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Beef Cattle Disease Confirmed in Iowa for the First Time

By Grant Dewell

The Iowa Department of Agriculture and Land Stewardship has confirmed a case of Theileriosis, caused by Theileria orientalis Ikeda, in a herd of cattle in southeast Iowa for the first time.

Theileria is a protozoan parasite that infects red and white blood cells, leading to anemia and, in some cases, death. The parasite is carried by Asian Longhorned Ticks (ALHT), which have recently been identified in Iowa for the first time. Although the tick will be active all summer, it is common to see a surge of infestations when cattle are first introduced into a new pasture. The presence of a preferred host generates a surge in new ticks, as females will begin to lay thousands of eggs.

Cattle producers should closely observe cattle on pasture regularly for signs of tick infestation (especially in Southern Iowa; although, expect the tick to spread north this summer), particularly since many cows have been turned out to pasture recently.

Source : iastate.edu

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