There are some parasites that have the ability to control their hosts. It's basic knowledge among biologists but not much is known as to how the parasites do it. Studying these parasites specifically might reveal some clues to as to how the powers of the Las Plagas work. And perhaps provide more insight on the victimes of the Las Plagas, the Los Ganados.

Here is a list of some of the parasites that have the ability to manipulate the behavioral patterns of their host. Dicrocoelium = Once the larvae of this parasite migrates to the ant's esophagus, it alters the behavior of the ant.