We are using maggot therapy on one of our patients with a terrible pressure ulcer.  
It's endlessly delightful to pretend to be ultra-scientific about dumping a bunch of creepy-crawlies into sores.  We use 4-5 maggots per square inch of wound.  The dead tissue can usually be removed by 1-3 "applications."  
The good news is it works, fantastically.  Our patient loves it, says it's not uncomfortable at all.  
It's working so well for him, in fact, that I got to spend a good part of my day was filling out forms to try to get Medicare to cover home maggot therapy. 
We'll see if it goes through.