UK scientists suggest that a type of friendly bacteria found in soil may affect the brain in a similar way to antidepressants.

Their findings are published in the early online edition of the journal Neuroscience.

Researchers from Bristol University and University College London discovered using laboratory mice, that a “friendly” bacteria commonly found in soil activated brain cells to produce the brain chemical serotonin and altered the mice’s behaviour in a similar way to antidepressants.