> Has it been clearly shown that they reproduce in bees? How is that shown?

Sorry Pete, I don't understand what "they" are.  Are you asking whether DWV
has been shown to reproduce in bees? If that's what you're asking, then
yes, as evidenced by it's presence in a number of bee tissues, as well as
negative strand virus RNA also being present in those tissues.

Right, how you show that a virus reproduces in bees. 
Of course, its presence does not show that. 

Peter L Borst

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