> Spores of Bacillus larvae were  recovered from the rectal sac
 > contents of adult worker bees, Apis mellifera

 > Wilson later proved that recovered spores were viable when plated in
 >  an artificial medium, and caused American foulbrood disease when fed
 >  to susceptible honey bee larvae.

Thanks, but was that all you were able to find?

I was hoping for more.  None of that addresses my point that the
observations are binary whereas real world situations are analog.

The above does not say how many spores it took or what happens when the
digested spores are fed to non-susceptible larvae -- or how they compare to
fresh spores.


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