Stan
Goes on to make exactly your point about comb transfer being main vector.

Reply:
Interesting this being said. For I would see it as a positive management manipulation, like exposing young children in too steril an environment to a sand/dirt box to get sublethal dosages of pathogens to in a way keep them healthier. 
 
So relate this more to inter transfer of commercial extracting combs/wets between hives, yards, or simply drawn out combs with empty frames or pollen even. Does it give colonies so introduced good or bad vectors of pathogens? For if never exposed, how can one get/stay healthy??? Also, one more observation that needs noting: How does it change relative to cell size?...........have you looked? Noted?......:>)
 
Dee A. Lusby




      

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