Yes, cats carry the toxoplasmosis bacteria in their faeces.
If you have had the disease (a bllod test can tell) then you are immune but if your first blood test is after getting pregnant they can't tell if you had it before you got preg.
If you get toxoplasmosis when preg it can lead to blindness of the child, and other birth defects.
However many wome continue to look after their cats, just remember to always wear thick rubber gloves when doing the cat potty, wash your hands well with anti-bacterial soap afterwards and always wash your hands after touching the cat(s) before preparing food or eating or putting your hands to your face.
See cats (horrible critters lol) lick themselves and spread the bacteria over themselves (some cats are also immune and don't have it anyway) but after they have been in their litter box they also walk all over everything including kitchen surfaces.
So if docs had their way we would all be preceeded by and anti-bacterial mist lol