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Mexico Reopens Metapa Sterile‑Fly Plant to Fight Screwworm Resurgence

The binational effort aims to scale sterile‑fly releases to cut infections and restore cattle trade based on measurable declines from the program.

Overview

  • The Metapa facility in Chiapas was reinaugurated on Saturday and began staged production this week using biological material flown in from Panama to seed its colonies.
  • Operators plan a stepped ramp‑up that starts near 10 million sterile males per week and aims for about 100 million weekly by November to join Panama's output.
  • U.S. officials announced roughly USD 83.8–84 million in additional support and a planned Edinburg, Texas, plant is expected to add further production capacity.
  • U.S. restrictions on live Mexican cattle remain in force and officials say the border will reopen only after monitoring shows clear, program‑attributable declines in infections.
  • The sterile‑insect technique is a proven method that worked previously in the region but success now depends on sustained binational coordination, ramping production, epidemiological indicators, and stopping illegal cattle movements that could reintroduce the pest.