 Some of the genera known to produce phenazines include "Pseudomonas" spp., "Streptomyces" spp., and "Pantoea agglomerans".These phenazine natural products have been implicated in the virulence and competitive fitness of producing organisms.For example, the phenazine pyocyanin produced by "Pseudomonas aeruginosa" contributes to its ability to colonise the lungs of cystic fibrosis patients.