The first human screwworm case in the U.S. has been traced to a person in Maryland who traveled from Guatemala.

A human case of a flesh-eating parasite known as New World screwworm has been confirmed in a Maryland resident, the first in the United States in years, according to U.S. and state health officials.

First human case of a deadly flesh-eating parasite detected in US. Here's what to know about new world screwworm, what it looks like and symptoms.