An unwashed human palm was imprinted on a nutrient medium (3% agar gel with beef bouillon and blue food coloring) on a large black plate and then covered with another plate. Several days later,the bacteria transferred from the palm onto the agar started to grow and form colonies. Thus the imprint shows that there had been bacteria present on the palm. It also shows that it is important to wash one's hands to prevent infection | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / SciMAT |
Taille de l’image : | 3573 px × 2592 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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