Asian longhorned tick identified in Kansas, health department says
The Kansas Department of Health and Environment (KDHE) and the Kansas Department of Agriculture (KDA) have confirmed the first detection of the Asian longhorned tick (ALHT) in Kansas. The invasive parasite was identified last week on a dog in Franklin County, marking its westernmost spread in the United States to date.
First detected in the U.S. in 2017, the Asian longhorned tick has now been documented in 21 states, according to the U.S. Department of Agriculture (USDA). The tick’s rapid expansion raises concern among both public health and veterinary officials.
“We have been monitoring the spread of the Asian longhorned tick, especially since it was confirmed in neighboring states,” said Dr. Justin Smith, Kansas Animal Health Commissioner. “Now that it has been identified here, we’ve reached out to veterinarians statewide to ensure they understand the risks and remain alert for this tick.”
Unlike most tick species, the ALHT can reproduce without mating, allowing populations to grow quickly. The tick poses risks to both humans and animals and has been linked to the transmission of several diseases. In 2019, one was found carrying Bourbon virus in Virginia, and more recently, a specimen in Connecticut tested positive for ehrlichiosis. Both pathogens are known to occur in Kansas, typically transmitted by the Lone Star tick.
“We’re still learning about the ecological role of this tick and its potential for disease transmission to humans,” said Dr. Erin Petro, KDHE State Public Health Veterinarian. “While the human health implications are uncertain, this tick has serious implications for animal health.”
The Asian longhorned tick can cause massive infestations on livestock and pets, leading to severe anemia or even death. It is also a known vector for the cattle parasite Theileria orientalis Ikeda strain, which causes bovine theileriosis, a disease associated with fever, weakness, and reduced milk production.
To improve early detection, KDHE launched a tick surveillance program in 2024 involving veterinary clinics across Kansas. Participating clinics submit samples from animals for identification and tracking. The Franklin County detection came from one such submission and was later confirmed by the USDA.
Officials emphasize that tick bite prevention remains the most effective defense for both humans and animals. Pet owners are encouraged to use veterinarian-recommended tick preventives, and livestock producers should maintain regular herd checks and environmental management practices to reduce exposure.
