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Indigenous Microbiota

There is evidence to suggest that IBS may be associated with disruptions to the normal bacteria that make up the human gut, referred to as indigenous bacterial flora. In general, gut bacteria can be divided into species that have beneficial effects on the body, and harmful effects on the body, but gut bacteria largely coexist harmoniously within us without any obvious detrimental or beneficial effects. Several studies have suggested that disruption of this normal gut bacteria contributes to the onset and maintenance of IBS.

It is still unclear whether changes observed in the normal gut bacteria of IBS patients are the cause of IBS symptoms, or whether the altered gut bacteria is a result of some other underlying cause of IBS. Several studies have found the faecal bacteria of IBS patients to be different to that of healthy controls, suggesting that altered gut bacteria may be involved in this disorder. This has led to studies showing symptom improvement in some patients with IBS following treatment with probiotics (dietary supplements containing beneficial bacteria which promote good gut health).


If you are interested in other gastrointestinal-focused information and intervention websites developed and hosted at
Swinburne University of Technology,
please go to:

IBDclinic.org.au for individuals with Inflammatory Bowel Disease

Gastroparesisclinic.org for individuals with Gastroparesis


This website and its content is not intended or recommended as a substitute for medical advice, diagnosis or treatment. Always seek advice of your own physician or other qualified health care professional regarding any medical questions or conditions.

© 2014 Swinburne University of Technology | CRICOS number 00111D