For decades, the U.S. and Mexico worked together through the COMEXA partnership, and by the early 1990s, had successfully eradicated screwworms from both countries by producing sterile flies. But facing budget pressures, they ended the partnership in 2012 and closed an important facility in Chiapas, Mexico. Screwworms returned in 2023 and spread to Texas by June 2026. Read the full Texas Monthly article to find out more about what went wrong — and what it will take to fix it.
