VOLKER STEGER / SCIENCE PHOTO LIBRARY VOLKER STEGER / SCIENCE PHOTO LIBRARY
Dirty scouring pad. Coloured scanning electron micrograph (SEM) of a dirty scouring pad. Particles of food (green) trapped in the pad's fibres (yellow) provide an excellent breeding ground for bacteria. Cleaning utensils such as this must themselves be cleaned regularly to prevent contamination of clean areas. Magnification unknown.
Model release not required. Property release not required.