You would have better luck getting responses on the crohn's board here:https://www.healingwell.com/community/default.aspx?f=17
There are tests they can do to check how the inflectra is working. They can adjust the dosage or schedule to make it more effective - if there aren't antibodies. If he has antibodies, there are other options besides resection, but yes, it is a bit of moving from one medication to another.
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Give a man a fish and he will eat for a day; teach a man to fish and he will eat for a lifetime; give a man religion and he will die praying for a fish