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New World Screwworm Returns to U.S., Partners Build County Risk Dashboard

Mapping county-level risk gives officials faster warning to protect livestock, wildlife, human health.

Overview

  • Confirmed detections of New World screwworm have been reported in Texas and New Mexico, prompting a coordinated detection and control response.
  • County of San Diego HHSA and UC San Diego built a partner-only dashboard that combines confirmed cases, environmental suitability models, and media reports to estimate county-by-county risk.
  • Officials include media signals in the dashboard because lab confirmation can take days or weeks, and early alerts speed local surveillance and veterinary checks.
  • The USDA has revived the sterile insect technique and imposed pesticides and animal-movement quarantines, and it is testing a genetically modified all-male strain that is seeking EPA approval.
  • The response is run as a one-health, multi-agency effort through Resilient Shield and Insight Net, and it aims to limit economic damage to livestock while improving early-warning tools for future pest threats.