Tiny Invasive Tick that Spreads Disease Found in Michigan for First Time
BERRIEN COUNTY, MICHIGAN, JUN 12 – Michigan found two Asian longhorned tick nymphs at Grand Mere State Park, raising concerns for livestock health due to their ability to reproduce rapidly and spread several diseases.
- Calvin University research students discovered the invasive Asian longhorned tick in Berrien County, Michigan, confirmed on June 11, 2025.
- This discovery followed routine tick surveillance at Grand Mere State Park, part of ongoing efforts that started in 2020 to study tick ecology and distribution.
- The Asian longhorned tick, native to East Asia, poses a serious disease risk to mammals and birds and threatens livestock health with potential large infestations.
- State Veterinarian Dr. Nora Wineland emphasized that this finding underscores the importance of working closely with academic institutions and maintaining ongoing partnerships to protect animal health across Michigan.
- Officials urge animal owners to take preventative measures, including tick checks, treating animals, and maintaining clear pastures, to protect animal and public health.
20 Articles
20 Articles


Asian Longhorned Ticks Discovered in Berrien County
LANSING – The Michigan Department of Agriculture and Rural Development (MDARD) is reporting the first detection of the Asian longhorned tick (ALHT) in the state. Two ALHT nymphs were found through routine tick surveillance efforts, which were being conducted at…
Invasive tick species found in Berrien County
GRAND RAPIDS, Mich. (WOOD) — The first Asian longhorned ticks in the state have been found in Berrien County. Calvin University researchers found the two ticks during routine surveillance at Grand Mere State Park, according to the Michigan Department of Agriculture and Rural Development. "Calvin research students have been studying the ecology and distribution of ticks in West Michigan since 2020," said William Miller, assistant professor of bio…
Coverage Details
Bias Distribution
- 55% of the sources are Center
Factuality
To view factuality data please Upgrade to Premium