By Jamie Martin
Researchers in Arkansas are working to control a dangerous cattle disease that is spreading across the state. The disease, known as bovine theileriosis, is caused by the parasite Theileria orientalis Ikeda and is mainly transmitted by the Asian longhorned tick.
Since its arrival in Arkansas, the disease has spread rapidly, with cases rising sharply in 2025. Farmers have reported major herd losses, creating financial stress for many operations.
To address this issue, scientists at the Arkansas Agricultural Experiment Station have started a research project supported by the US Department of Agriculture. The project provides funding for two years to test effective solutions.
The research team, led by Emily McDermott and supported by experts such as Kelly Loftin and Jeremy Powell, is evaluating two treatment methods. One is a prescription vaccine targeting ticks, while the other is a slow-release parasiticide called eprinomectin. Current tick control products are also included in comparisons.
These treatments are already available in the market, which could allow farmers to respond quickly if the results are successful.
One of the challenges in managing the disease is its similarity to anaplasmosis. Symptoms such as weight loss, anemia, and reduced milk production can make diagnosis difficult. However, this disease can affect all cattle, not just older animals.
The parasite damages red blood cells and can reduce reproduction and growth performance. In some severe cases, it can cause high death losses in infected herds.
The disease has now been found in several counties, and experts warn that its spread may continue due to cattle movement. Researchers are also studying whether other insects may transmit the parasite through blood contact.
Efforts are underway to educate producers and veterinarians through extension programs. These include training sessions, field events, and guidelines to reduce disease risks.
Experts believe this emerging threat could become one of the most impactful tick-borne diseases in US cattle production, highlighting the need for timely research and awareness.
Photo Credit: gettyimages-d-keine
Categories: National