What you need to know about the flesh-eating screwworm in the U.S.

Key Takeaways:

• First confirmed New World screwworm case in Maryland
• Infection occurred after travel from Guatemala
• Patient has received successful treatment
• The parasite is considered a rare but serious health threat
• Based on East Bay Times coverage published August 25, 2025

Introduction

The confirmation of a New World screwworm infection in Maryland has created public concern about a flesh-eating parasite rarely seen in the United States. Officials report that the infected individual journeyed from Guatemala, where exposure likely occurred, and has since received medical attention.

Background on the New World Screwworm

This parasite, long known for its destructive capabilities, is referred to as a “flesh-eating” organism. Though uncommon in modern-day America, it remains a threat to both humans and animals in certain parts of the world. Its presence warrants close monitoring by health and wildlife authorities.

The Maryland Case

According to the information provided, this confirmed case in Maryland involved a patient who traveled from Guatemala before arriving in the United States. Upon detection of the parasite, immediate treatment measures were taken, illustrating the healthcare system’s readiness to respond to such incidents.

Response and Treatment

Healthcare workers moved quickly to treat the infection, preventing further complications. While details on the specific medical treatment are limited, the reported success offers reassurance that timely intervention can be effective against this parasite.

Looking Ahead

Though cases like this remain rare, the appearance of a New World screwworm infection highlights the importance of vigilance—particularly for travelers and health officials. Monitoring for unusual symptoms, especially in those who have journeyed from regions where the parasite is more common, is essential.