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Asian Longhorned Tick Detected in Michigan for First Time

The Asian longhorned tick, an invasive species now found in Michigan, poses a risk to livestock health.

News Summary

For the first time, the Asian longhorned tick has been found in Michigan, raising concerns for livestock and wildlife health. Discovered by Calvin University students at Grand Mere State Park, the tick is known for its severe health risks to various host animals, including cattle. As an invasive species, it poses a threat to Michigan’s agriculture and ecosystem. The Michigan Department of Agriculture and Rural Development urges vigilance among livestock owners to monitor and manage infestations as this species spreads.

Berrien County, Michigan – The Asian longhorned tick has been detected for the first time in Michigan, raising significant concerns for wildlife and livestock health. The announcement was made by the Michigan Department of Agriculture and Rural Development (MDARD) on June 13, 2023, following the confirmation of two nymphs found at Grand Mere State Park by research students from Calvin University. The confirmation was received from the U.S. Department of Agriculture’s National Veterinary Services Laboratories (NVSL) on June 11, marking a critical development in the state’s agricultural landscape.

The Asian longhorned tick, measuring approximately 1 mm in width and characterized by its light brown color, is an invasive species native to East Asia. Its presence in the U.S. was first documented in New Jersey in 2017, and since then, the insect has expanded its range to 21 additional states, including neighboring Indiana and Ohio. The tick is known for its ability to form large infestations on a single host animal, which poses severe health risks, particularly for livestock.

This species can attach to various hosts, including wildlife, domestic livestock such as cattle, sheep, goats, and chickens, as well as pets like dogs and cats, and even humans. While the Asian longhorned tick does not carry Lyme disease, it is known to transmit other diseases, including Rocky Mountain spotted fever, heartland virus, and Powassan virus. Furthermore, its capacity to cause severe blood loss in livestock is particularly alarming for farmers and ranchers as it can lead to detrimental impacts on animal health and agricultural yields.

Of particular concern is the tick’s role in spreading a pathogen responsible for bovine theileriosis, a disease that can severely affect cattle populations. In light of this discovery, MDARD encourages livestock and pet owners to consult veterinarians for tick treatment and emphasizes the importance of regularly checking animals for tick presence. Additional recommendations include maintaining short grass in lawns and pastures to reduce encounters with ticks.

The discovery of the Asian longhorned tick highlights the importance of ongoing surveillance and research into tick ecology. William Miller, an assistant professor of biology at Calvin University, noted that research students have been actively studying tick ecology and distribution in West Michigan since 2020. This collaborative effort underscores the significance of academic partnerships in tackling agricultural and ecological challenges associated with invasive species.

Invasive species such as the Asian longhorned tick pose threats to native biodiversity by preying on and out-competing native species. The potential ramifications of its spread are increasing concern among environmentalists and agricultural professionals, alike. The situation necessitates public awareness and proactive measures to safeguard both livestock health and the broader ecosystem.

As the population of Asian longhorned ticks expands, vigilance is paramount. Livestock owners are urged to stay informed about the risks associated with these ticks and implement preventive measures to protect their animals. With the incidence of this invasive species reaching Michigan, stakeholders must remain attentive and proactive in addressing the challenges it poses to health and agriculture.