Never done one before but I did a full disease inspection last week, shaking bees off all brood frames and failed to find anything that concerned me (with my limited experience, true). But then the colonies are all big and thriving at the moment. Including the 2 swarms that arrived after the initial NBU notification which will be 6 weeks old.
(Couldn't even find any chalkbrood which has been an issue since I started. ?)
Some pollen cells can look suspicious.
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The apiary which was the original source of the outbreak has had problems. One shook swarmed colony swarmed/absconded? and both went queenless. May have to help out with a frame of eggs.
Thinking I should do another disease inspection later in the year and again next spring. Then relax again.
. . .. . Ben