Just cleaned up one of my three hives that did not make it through winter (the two others did, thankfully).
There was quite a bit of brown spotting on top of the frames of the top box of the dead hive, I cleaned it all off, but some accounts I have been reading seem to suggest that this sort of deposit means dysentery....which I have always assumed is an actual adverse condition....as opposed to just being a bunch of bee poop that was done because it was too cold for the bees to go out (which it certainly is here all winter until now) .
I am 99% sure the dead hive was due to low numbers after fall robbing, and not due to any disease. I am just concerned about re-using the frames, which are in good shape with comb and some honey. Poop is normal and presumably no big deal. Dysentery has to involve some adverse digestive condition or infection, yes? Is there any reason to suspect dysentery in this case? This is my first overwintering experience so I am not sure how much poop/spotting it is normal to find in the hive in spring.