I think you are right in not approaching this putting down anti E drugs. That might just bring out the daggers.
I am wondering since things like Vitamin B, and antibiotics can increase yeast/fungal issue if anti E meds can do this too. Leaky gut is also a hug issue with food sensitivities.
I can offer the sites that I began my search with:
http://www.stankurtz.com ( he might even be willing to help you since he recovered his child from autism by healing his gut)
http://www.danasview.net http://www.dogtorj.com (of course he remains a hero of mine since he began me on my nutritional research)
http://www.enzymestuff.com/digestion.htm http://www.health-truth.com/