I was not tested for SIBO until about a year after surgery when I changed to a new GI. The old GI never mentioned the possibility. I suffered a lot not only due to the nature of the surgery but then the SIBO. I tested positive and was given 3 separate month long trials of Xifaxan but it always returned after a few weeks. Then my doctor explained why the wide open anastomosis with no IV was unable to keep bacteria from backing up into the small intestine. He decided to put me on it indefinitely 2x day. I still had some problems, although was better. He bumped the Xifaxan up to 3 a day and it did the trick. I'm not sure every GI would be open to this but it's changed the quality of my life so much. Still have challenges but manage much better. The key is finding a great, open minded GI. My surgery was 31 months ago.