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Bacteria use chat to play the 'prisoner's dilemma' game in deciding their fate

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Art of science: extremely small, incredibly close

Bacteria biofilm Fernan Federici, Tim Rudge, PJ Steiner and Jim Haseloff Scale: ******* This is Bacillus subtilis, a rod-shaped bacterium commonly found in soil.

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A) Bacillus subtilis, (B) Staphlococcus aureus and (C) Escherichia coli were grown on BHI media with varying concentrations of NaCl (0.85%, 5%, 7.5%, 10%, and 20%) at 37 degrees C for 24 hrs.