> I think my original point is missed here. I won't belabor it but will make just one more run at it. North American bees' recovery from tracheal mites cannot in any way be compared to the infestation by varroa.

I agree. And I will repeat: the disappearance of a pest or parasite does not therefore prove that the host became "resistant" to it. Just as likely the pest died back for reasons unrelated to breeding, selection, or whatever. Try to keep correlation and causation straight here.

Pete

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