has been suppressed by pyocyanin
and recurrence of the Candida sp.
The most common virulence genes detected among the all 61 isolates were algD and lasB (98%), followed by toxA (80%), exoS and exoU (33), and 87% were positive for pyocyanin
QS regulates the production of a blue pigment called pyocyanin
reduced cell viability by ~30% (Figure 7).
are able to produce phenazine and phenazine derivatives, pyocyanin
, phenazine- l-carboxamide, phenazine-l-carboxylic acid, 2, 4 DAPG and other antibiotics when grown aerobically in phosphate-poor medium (Watson et al., 2005).
These metabolites include phenazine, pyocyanin
, paerucumarin, pyoverdine, pyochelin, hydrogen cyanide, AHLs, rhamnolipids, phenylacetic acid, and macrolide antibiotics.
Raney, "Two simple media for the demonstration of pyocyanin
and fluorescin," The Journal of Laboratory and Clinical Medicine, vol.
Pseudomonas aeruginosa pyocyanin
directly oxidizes glutathione and decreases its levels in airway epithelial cells.
secreted by Pseudomonas aeruginosa 7NSK2 triggers systemic resistance to Magnaporthe grisea but enhances Rhizoctonia soiani susceptibility in rice.
Three other isolates (isolate 1, 4 and 5) showed Gram--negative, non endospore forming rods, produced a yellowgreen pigment (pyocyanin
) and fluoresce under UV light and they were assigned to the genus Pseudomonas (Table 1, 2).
The strains P.aeruginosae were variable in relation to formation of pyocyanin
, urease, protease, fibrinolytic and hemolytic of activity.
Pseudomonas aeruginosa commonly produces two soluble pigments: pyocyanin
, which gives colonies a blue color and pyoverdin, also known as the fluorescent pigment, which is a yellow-green or yellow-brown pigment.