Theileria found in Nebraska cattle

By Scout Nelson

A serious livestock health concern has emerged as Theileria, a tick-borne parasite, has been detected in cattle across several counties in Nebraska. Authorities are urging livestock owners to remain alert and take preventive measures to protect their herds.

The disease is mainly spread by the Asian Longhorned Tick (ALHT), which is known to carry the parasite. Although this tick has not yet been confirmed in Nebraska, infected cattle brought into the state have tested positive for Theileria. The tick species has already been established in 26 states, raising concern about its possible spread.

Theileria is most transmitted through the bite of infected ticks. In some cases, it may also spread through contaminated equipment, needles, lice, or biting flies. This makes proper hygiene and equipment management very important in livestock care.

Infected cattle may show several symptoms. These include anemia, jaundice, reduced appetite, weakness, and difficulty in movement. In severe cases, the disease may even lead to death. Early detection plays a key role in reducing losses and managing the condition.

“The best method of prevention is tick control and good management practices for your herd including external parasite control” said State Veterinarian Dr. Roger Dudley. “If Theileria is suspected it should be reported to a veterinarian immediately.”

At present, there are no vaccines or approved treatments available for Theileria. Therefore, prevention remains the most effective strategy. Livestock owners are advised to work closely with veterinarians to choose suitable parasite control methods, especially during the summer when ticks are more active.

Regular inspection of cattle is also important. Special attention should be given to areas like ears, under the tail, flanks, and skin folds where ticks often attach.

Theileria is a reportable disease, and affected herds may qualify for financial support for losses. Cases should be reported by calling 402-471-2351. For more information, visit the website.

This alert highlights the importance of vigilance, timely reporting, and proper herd care in maintaining livestock health.

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