I actually had my camera for once, so I thought I'd run this by you guys. I noticed a frame with dead brood like this a week ago, and thought it was chilled brood. Now in the same colony, I've seen a couple more frames like this. It only seems to be open brood (larvae) that are discolored, from brown to black; no affected capped cells that I see. I tried the ol' twig test to see if the dead brood was "ropey", but it did not seem to be. Oh, and it smelled foul. I was under the impression that EFB was mostly a bacterial stress disease that a colony can take care of on it's own when there's a nectar flow on. Well, it's starting here, but this hive seems to be getting worse. What to do? I did remove this frame (though there are a couple more affected frames left in the hive), and will cut a comb and brood sample to send to Beltsville, just to see what they say. This has been a very rough year for my colonies, with not a lot coming out of the winter, but I've only noticed symptoms like these in one or two survivors (and nothing like this in the deadouts). -Dan ps- the kicker is, this was to be my cell builder colony when rearing queens this year. I guess that's out.