Varroa destructor is the "parasite" referred to here. It is endemic globally, bar a few specific island nations (eg Australia) and is present in essentially all colonies to some extent. The only way to have a hive that does not have varroa destructor present is through distinctly un-permaculture practices - specifically treating colonies with a variety of different insecticides (eg oxalic acid vapour) to kill the mites. Various beekeepers worldwide - myself included - are breeding for bees that are resistant, or tolerant, to varroa, but even the very best of these colonies will always have varroa present to some extent.
On top of that, treating for mites interferes with the evolutionary processes that are necessary for bees to evolve the resistance mechanisms to survive varroa - unfit bees survive instead of dying, and pass on their unfit genes to subsequent generations. So not only are these treatments specifically not very "permie" they also undermine the wider genepool - it is trading off short term honey profits, at the expense of the overall genetic fitness of the species.
Ethical/permaculture beekeeping is a huge topic, and I don't really see how this BB as written aligns with that.
Moderator, Treatment Free Beekeepers group on Facebook.
Screaming fools! It's nothing more than a tiny ad: