Parasitism is a very important phenomenon in nature: depending on the broadness of the definition, up to 50% of all known species may be considered as parasites. In some species, host organisms display a behavior that is different from the behavior of uninfected individuals. Such differences have been observed in Three-spined Sticklebacks infected by the parasite Glugea anomala, but so far, whether such differences show consistency across time and contexts, in other words, whether they are changes of personality, has not been studied. 

In my work, I have studied the Glugea anomala/Three-spined Stickleback parasite/host system to assess the relationship between parasite infection and personality.