Alert: Screwworm Confirmed in the United States
| June 4, 2026
On June 3, 2026, the U.S. Department of Agriculture confirmed New World Screwworm in the umbilical area of a calf in Zavala County, Texas. This expansion into the United States is alarming and US Equestrian wants to make sure you know about the potential risks of this parasitic fly to horses. What is the risk of screwworm to horses? Screwworm myiasis (infestation) is caused by fly larvae (maggots) that feed on living tissue of any warmblooded animal. Horses, cattle, wildlife, pets, and...