Federal health officials confirmed the first New World screwworm case in New Mexico on June 8, detected in a dog in Lea County. The parasite, which causes tissue damage in living animals, has now been found in five cases across two states in six days — three in cattle in Texas and one in a dog. This marks the first screwworm detection in a companion animal since the parasite re-emerged in the U.S., prompting USDA to expand inspections and raising concerns about potential spread to livestock herds which could impact beef supply and prices.