Experts break down how concerned you should be about human cases of infestations — which the CDC describes as "very painful."

Infestations are ‘very painful’, CDC warns

Parasitic flies have been found in the United States, following an outbreak of screwworm in Central America last year.

HHS told Reuters patient had returned from El Salvador but beef industry said person had traveled from Guatemala

The U.S. confirmed its first human diagnosis of the flesh-eating bacteria screwworm since 1982 after its known eradication nearly 50 years ago and animal testing currently…

New World screwworm myiasis was found in a patient who returned to the US from El Salvador, authorities say.

Experts break down how concerned you should be about human cases of infestations — which the CDC describes as "very painful."

The parasites mainly infest cattle but there have also been dozens of cases involving people.