Xanthan from bacterium Xanthomonas

The oil price rises in the 1970s stimulated interest in Enhanced Oil Recovery (EOR), and fairly rapidly the biopolymer xanthan, the extracellular polysaccharide from the bacterium Xanthomonas campestris. an organism which normally resides on cabbage leaves, was identified as a leading contender as a viscosifier for polymer enhanced water flooding. 

It is hydrophilic, anionic-bacterial heteropolysaccharide. Xanthan gum can be obtained from the fermentation of the gram-negative bacterium Xanthomonas campestris (8). 

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