WebMd [1] and some other places [2] talk about it like it's a bacteria that your immune system fights off then you are safe from for the rest of your life. They don't seem to talk about any long term effects, and focus on just the risk the acute symptoms can have.

[1] http://www.webmd.com/food-recipes/food-poisoning/toxoplasmos... [2] http://www.pamf.org/serology/clinicianguide.html