Peter Borst quoted:

> As pointed out by Bailey et al. (1964), adult bees detect and remove
> larvae with sacbrood within a day or two after the larvae die, while
> the virus is still infectious.

Sometimes!  I have had one colony this year which had the most severe 
sacbrood I have ever seen - virtually every cell.  I left it to see what 
would happen.  Eventually the queen disappeared and I expected it to die 
out.  A couple of weeks later I found it down to 3-4 frames (it started the 
season as the strongest colony in the apiary), but the remaining workers had 
cleaned an polished all the cells - not a trace of disease.  I have now 
added some brood and a queen to see what happens next.
Best wishes

Peter Edwards
beekeepers at stratford-upon-avon.freeserve.co.uk
www.stratford-upon-avon.freeserve.co.uk/

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