Background: Recent studies have described a high percentage of small intestinal bacterial overgrowth (SIBO) in patients with irritable bowel syndrome (IBS). However, the prevalence of SIBO has not been well established in other functional disorders.
Aim: To evaluate the prevalence of SIBO in patients with different functional gastrointestinal disorders (FGID).
Material And Methods: Patients with FGID completed a self-administered questionnaire providing information to diagnose functional disorders on the basis of Rome II criteria. SIBO was assessed using a standardized lactulose breath test. A basal value of breath hydrogen (H2) >20 ppm and/or two lectures of HZ values >20 ppm during the first 60 minutes were considered suggestive of SIBO.
Results: We studied 367 patients with a mean age of 50 years (87% females). Of these, 225 had IBS (45 constipation predominant, 121 diarrhea predominant and 59 alternating type), 33 had functional constipation, 83 had functional bloating and 26 had functional diarrhea. SIBO was found in 76% of patients with IBS, 73% of those with functional constipation, 69% of those with functional diarrhea and 68% of those with functional bloating.
Conclusions: This study confirms a high percentage of SIBO in patients with IBS and other FGID. The eradication of SIBO should be considered as a therapeutic tool in these patients.
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J Gastroenterol Hepatol
January 2025
Faculty of Medicine, Division of Gastroenterology, Department of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia.
Background: Gas production due to fermentation from fructose malabsorption (FM) or lactose malabsorption (LM) and small intestinal bacterial overgrowth (SIBO) contribute to the development of gastrointestinal symptoms in patients with irritable bowel syndrome (IBS). However, the impact of the carbohydrate malabsorption, unlike SIBO, is relatively unknown.
Methodology: A multicenter, prospective study of consecutive adults with IBS who underwent a hydrogen breath test (HBT) (glucose, 75 g; lactose, 25 g; or fructose, 25 g) was conducted.
EClinicalMedicine
February 2025
Faculty of Medicine, University of Queensland, Australia.
Background: Small Intestinal Bacterial Overgrowth (SIBO) has been implicated in the pathophysiology of chronic liver disease (CLD). We conducted a systematic review and meta-analysis to assess and compare the prevalence of SIBO among CLD patients (with and without with complications of end stage liver disease) and healthy controls.
Methods: Electronic databases were searched from inception up to July-2024 for case-control studies reporting SIBO in CLD.
J Inflamm Res
January 2025
Gastroenterology Department, Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China.
Background: Our study examines the relationship between gastroesophageal reflux disease (GERD) and small intestinal bacterial overgrowth (SIBO), focusing on the potential impact of acid-suppressive drugs. We also explore changes in gut microbiota and metabolism in patients with both conditions.
Methods: This study included patients from the Department of Gastroenterology, Beijing Shijitan Hospital, between February 2021 and November 2023.
Ann Agric Environ Med
September 2024
Higher School of Health Promotion, Kraków, Poland.
Front Nutr
December 2024
Department of Gastroenterology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.
Unlabelled: Small intestinal bacterial overgrowth (SIBO), characterized by alterations in both the type and quantity of bacteria in the small intestine, leads to impaired intestinal digestion and absorption that can cause a range of clinical symptoms. Recent studies have identified significant changes in the composition of the small intestinal microbiota and metabolomic profiles of patients with metabolic dysfunction-associated steatotic liver disease (MASLD). This study systematically reviewed and synthesized the available data to explore the association between SIBO and MASLD.
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