USDA Detects First Case of New World Screwworm in South Texas The U.S. Department of Agriculture confirmed the first case of New World screwworm in South Texas since 2017. The parasite was found in a 3-week-old calf’s umbilical area, with no other detections reported yet. This comes as cases have recently appeared near the Texas border in Mexico, raising concerns about potential spread.

• A case of New World screwworm was detected in South Texas.
• This is the first U.S. detection of the parasite since 2017.
• The affected animal was a 3-week-old calf with larvae in its umbilical area.
• No further detections have been confirmed to date.
• Personnel and local partners have been activated by the USDA.
• Previous confirmed cases in Mexico were recently found near the Texas border.