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This is an SEM micrograph of a Biofilm. The biofilm was created by a bacterial colony which formed on a silicon device. A small colony of spherical Cocci type bacteria can be seen forming on the surface of this well developed biofilm. The biofilm is an adhesive matrix excreted by the colony of bacteria living on the device. The film is a polymeric compound called EPS (Extracellular Polymeric Substance). If you look carefully at the edge of the biofilm, you can see spherical Cocci type bacteria. Some researchers suggest that a polymeric matrix such as this one can play a role in the antibiotic resistant nature of some bacterial infections.

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