Lyme & Ticks

Lyme Disease in Washtenaw County

Washtenaw County is now confirmed as an area where Lyme disease can be transmitted. Lyme disease is spread by the bite of an infected blacklegged tick (Ixodes scapularis, also known as deer tick).

All residents and visitors are urged to "fight the bite" against ticks and tick-borne disease. Transmission season for Lyme disease in Michigan typically occurs from May through August, with a peak in June. Frequent tick checks are important during this time of year. Prompt removal of ticks can prevent Lyme disease infection.

Lyme Disease Cases in Washtenaw County Residents


2020 2021*
Likely exposed in Washtenaw County
Likely exposed in other Michigan county
Likely exposed outside Michigan (including international)
Total cases

Counts as of 9/30/2021

Note: Case numbers reflect individuals who met the CDC criteria for Confirmed and Probable case classification for Lyme disease. In 2017, a Suspected classification was added. Lyme transmission was confirmed in Washtenaw County in 2016. *These counts are preliminary and subject to change. 

Tick Identification

Note: The Michigan Department of Health and Human Services is no longer testing ticks for disease-causing agents. Ticks can be submitted for identification only. The state laboratory is focusing on COVID-19 testing and is complying with CDC recommendation regarding tick testing.

If you find a tick and would like to have it identified, you can send a photo of the tick via email. See the instructions on submitting a photo for identification or email [email protected].

You can also stop by either of our locations for a free kit to mail your tick to the state lab for identification (this program has been paused as of Spring 2021). You can also submit a tick to the state without using a special tick kit. See the instructions on submitting a tick for identification. Note that ticks submitted to the state will only be identified - they will NOT be tested.

About Lyme Disease

Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted to humans through the bite of infected blacklegged ticks. Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migrans. If left untreated, infection can spread to joints, the heart, and the nervous system. Lyme disease is diagnosed based on symptoms, physical findings (e.g., rash), and the possibility of exposure to infected ticks. In the United States, an estimated 300,000 Lyme disease infections occur each year. 

Michigan’s five most common ticks can be seen here

Tick Information

Treatment & Prevention

Most cases of Lyme disease can be treated successfully with antibiotics. Patients treated with appropriate antibiotics in the early stages of Lyme disease usually recover rapidly and completely. Antibiotics commonly used for oral treatment include doxycycline, amoxicillin or cefuroxime axetil.

Steps to prevent Lyme disease include using insect repellent, removing ticks promptly, applying pesticides and reducing tick habitat. While it is a good idea to take preventive measures against ticks year-round, be extra vigilant in warmer months (April-September) when ticks are most active.

Tick checks and prompt removal are also important. In most cases, the tick must be attached for 36 to 48 hours or more before the Lyme disease bacterium can be transmitted. 

Avoid Direct Contact with Ticks

  • Avoid wooded and bushy areas with high grass and leaf litter.
  • Walk in the center of trails.

Repel Ticks with DEET or Permethrin

  • Use repellents that contain 20% or more DEET (N, N-diethyl-m-toluamide) on the exposed skin for protection that lasts up to several hours. Always follow product instructions. Parents should apply this product to their children, avoiding hands, eyes and mouth.
  • Use products that contain permethrin on clothing. Treat clothing and gear, such as boots, pants, socks and tents. It remains protective through several washings. Pre-treated clothing is available as well.
  • Other repellents registered by the Environmental Protection Agency (EPA) may also be effective at preventing ticks. An insect repellent search tool: Find the Insect Repellent that is Right for You.

Find & Remove Ticks from Your Body

  • Bathe or shower as soon as possible after coming indoors (preferably within two hours) to wash off and more easily find ticks that are crawling on you.
  • Conduct a full-body tick check using a hand-held or full-length mirror to view all parts of your body upon return from tick-infested areas. Parents should check their children for ticks under the arms, in and around the ears, inside the belly button, behind the knees, between the legs, around the waist, and especially in their hair.
  • Examine gear and pets. Ticks can ride into the home on clothing and pets, then attach to a person later, so carefully examine pets, coats, and day packs. Tumble clothes in a dryer on high heat for an hour to kill remaining ticks.
  • To remove a tick, use tweezers and grip the body firmly and pull straight out of the skin. Do not twist the tick. After removing the tick, clean the bite area and your hands. If you choose to dispose of a live tick, submerse it in alcohol in a sealed bag or container, wrap tightly in tape or flush it down the toilet. Never crush a tick with your fingers.
Michigan Lyme Disease Risk Map