Story perspectives

First U.S. Screwworm Case Sparks Livestock Crisis Alert

8/29/2025

Summary

Story summary

The first U.S. human case of New World screwworm was confirmed in Maryland on August 4, linked to El Salvador travel; the patient has recovered.
Mexico reported over 5,000 screwworm cases in livestock, a 53% increase, leading to $1.3 billion in export losses.
The USDA warns that uncontrolled screwworm could threaten $100 billion in U.S. livestock activity.
U.S. and Mexico are establishing sterile fly production facilities to produce 500 million sterile flies weekly.
Emergency veterinary drugs have been approved to prevent the parasite's spread, urging vigilance among livestock owners.

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Story summary

The first U.S. human case of New World screwworm was confirmed in Maryland on August 4, linked to El Salvador travel; the patient has recovered.
Mexico reported over 5,000 screwworm cases in livestock, a 53% increase, leading to $1.3 billion in export losses.
The USDA warns that uncontrolled screwworm could threaten $100 billion in U.S. livestock activity.
U.S. and Mexico are establishing sterile fly production facilities to produce 500 million sterile flies weekly.
Emergency veterinary drugs have been approved to prevent the parasite's spread, urging vigilance among livestock owners.