I don't really know much about infections and pregnancy, other in my infant loss grief group there have been a few couples who have had babies born still due to infections of some kind. My own mother had an infection with me which caused preterm birth, but (fortunately) I lived. I've never asked if she was told what kind of infection she had or how she got it. I hope someone else has some more info for you. Was it hard reading the autopsy? I think that would be very difficult.
Mama to Millie
born June 2010 @ 24 wks. gestation due to my severe PE and CHF
lived 25 days, loved and missed