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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.
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The Peterborough Examiner broke the news in Peterborough, Canada on Thursday, June 12, 2025.
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