debridement via maggot

some entomology and history for your edification:

...some civil war surgeons ultimately realized that maggots could have beneficial effects: they painlessly cleansed wounds by digesting and removing dead tissue without injuring healthy tissue. Confederate surgeon Joseph Jones, for example, reported that "a gangrenous wound which had been thoroughly cleaned by maggots healed more rapidly than if it had been left by itself." In recent times, physicians have rediscovered the ability of maggots to debride wounds, often more carefully than the best surgeon.

from Bollet Civil War Medicine: Challenges and Triumphs