<<Disclaimer: Verify this information before applying it to your situation.>> As far as we know CD is not an infectious disease. I have had only one husband/wife pair with celiac disease and have never seen unrelated adopted children both get it. If anyone has experience of that finding please e-mail me post it. There is certainly conflicting evidence on whether a infection triggers the presentation( not necessarily the start of the disease) in a genetically predisposed person. Not all of the cause is genetic in that 3 out 4 identiacl twins will have the diseae but not all pairs. Joe Murray