Pyocyanin is the blue pigment of Pseudomonas aeruginosa. I have never seen
anything else with a blue pigment (in over 30 years).
Yellow pigments are more common.
> I have a general Microbiology question. Is there any other bacterium
> other than Pseudomonas spp. that produces the yellow-blue pigment when
> grown on agar plates? I have discovered a contamination in the
> laboratory and the colonies are releasing a bluish substance (possibly
> pyoverdin) into the agar. Could this be a bacterium other than a
> species of Pseudomonas?
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