My sons girlfriend is now pregnant, and is living in a home where dogs have been pooping and peeing in the carpets for years, and are continuing to do so. The carpets are ruined and who knows what the floor underneath is like. I believe this is a health hazard especially as she is pregnant. Can this ongoing contamination cause problems in pregnancy? And what about health in general?

I believe it is from cats fecal matter and raw meat. Its called toxic plasmosa, I'm not sure of the spelling.
I was told if you get this virus during a certain trimester it can cause birth defects. I have a friend and her mother had this while pregnant with her, it affected her eyes.
A blood test during my pregnancy showed I had the anti bodies for this virus. It did not affect my child because I had the virus before the pregnancy.

I would think that it is just plain un healthy to live in a house that has been continuosly contaminated by such.
Overall, dogs do not pose any health risks for pregnant women. It is cat urine and feces that you should worry about. Although I believe there might be a small chance they could get salmonella. Are they cleaning up these messes right after they happen? I am sure she uses rubber gloves or some sort of protection while cleaning up the messes? What pre cautions are they taking as far as cleaning methods? Do they have any plans on removing the carpet? I would also be concerned about a crawling exploring baby who is going to be pretty much face down in this carpet for the first year of their life!
And I would be worried on how these untrained dogs are going to react to a new arrival!

I would think that it is just plain un healthy to live in a house that has been continuosly contaminated by such.
Overall, dogs do not pose any health risks for pregnant women. It is cat urine and feces that you should worry about. although I believe there might be a small chance they could get salmonella. Are they cleaning up these messes right after they happen? I am sure she uses rubber gloves or some sort of protection while cleaning up the messes? What pre cautions are they taking as far as cleaning methods? Do they have any plans on removing the carpet? I would also be concerned about a crawling exploring baby who is going to be pretty much face down in this carpet for the first year of their life!
And I would be worried on how these untrained dogs are going to react to a new arrival!

Got to spread the love, Aurora, but the sanitation issues raised are considerably more hazardous than just dog poop. If the carpets have been ruined by the dogs have the dishes ever been done? How many different kinds of bugs are living in the carpet pad? Do the fleas carry diptheria, dengue fever, or plague?

Now we can worry about jealous dogs.

Yes, I was quite concerned about the state of the carpet, but didn't know quite how to say "your son and his partner sound like dirty pigs, and if I were you I would slap your son in the head and tell him to clean his 'darn' house". But that's just me...

This is why I love floorboards.

When my mom had my little brother they replaced all the carpet and the underlay because of the dogs having 'accidents' on it (if you think puppy accidents are bad you should see a full grown great dane 'accident'!)

Aurora makes a good point about once the baby is born crawling around on that floor, and also about how to dogs will react to the new baby.