Toxoplasma gondii is a parasitic protozoan that is known to infect several organisms including humans.
This organism is responsible for causing the disease toxoplasmosis.
In the life cycle, of T.gondii the only known definitive hosts are the domestic cats and their relatives and the intermediate hosts include birds and rodents.
The disease can be spread from the cats to other organisms as the oocysts of the organisms of the organism are shed off in the feces of the cat.