Also cool how it disseminates through the brain:<p>"Researchers in Sweden report that the parasite fans out through the body by manipulating mobile cells that are part of the immune system."<p><a href="http://www.nytimes.com/2006/06/20/science/20toxo.html" rel="nofollow">http://www.nytimes.com/2006/06/20/science/20toxo.html</a>, see also <a href="http://blogs.discovermagazine.com/loom/2006/06/20/toxoplasma-on-the-brain/" rel="nofollow">http://blogs.discovermagazine.com/loom/2006/06/20/toxoplasma...</a><p>This is interesting because it's very hard to penetrate the blood-brain barrier.  One could imagine an engineered toxoplasma that delivers drugs to the brain via this route.