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Editor's take: The idea of cleaning human wounds with live maggots sounds like the sort of medieval medicine that should have died out somewhere around the invention of soap. But one day, you could be thanking a fly's larvae for saving a limb from amputation.

The US Food and Drug Administration has cleared Medifly Maggots, a prescription wound-care product from Singapore-based Cuprina, for use in maggot debridement therapy.

The product uses sterile, medical-grade larvae of Lucilia cuprina, better known as the Australian sheep blowfly, to remove dead or infected tissue from wounds that refuse to heal.