Since that time, the tick and the bacterium have been invading northward along the Lake Michigan coast. However, currently, infected ticks are spreading and being detected across several portions of the Lower Peninsula.
What should I do if I think I might have Lyme disease?
If you believe you may have Lyme disease, consult with a healthcare provider for evaluation and diagnosis. If you have the tick that was attached to you, bring it with you to your appointment as the physician may be able to properly identify it. Alternatively, Michigan Department of Health and Human Services can also identify the tick(s) at no cost (see below).
How is Lyme disease diagnosed?
Lyme disease is diagnosed based on signs and symptoms in addition to a history of possible exposure to infected blacklegged ticks.
A healthcare provider may order laboratory blood tests for those individuals experiencing symptoms of Lyme disease in order to assist in proper diagnosis. Additionally, Michigan Department of Health and Human Services offers testing at no cost to Michigan citizens, when ordered through their healthcare provider (see link below for information).
What should I do if I have a tick that I want to have identified?
Knowing what kind of tick bit you may be important in knowing what your risk of disease is. The Michigan Department of Health and Human Services (MDHHS) provides tick identification at no charge to Michigan citizens. There are two ways to have a tick identified, 1) By submitting a photo of your tick, or, 2) by sending the tick to the MDHHS for microscopic identification.
Healthcare providers may submit live ticks removed from human patients directly to MDHHS Bureau of Laboratories (BoL) for identification and testing. MDHHS does not recommend using tick testing results to guide treatment.
Lyme disease information for clinicians
For guidelines, a webinar, and resources please see our Lyme information webpage.
- The Tick Management Handbook
An integrated guide for homeowners, pest control operators, and public health officials for the prevention of tick-associated disease (Connecticut Agricultural Experiment Station)
- Tick Bite and Lyme Disease Prevention in Michigan
- Tick Bite Prevention in Michigan's Outdoors
- CDC: What To Do After a Tick Bite
- CDC: Guidance for Clinicians: Recommendations for Patients After a Tick Bite
- Centers for Disease Control and Prevention Lyme Disease Printed Materials
- MDHHS Lyme disease information for Clinicians
Guidelines, webinar, and resources for healthcare providers.
- Communicable Disease Division Publication Order Form
The following Lyme disease publications can be ordered free of charge to Michigan local health departments, healthcare providers, social services agencies, and others:
- Ticks and Your Health Booklet
- Be Aware Trail Head Posting
- Tick Bite Prevention in Michigan's Outdoors Poster
- Tick Bite and Lyme Disease Prevention in Michigan Poster
- Michigan Tick ID Card (2"x3.5" business card size)
- Tick Submission Kit
- Poster: Looking for a bull's-eye rash? Look again-erythema migrans can take many forms.
- Frequently Asked Questions
- Lifecycle of Blacklegged Ticks
- Lyme disease: What you need to know
- Michigan Tick ID Card
Pocket-sized card for identifying common ticks in Michigan. Information regarding tick removal and tick-bite prevention.
- Tick Removal
- Michigan Lyme Disease Risk Map
- Healthcare Provider Lyme Disease Toolkit
- Michigan's Five Most Common Ticks
Ticks are significant vectors (carriers) of pathogens that cause human and animal disease. In Michigan, tick-borne diseases are rare, but they do occur and can be serious if not properly diagnosed and treated.
- Tickborne Diseases of the U.S.
- Tickborne Diseases of the U.S. - information from the CDC
- Ticks and Your Health
Brochure describing Lyme disease and other tick-borne diseases in Michigan. Other topics covered include tick-bite prevention, preventing ticks on pets, and landscape techniques to minimize tick risk.
Michigan Lyme Disease Maps and Statistics:
Map of cases by county
Map of risk by county
Michigan 2019 Tickborne Disease Surveillance Summary
Michigan citizen submitted ticks by county
Michigan Lyme Disease Risk Map 2021
Michigan Lyme Disease Risk maps, historical compilation 2014-2021
National Lyme Disease Maps and Statistics: