A rare case of travel-related New World screwworm was identified in Maryland in a patient who traveled from El Salvador, a spokesman from the US Department of Health and Human Services said.

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

The US has confirmed a case of the flesh-eating parasite New World screwworm in a person in Maryland, who had traveled from Guatemala and has received treatment for the infection.