All of the following are protective factors of the skin and its secretions EXCEPT pyocyanin production.
- The Gram negative bacterium Pseudomonas aeruginosa produces and secretes a number of toxic compounds, including pyrocyanin (PCN). Pyocyanin is a blue secondary metabolite that turns red below pH 4.9 and has the ability to oxidize and reduce other molecules, killing microbes competing with P.
- The only gram-negative bacillus capable of producing the water-soluble pigment pyocyanin is Pseudomonas aeruginosa.
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