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 New World screwworm is a type of fly that can cause widespread devastation to livestock, wildlife and pets.

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.