U.S. Confirms Second Texas Screwworm Case as Canada Limits Livestock Imports

The U.S. Department of Agriculture has confirmed a second case of New World screwworm in Texas, raising fresh concern for livestock producers in the region. The latest case was found in a onemonthold calf in Zavala County, near the first detection announced earlier this month. New World screwworm is a parasitic fly whose larvae feed on the living tissue of warmblooded animals. It can cause severe wounds and, if untreated, may be fatal. The pest can affect cattle, wildlife, pets, and in rare cases humans. In response, the Canadian Food Inspection Agency said it will temporarily restrict livestock imports from affected areas of the U.S., including horses. Animals that were in Texas within 21 days before crossing the border will not be allowed entry into Canada. U.S. officials said the case was found inside an existing control zone and that the food supply remains safe.