Hi all
I assume that anyone who is interested in this has already gone to the archives. If not, this idea was floated 5 years ago by Barry Donovan:
Perhaps the advent of acarine and varroa in North America has greatly
increased the distribution and rate of spread of prions infecting the
brains of bees, causing memory loss and so failure of foragers to return
to hives, and so resulting in the widespread collapse of many more
colonies than previously? -- BEE-L Mon, 7 Jul 2008
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