well, that got your attention, now check this out…
Gawd bless them early explorers
So when did lager yeast come into use in Bavaria by the Monks? Some say early 1400s, which predates Columbus. So maybe the insect vector is the path, not wood from the New World. Will we ever know?
Hurricanes, trade winds, drift wood and ancient pre-historic sea born traders (which some dispute in spite of physical evidence) are also possibilities.