By Andi Anderson
For the first time, the Iowa Department of Agriculture and Land Stewardship has confirmed a case of Theileriosis in a herd of cattle located in southeast Iowa.
The disease is caused by Theileria orientalis Ikeda, a blood parasite transmitted by the Asian Longhorned Tick (ALHT).
Theileria infects red and white blood cells, which can lead to anemia, weakness, and death in severe cases. The Asian Longhorned Tick has recently been identified in Iowa and is expected to spread further north this summer.
Cattle turned out to pasture may trigger a rapid increase in tick populations, as females lay thousands of eggs when a host is present.
Cattle producers are urged to regularly check their herds, especially in southern Iowa, for signs of tick infestations and symptoms such as:
- Lethargy
- Anemia
- Breathing difficulty
- Jaundice
- Swelling (ventral edema)
- Abortion in cows
Young cattle may show more severe symptoms than adult cows or bulls. Since signs are similar to anaplasmosis, testing is needed to confirm diagnosis.
Veterinarians should be contacted immediately if illness is suspected. Samples can be sent to the Iowa State University Veterinary Diagnostic Lab for confirmation.
To control ticks effectively, experts recommend more than insecticide ear tags. Farmers should consider backrubbers, pour-ons, or pyrethroid products labeled for tick control. If infestation increases, an avermectin-based pour-on may offer better results.
Although Theileriosis affects cattle and other animals, it does not pose a risk to humans. Early action is key to preventing disease spread and protecting livestock this summer.
Photo Credit:istock-123ducu
Categories: Iowa, Livestock, Beef Cattle