You need to do an elimination diet, SCD diet, and eliminate all grains temporarily.
Curing this with antibiotics would only be a temporary solution, and antibiotics in general are not a good strategy for dealing with long term infections.
Because, some of my experience would suggest that it may be exacerbated by inflammation somewhat, but the primary cause is a persistent reservoir of bacteria. This could be a biofilm or otherwise dormant bacteria as described in the article. Actually, the latter is much more plausible as and, in all the time I have been dealing with this, no physician has ever mentioned that bacteria even have such a dormant state.