Illinois e-News Release


FOR IMMEDIATE RELEASE
May 6, 2024


CONTACT:
Lori Harlan (217) 670-9283

ASIAN LONGHORNED TICK CONFIRMED IN ILLINOIS

SPRINGFIELD, IL – Illinois is the 20th state to discover the Asian longhorned tick (Haemaphysalis longicornis). The tick, considered an invasive species, was found on April 12 during routine active tick surveillance in Morgan County as part of an Illinois Department of Public Health (IDPH) grant-funded active tick surveillance program. Additional surveillance in the area on April 24 discovered two additional Asian longhorned ticks.

Identification was confirmed by entomologists at the National Veterinary Services Laboratory.

While the tick was first introduced to the U.S. in 2017, this is the first known collection of this tick species from anywhere in Illinois.

Asian longhorned ticks are light brown in color and are very small, often smaller than a sesame seed. The tick is capable of carrying tick borne diseases that affect cattle. In addition, a female can reproduce without a mate and lay up to 2,000 eggs at a time. Therefore, numbers may expand rapidly.

“In some cases of severe H. longicornis infestation, livestock death has been reported,” said Dr. Mark Ernst, Illinois Department of Agriculture (IDOA) State Veterinarian. “Farmers and producers should continue working with their veterinarian to maintain an appropriate management plan.”

The IDOA, IDPH and the Illinois Department of Natural Resources (IDNR) are monitoring the situation in partnership with the United States Department of Agriculture.

“IDPH’s active tick surveillance program was instrumental in discovering the Asian long horned tick in Illinois,” said IDPH Director Dr. Sameer Vohra. “Although the role that this tick will play in the transmission of infections in humans is yet to be determined, the Department of Public Health is working closing with the Department of Agriculture to monitor the presence of the tick and investigate the risk it carries to both humans and livestock.”

Tick Prevention Tips:
If anyone believes they have identified H. longicornis on an animal, the tick should be placed in a jar with isopropyl alcohol, and the Department of Agriculture should be contacted at 217 782-4944.

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