<<Disclaimer: Verify this information before applying it to your situation.>> After reading the expert posting archives, I have questions about selective IgA deficiency. Has anyone on this list had experience with this? My serum antibody tests were very low although I sure have enough celiac symptoms and a historically good response to a g-f diet (yes, one set of the tests was done after a lengthy gluten challenge). I'm trying to get my knowlege base in order before I try one last time to get a clear diagnosis with the serum antibody tests and a biopsy. I have an extensive history of recurrent urinary tract infections, going back to early childhood (currently I'm 39) and what little information I can find indicates there may be a connection between those and IgA deficiency? I'm starting to feel a little foolish after years of insisting on knowing why my gut doesn't work, so kind words on turning every stone would be great too. Thanks in advance, Laurie