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World J Gastroenterol. 2009 Jun 7;15(21):2628-31.

Small intestine bacterial overgrowth and irritable bowel syndrome-related symptoms: experience with Rifaximin.

Author information

1
Operative Unit of Gastroenterology and Hepatology, Di.Bi.M.I.S, Piazza delle Cliniche 2, Palermo 90127, Italy. peralta.sergio@yahoo.it

Abstract

AIM:

To estimate the prevalence of small intestinal bacterial overgrowth (SIBO) in our geographical area (Western Sicily, Italy) by means of an observational study, and to gather information on the use of locally active, non-absorbable antibiotics for treatment of SIBO.

METHODS:

Our survey included 115 patients fulfilling the Rome II criteria for diagnosis of irritable bowel syndrome (IBS); a total of 97 patients accepted to perform a breath test with lactulose (BTLact), and those who had a positive test, received Rifaximin (Normix, Alfa Wassermann) 1200 mg/d for 7 d; 3 wk after the end of treatment, the BTLact was repeated.

RESULTS:

Based on the BTLact results, SIBO was present in about 56% of IBS patients, and it was responsible for some IBS-related symptoms, such as abdominal bloating and discomfort, and diarrhoea. 1-wk treatment with Rifaximin turned the BTLact to negative in about 50% of patients and significantly reduced the symptoms, especially in those patients with an alternated constipation/diarrhoea-variant IBS.

CONCLUSION:

SIBO should be always suspected in patients with IBS, and a differential diagnosis is done by means of a "breath test". Rifaximin may represent a valid approach to the treatment of SIBO.

PMID:
19496193
PMCID:
PMC2691494
DOI:
10.3748/wjg.15.2628
[Indexed for MEDLINE]
Free PMC Article

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