C.J.
I never had this issue, but it really got me curious. Take a look at these two sites.
The second one has a great list of references. From the looks of it, it rarely spreadst to the baby and is mostly an issue if it continues into the third trimester. . .
http://www.babycenter.com/400_e-coli-infection_###-###-##...
http://www.otispregnancy.org/files/ecoli.pdf