NASHVILLE – The state veterinarian is announcing detection of Theileria orientalis in a herd of cattle in Middle Tennessee.
Theileria is a tickborne parasite that infects red and white blood cells and causes severe anemia in cattle. There is no vaccine to prevent the illness or effective treatment. Once an animal is infected, it is a carrier for life.
The affected herd in Maury County showed signs of illness and lethargy, and despite veterinary attention and antibiotic treatments, ultimately some animals died.
Theileria is not a threat to human health. Humans cannot become sick from contact with affected cattle, and consuming meat from affected cattle is safe provided the meat has been cooked to an appropriate temperature.
“The Asian longhorned tick is a common vector for this illness”
state veterinarian dr. samantha beaty
“The Asian longhorned tick is a common vector for this illness,” State Veterinarian Dr. Samantha Beaty said. “Although we have not yet confirmed the presence of ALT in Maury County, we know it’s already taken hold in several other Tennessee counties and will continue to spread. Cattle producers should take steps to protect their herds.”
Producers can minimize risk by keeping cattle out of wooded areas and keeping pastures mowed short, particularly pastures that border woods. Producers should also regularly inspect cattle for ticks, use varying types of acaricides (ear tags, pours, back rubbers, etc.), use a clean needle for every injection, and notify a veterinarian if cattle show signs of lethargy or illness.
The Tennessee Department of Agriculture’s Animal Health Division is responsible for promoting animal health in Tennessee. The state veterinarian’s office seeks to prevent the spread of disease through import and movement requirements, livestock traceability, disaster mitigation, and the services of the C.E. Kord Animal Health Diagnostic Laboratory. The division collaborates with other health-related stakeholders, academic institutions, and extension services to support One Health, an initiative to improve health for people and animals.
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