shroom you mentioned the scoundrel heres 2 links i found about it
as people are interacting and interbreeding creating a more diverse world race the same could be true for parasites. this may explain why more and more people are experiencing encounters with new parisites that the western world doesnt know about, the borders are wide open,and so western medicine should open their eyes amd minds to what is happening in the world, not just small town main street. one thousand years ago we were little islands of people evolving in seclusion ,we now interact globally so i would think it possible that parisites are doing the same thing , and in time it may get worse before the medical comunity wakes up to it.