Toxoplasmosis (Toxoplasma gondii):This zoonosis is spread to humans by ingestion of undercooked meat or oocysts from cat feces. Exposure to this parasite is common, and can lead to serious fetal abnormalities during pregnancy or fatal encephalitis in immune compromised individuals. Treatment options are limited, and need to be given lifelong in immune compromised persons. The potential for introduction of this pathogen into the food supply has resulted in its listing as a Biodefense agent. There is no vaccine for toxoplasmosis