I have had limited experience with AFB, but in those instances where it has occurred I have seen little spreading of the disease, possibly because I pick it up soon and either treat or destroy the hive.  It is also
curious that I have only had single hives affected, even though there are hives close by they do not seem to be affected.  I think it is a combination of genetic susceptibility; severity of exposure, and the general health of the colony to start with.

I only wish I could pick up on the disease sooner, so I can skip the step of destroying wooden ware.  I can only say that my reaction to having lost a few hives to it is that I am more rigorous about rotating out old brood comb, and doing a thorough brood nest inspection in the Spring, plus responding as soon as practicable when a hive seems to in distress w/o apparent cause.
/C.Crowell - NJ

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
-- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and  other info ---
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::