Blog by Professor Frédéric Barbut, medical microbiologist, Assistance Publique-Hôpitaux de Paris, hôpital Saint-Antoine, Paris
Did you know that we all carry many millions of bacteria on our hands? Anything between 100 to 1,000,000 per square centimetre of skin! But before you start to panic, rest assured that many of these bacteria occur naturally, along with fungi and viruses, and are normally harmless (or ‘not pathogenic’ to use the scientific term). They are known as ‘resident microflora’ and can actually be beneficial in protecting us from infection. Common strains include Staphylococcus and Micrococcus.