Assuming that the point of entry for the T mites had been in the south,
that pathogens go through the initial contact, explosion, and a stasis of
equilibrium pattern, and finally that the bees in the south have gone
through that process longer than the ones in the north-—could it be
possible that the bees in the south have learned to *put up with* T mites
better than the ones in the north?  Just a thought after reading our late
debate.

Yoon