Necrotizing fasciitis (also called flesh-eating bacteria) is an infection caused by bacteria. It can destroy skin, fat, and the tissue covering the muscles within a very short time. Such a disease is very serious and quite rare. If it occurs on the genitals, it is called fournier gangrene.

According to the depressing statistics, 1 of 4 people with necrotizing fasciitis die from it, even being completely healthy before getting it. It's important to cover wounds with bandages, never delay first aid and often wash your hands to avoid getting such an infection.

More Info: en.wikipedia.org