How can babies contract toxoplasmosis?

Pre/postnatal?!?! The organism of toxo is acquired by ingestion of infected raw or undercooked meat or inhaled eggs that aerosolize from cat feces. Maternal infection during pregnancy may or may not pass on to the baby. The damage of the infection to the fetus varies. Women contemplating or in pregnancy are encouraged to avoid contact with a cat literbox for the duration of the pregnancy.
Prenatally. Toxoplasmosis is a parasite that infested the mother that handles the cats or dogs feces and when she gets pregnant, the baby acquires it and it may cause congenital deformities.