The U.S. Department of Agriculture (USDA) announced on June 3 that a 3-week-old calf in Zavala County, Texas, near the Mexican border, had been infected by the New World screwworm.
Two days later, a second case of the flesh-eating New World screwworm was detected in a 1-month-old calf in the same county, according to the department, just 5.6 miles away from the location of the first confirmed case.
