Lyme disease cases quadruple in Michigan as tick populations explode

Key Points:

• Lyme disease cases in Michigan have nearly quadrupled from 553 in 2022 to 2,167 in 2025, with ticks spreading more widely into suburban and urban areas, increasing the risk of infection.
• Michigan is now classified as a "high-incidence jurisdiction" by the CDC, reporting 18.83 Lyme disease cases per 100,000 population in 2025, and early 2026 data shows continued cases despite colder months.
• Symptoms of Lyme disease include fever, fatigue, headache, muscle and joint aches, and a distinctive bull's-eye rash; untreated cases can lead to severe complications affecting joints, heart, and nervous system.
• Not all ticks carry Lyme disease, but some can transmit other illnesses such as anaplasmosis, babesiosis, and Rocky Mountain spotted fever; prompt and proper tick removal is essential to reduce infection risk.
• Preventive measures include using insect repellents with DEET, wearing protective clothing, avoiding tick habitats, performing thorough tick checks after outdoor activities, and maintaining yards to reduce tick populations; no vaccine is currently available, though an investigational vaccine is in late-stage trials.