That is an interesting thought of stripping the comb and foundation from frames and then thoroughly scorching and run them foundationless. It would be a cheap way to test for reoccurrence with out risking the price of all new frames and foundation. If they draw them a bit screwy, but healthy, they can be replaced later. Thanks for that idea.
Somewhere in my reading I came across some info on how difficult it is to culture melissococcus plutons bacteria in the lab. Apparently the necessary conditions are highly specific. Some particular mineral salt levels being one; perhaps potassium. That is hard to resolve with how easy it seems in some conditions to re establish itself.