Dr. Hartman,
I would consider biofilm intervention and keep going with antifungals like Nystatin and Biocidin and recheck arabinose again in 90 days.
Also, the high oxalates can take awhile to come down, and in some case more than 6 months, particularly if this child has had a documented kidney stone before. Are you doing high dose probiotics too? Are the parents controlling high oxalate foods?
The use of sodium biocarb could be worthwhile. Here is an interesting abstract from a Journal of Urology 2013 – http://www.ncbi.nlm.nih.gov/pubmed/23602798 on this topic of calcium stone formers. I am assuming this is oxalate and not urate stones since the oxalate was high on the OAT.
Also, was the glyceric or glycolic high?
Dr. Woeller