New World screwworm outbreak threatens Texas cattle industry

Texas public health officials are closely monitoring a resurgence of the New World screwworm (NWS) parasite after nine livestock cases were confirmed in the state and neighboring New Mexico. County Public Information Officer Cary Zayas said there are "no immediate concerns" for humans, but officials are coordinating with animal‑health partners to detect any potential infections and to educate clinicians.

The United States Department of Agriculture has declared a disaster declaration for Travis County and is working with Texas emergency‑management agencies to implement animal‑movement controls and support affected landowners. California has tightened entry restrictions, requiring veterinary certification for animals coming from affected areas. A sterile‑insect production facility opened in Edinburg, Texas, aims to suppress the fly population using the sterile‑male technique that previously eradicated the pest in the 1960s. Officials warn the outbreak could disrupt cattle transport and pressure beef prices as the parasite spreads northward from Mexico.

Human infection remains rare; the CDC notes transmission requires the fly to lay eggs directly in an open wound. Authorities emphasize wound care and early reporting as the primary defenses against the flesh‑eating larvae.