I don't know a lot about this but there are diseases that can pass between the two species. They are called Zoonotic. Strep is one of them. The dog can be a carrier and pass it on to other family members.
On each page it is about half way down...
http://www.vin.com/VINDBPub/SearchPB...00/PR00108.htm http://www.healthypet.com/library_view.aspx?ID=61&sid=1 http://www.druginfonet.com/index.php...rep_Throat.htm
I have no idea how often this happens but better safe than sorry. No kisses until she is better.