Actualy, I've recently (well, a few months back) caught most of a show on the Discovery Channel that (in part) discussed Maggots and thier use in modern medicine.
Hate to burst anyone's bubble, but maggots (of the non-evil/magical type at least) only eat unhealthy/dead meat. I found this out from the show's explanation of how they're helpful in removing dead/diseased tissues without ever touching the 'good meat'. If I remember correctly the doctors still don't know how the little buggers manage that, seeing as they've basically only got one sense: Taste.
Me? I'd probably go with 'cut the limb off doc, that is not a viable option!' instead of allowing the disgusting little larve on/in me anywhere.
Hatchling Dragon