Insects and Medicine a long and relatively well documented history. Some feed on living tissue - have to be a little careful in your taxonomic selections.
Eggs are surface sterilized and inoculated onto food.
2 day old larvae then inoculated into wounds. Larvae flushed out with saline in 3 or 4 days and more young larvae added as necessary. Later discovered that NOT ONLY did the feeding of the larvae remove dead tissue, but also that they secreted an antibiotic which helped control pus-forming bacteria. Glucose Oxidase which liberates H2O2 - a strong antibacterial chemical. Dried beetles contain as much as 0.4 to 1 percent cantharidin.