What you can catch if you are in contact with cat feces is toxoplasmosis. I did some resarch and came up with this:
<<Toxoplasma gondii is a parasite that infects humans and animals. Millions of people in the United States, and the majority of people in some areas, are infected with this organism but have no symptoms of illness. When adults with an intact immune system are newly infected, they are usually asymptomatic. >>
Notice that is something you can catch if you are a gardener too in contact with earth, dirt spolied by cat feces... That's why in Portugal doctors recommend not eating strawberry during pregnancy since they are in contact with dirt...
<<Cats become infected with the parasite after eating rodents and other animals that carry forms of the parasite in their muscle. The cats become infected and pass the parasite's eggs in the stool. They shed the organism for only a few weeks, but the eggs can persist in the right environment for longer than a year. People become infected when they consume food or water contaminated with the egg. People may also become infected when they consume improperly cooked meats, usually pork, containing the organism.>>
Anyway,in Europe all pregnant woman are tested for toxoplamosis: if you are positive, it means that you already had it and probably are immune. (I think) If you are negative, then you have to take care no to catch during your pregnancy. And I am quite sure,that in US they do that also, if not, you might want to ask your doctor about it?
Here is the complete article that I found:Click