For example, it would be possible to see a cluster of Pseudomonas organisms on this surface or a cluster of Staphylococci on that. We could then try to eliminate them or take avoiding action. The fact is we cannot see them, but we still have to take care to prevent their entry into the body or assist the immune system to kill them if they do enter. A proportion of HAIs result from poor handwashing techniques. The existence of pathogenic organisms means that elaborate and expensive procedures have to be used for prevention and treatment of infection.
Skin is the perfect breeding ground for rampaging superbugs.