Yeah, unfortunately if the infection hasn't been treated early on it will take a larger effort to get to remission. What's good is your son is obviously quite high-functioning, and I think in those cases it can still require significant treatment but he is starting from a stronger baseline therefore may be able to better tolerate therapies.
My suggestion, and I merely say this because I've seen this pattern before... and I don't mean to unduly worry you either but I feel I should mention it... patients can be high-functioning but a future stressor can cause the infections to break out into more significant symptoms. So my view is it's a good idea to try and treat the infection as thoroughly as possible (could even look into herbal protocols as well) so that you can head-off any future issues.
Most army docs and mainstream medical professionals will discount this view of thinking, which is why I suggest looking into researching herbal protocols which are pretty easy to self-administer. Of course, that only goes if that strategy makes sense to your son and he wants to pursue those therapies!
Post Edited (sebreg) : 7/1/2018 10:32:02 AM (GMT-6)