Pseudomonas aeruginosa
A gram negative aerobic bacillus bacterium considered by many as a facultative anaerobic (can growth at aerobic or anaerobic conditions).
Characteristic of Pseudomonas aeruginosa is the production of a green color pigment so called “pyocyanin”.
Although is considered as a weak pathogenic for humans and animals, some strains are resistant to antibiotics and disinfectants.
It is one of the main pathogens isolated from nosocomial infections (opportunistic human pathogen).