Most common, and most serious cause of infection by pseudomonas is seen in patients with

→ P.aeruginosa is pathogenic only indicated into areas devoid of normal defences e.g. when mucous membrane is disrupted, patient is catheterized, neutropenia is there. → Most common, and most serious cause of infection is burns. → Most common infection outside hospital is suppurative otitis media . → Causative agent of shanghai fever. → Produce blue pus, with characteristic fruity odour  → Pathognomonic skin lesions are called ecthyma gangrenosum, which occur singly or in small numbers on the perineum, buttocks, and extremities. → Resistant to common antiseptic and disinfectants such as Dettol  in contrary, it may grow profusely in bottle of these antiseptic.