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Updated: May 8, 2026
08:33
Quantitative Polymerase Chain Reaction-based Analyses of Murine Intestinal Microbiota After Oral Antibiotic Treatment
Published on: November 17, 2018
Meta-analysis: antibiotic therapy for small intestinal bacterial overgrowth
1Department of Medicine, University of California, San Francisco, CA, USA.
Alimentary Pharmacology & Therapeutics
|September 6, 2013
Summary
Antibiotics effectively normalize breath tests for small intestinal bacterial overgrowth (SIBO) compared to placebo. Breath test normalization may correlate with improved clinical response in SIBO patients.
Area of Science:
- Gastroenterology
- Microbiology
Background:
- Small intestinal bacterial overgrowth (SIBO) is a clinically significant condition often underdiagnosed.
- Optimal treatment strategies for SIBO remain uncertain.
Purpose of the Study:
- To systematically review and meta-analyze the clinical effectiveness of antibiotic therapies for symptomatic SIBO patients.
- To compare different antibiotics, dosages, and antibiotics versus placebo.
Main Methods:
- Systematic review and meta-analysis of clinical trials identified through four databases.
- Primary outcome: post-treatment breath test normalization.
- Secondary outcome: post-treatment clinical response assessment.
Main Results:
- Ten studies met inclusion criteria; Rifaximin was most studied.
- Antibiotics showed a 49.5% breath test normalization rate.
- Antibiotics were significantly more effective than placebo (51.1% vs. 9.8% normalization).
Conclusions:
- Antibiotics demonstrate superior efficacy over placebo for normalizing breath tests in SIBO.
- Breath test normalization appears linked to clinical improvement.
- Further high-quality trials are needed due to study limitations.
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