There seems to be so much confusion in this area. My consultant had done a lot of research - it’s her special field. She administered the breath test, then used four different antibiotics on a rolling programme over a period of four months - two weeks on two weeks off. They weren’t a diagnostic tool as far as I understand it. When they didn’t work she moved me onto the FODMAP diet. Apparently, according to the research statistics, a considerable proportion of SIBO sufferer will not benefit from antibiotics anyway. There is only one definitive test at the moment, it seems.