Cleaning a cat's litter box can get you Toxoplasmosis if the cat is infected. While pregnant, it can cause your baby to be born with cerebral palsy, seizures, and mental retardation.
Acute infections in pregnant women can be transmitted to the fetus and cause severe illness (e.g., mental retardation, blindness, and epilepsy). An estimated 400-4,000 cases of congenital toxoplasmosis occur each year in the United States.