Table 1

 Species of bacteria in subjects with small intestinal bacterial overgrowth

SubjectBefore treatmentAfter treatmentResponder
IBS-A, alternating-type irritable bowel syndrome; IBS-C, constipation-predominant IBS; IBS-D, diarrhoea-predominant IBS.
The amounts and different types of bacteria (cfu/ml) found in the cultures of the patients with small intestinal bacterial overgrowth before and after antibiotic treatment, as well as the effect of treatment (responder = ⩾25% symptom improvement). — no bacteria.
IBS-C5×105Escherichia coliNo
IBS-A106 mixed G-flora106KlebsiellaNo
105Enterococci106Enterococci
5×105Clostridium5×103Staphylococcus aureus
IBS-C106 mixed G-flora5×105SerratiaNo
105Enterococci
IBS-D5×105EnterobacterYes
105Staphylococcus aureus
IBS-D>107Klebsiella5×105KlebsiellaNo
IBS-A107E coli103E coliYes
IBS-C>107Enterococci106KlebsiellaYes
5×105 mixed G-flora