1975
DOI: 10.1099/00222615-8-1-199
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Brown- and Red-Pigmented Pseudomonas Aeruginosa: Differentiation Between Melanin and Pyorubrin

Abstract: PLATE XI1WE have recently isolated from clinical material three strains of Pseudomonas aeruginosa that produced a brown pigment which diffused through agar. Pigmentation varied in intensity from light brown to a deep coffee colour. Perusal of several standard microbiology textbooks and a survey of the literature left us uncertain whether this pigment was one of those occasionally produced by P. aeruginosa, namely pyorubrin and pyomelanin. Consequently, we sought to obtain for comparative purposes strains of th… Show more

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Cited by 42 publications
(31 citation statements)
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“…Nowadays, the polymer is considered allomelanin although the original paper doubted about the melanin-like nature of that product as it was formed without the involvement of a polyphenol oxidase [138]. Similar data were reported with some Pseudomonas [142,143] due to a reduced 4-hydroxyphenylpyruvate dioxygenase activity, and the pigment is considered pyomelanin [144].…”
Section: Bacterial Melaninsupporting
confidence: 66%
“…Nowadays, the polymer is considered allomelanin although the original paper doubted about the melanin-like nature of that product as it was formed without the involvement of a polyphenol oxidase [138]. Similar data were reported with some Pseudomonas [142,143] due to a reduced 4-hydroxyphenylpyruvate dioxygenase activity, and the pigment is considered pyomelanin [144].…”
Section: Bacterial Melaninsupporting
confidence: 66%
“…Pyomelanin production was detected on plates containing 0.7% K 2 HPO 4 , 0.3% KH 2 PO 4 , 0.05% trisodium citrate, 0.01% MgSO 4 , 0.1% (NH 4 ) 2 SO 4 , 0.2% glucose, and 1% L-tyrosine (26). Auxotrophs were detected by stamping colonies from TSB plates onto minimal salts medium plates with 0.2% glucose (27).…”
Section: Methodsmentioning
confidence: 99%
“…This pigment appears to be melaninlike according to preliminary tests performed as suggested for any melanin pigment (25,27,46). Production of melanin pigments by bacteria has been reported for species within several genera, including Rhizobium (6, 7), Pseudomonas (13,30), Micrococcus (27), Gluconobacter (34), Mycobacterium (36), and Azotobacter (41). The brownish black pigment exhibited in most bacteria has been partially characterized and suggested to be melanins (18).…”
mentioning
confidence: 99%