Asian Longhorned Tick- An Emerging Threat to U.S. Livestock

By Dave Boxler

Key Points for Producers 

• The Asian Longhorned Tick has not yet been confirmed in Nebraska, but it has been detected in nearby states including Kansas and Iowa. 
• This tick can reproduce without mating, allowing populations to increase rapidly once introduced. 
• Asian Longhorned Tick can transmit Theileria orientalis Ikeda, a parasite that causes theileriosis in cattle. 
• Routine inspection of cattle during handling is one of the most effective ways to detect ticks early. 
• Integrated management, including insecticides, pasture management, and careful inspection of new cattle, can help reduce risk. 

Why the Asian Longhorned Tick Is a Concern 

An invasive tick capable of reproducing rapidly and transmitting disease to cattle has been detected in states neighboring Nebraska, making awareness and early detection increasingly important for livestock producers. 

Although the Asian Longhorned Tick (ALHT) has not yet been confirmed in Nebraska, its detection in nearby states such as Kansas and Iowa (Figure 1) suggests that producers in the region should remain alert. Early detection is important because this tick has the potential to establish quickly once it is introduced into favorable environments. Producers should be particularly watchful when cattle are grazing in areas with tall grass, brush, wooded edges, or moist, low-lying habitats where ticks tend to survive and reproduce more easily. 

One reason the Asian Longhorned Tick is a concern is its ability to transmit pathogens that affect livestock. Of particular importance is Theileria orientalis Ikeda, a protozoan parasite that infects cattle and causes a disease known as theileriosis. Infected cattle may experience anemia, weakness, reduced appetite, and abortions in severe cases. Heavy tick infestations alone can also cause problems by removing large amounts of blood, which may lead to stress, weakness, and in extreme cases death.