"The risk to public health in the United States from this introduction is very low," said HHS spokesperson Andrew Nixon.

The first case of a New World Screwworm infestation in a human was confirmed in the U.S., according to the Department of Health and Human Services.

Travel-associated New World Screwworm was detected in a patient who returned to the U.S. from El Salvador, and was confirmed by the Centers for Disease Control and Prevention on Aug. 4, HHS spokesperson Andrew Nixon said in a statement to CBS News on Monday.

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