A Maryland resident who traveled to El Salvador has been diagnosed with New World screwworm — the first reported U.S. case tied to travel to a country with a current outbreak.

The Centers for Disease Control and Prevention confirmed the diagnosis on Aug. 4. Federal health officials acknowledged the infection in an emailed statement Monday.

The person has recovered, and investigators found no trfansmission to any other people or animals, Maryland health officials said.

The CDC investigated the case in coordination with Maryland's health department.

Here's what to know.

What is New World screwworm?

New World screwworm (NWS) is a fly that lays its eggs in open wounds and body openings. The parasite is typically found in South America and the Caribbean.

It is rare in humans but has

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