A team of scientists led by Premysl Bercik, Associate Professor of Medicine at McMaster’s Michael G. DeGroote School of Medicine, carried out two sets of experiments with mice with the goal of studying the effect of gut microbiota on behaviour in an established model of anxiety and depression.

Results published in the October issue of mBIO magazine showed an imbalance in the ratio of the two largest groups of microorganisms in the human gut (Firmicutes and Bacteroidetes) in favour of Bacteriodetes, while the overall bacterial load and diversity was similar between patients and controls.

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