Those who like to put things in order think that it is cleanliness that gives them a blissful state of comfort. And dust and dirt, on the contrary, contribute to despondency.
But this is not entirely true, according to British scientists from the Research Center for Neuroendocrinology at the University of Bristol. They studied a bacterium called Mycrobacterium vaccae, which is present in house dust. Once in our respiratory tract, this bacterium activates the nerve cells involved in the synthesis of serotonin. And with a deficiency of this hormone, we are especially prone to stress, bad mood and depression. In a word, scientists urge us not to strive for absolute sterility: a bacterium living in dust keeps our immune system in shape.