The Department of Health and Human Services confirmed the first human case of a flesh-eating parasite in the U.S. Here's what you need to know about New World screwworm.

The patient had traveled to Central America, where an outbreak of myiasis, an infection by screwworm larvae, has been ravaging livestock.

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.