MODULATING THE HOST. “The success of Toxoplasma as a widespread pathogen is due to the ease in which it can be transmitted between intermediate hosts. The ability of the parasite to replicate within a host cell, evade immune responses, and undergo bradyzoite development requires that the parasite effectively modulates its host.”
http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0463.2009.02453.x/full