Story perspectives

Maryland Reports New World Screwworm Case; Livestock at Risk

8/31/2025

Summary

Story summary

A human case of New World screwworm was confirmed in Maryland on August 4, 2025, linked to travel in El Salvador.
The CDC and Maryland officials assessed a low public health risk, with no transmission reported.
Mexico experienced a 53% rise in screwworm cases, raising concerns for U.S. livestock.
The USDA has initiated surveillance and suspended livestock imports from Mexico to mitigate spread.
The cattle industry estimates a potential economic impact of $1.8 billion for Texas.

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Story summary

A human case of New World screwworm was confirmed in Maryland on August 4, 2025, linked to travel in El Salvador.
The CDC and Maryland officials assessed a low public health risk, with no transmission reported.
Mexico experienced a 53% rise in screwworm cases, raising concerns for U.S. livestock.
The USDA has initiated surveillance and suspended livestock imports from Mexico to mitigate spread.
The cattle industry estimates a potential economic impact of $1.8 billion for Texas.