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Biofilm on Silicon Substrate

Biofilm on Substrate

This is an SEM micrograph of a biofilm that formed on a silicon substrate. The right portion shows the silicon device, and the left region shows the biofilm. The biofilm has been peeled up to reveal the underlying silicon. Close examination of the silicon surface reveals several cocci type bacteria, and a white blood cell. It is unclear what mechanism triggered the formation of the biofilm. It is possible that the presence of the bacteria led to white blood cells finding the bacteria, and the white blood cells triggering the body to encapsulate the device in a biofilm. An alternate explanation is that the white blood cells found the silicon surface, and that alone triggered the biofilm. A third possible explanation would be that the biofilm is actually formed by a more well developed bacteria colony.

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