Bill said:  CCD may be a behavioral characteristic of the bee and not  a 
single pathogen.
 
That's a possability.  Pathogen/Parasite specialist working with many  
different animals have noted that at some threshold the disease/pest may induce  a 
behavioral response in the host.  Suggestions are that the host may try  to 
purge the problem (e.g., the so called lemming effect - I understand they may  
not actually plunge over the cliff) or this may facilitate dispersion (get the  
host to leave the population and 'spread' /vector it.
 
Jerry



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