DBwithUC said...
Both of you are thinking wrong. Whether the inhereted susceptibility comes from genes or bacteria, the point is your mom had them, you have UC and your siblings don't. That is par for the course in anything that is not majority inherited.
Saying "I have UC and my siblings don't" is as meaningless for bacteria transmission as it is for gene transmission. Your siblings not having UC does not disprove any known/proven gene associations, nor does it disprove the possibility that human mothers pass a similar bacteria to what the mouse mothers pass.
I said, "pretty sure I would have gotten it from her whether she breastfed me or not"