1. Pseudomonas aeruginosa Microscopical features
Pseudomonas aeruginosa is a gram-negative.
Strict aerobic non fermentive.
rod measuring 0.5 to 0.8 µm belonging to the bacterial family Pseudomonadaceae.
Motile by polar flagella
Capsulated (mucoid).

2. Cultural (Macroscopically) features:
Three types of colonies Large smooth colony, small rough colony, mucoid colony,
usually grow on usual media such as nutrient, blood agar has very simple nutritional requirements.
Identification of P. aeruginosa often includes identifying the production of both pyocyanin and fluorescein.
Its optimum temperature for growth is 37°C, and it is able to grow at temperatures as high as 42°C.
Aerobic.

7. General Features
It is often observed "growing in distilled water" which is evidence of its minimal nutritional needs, taps, mops.
It is resistant to high concentrations of salts and dyes, weak antiseptics, and many commonly used antibiotics.

9. Diseases Pseudomonas aeruginosa is an opportunistic pathogen, causing
UTI,
dermatitis, soft tissue infections,
RTI and cystic fibrosis.
bacteremia,
bone and joint infections,
gastrointestinal infections
variety of systemic infections, particularly in patients with severe burns and in cancer and AIDS patients who are immunosuppressed..

10. Pseudomonas aeruginosa is nosocomial pathogen; its infection is a serious problem in patients hospitalized with cancer, cystic fibrosis and burns. The case fatality rate in these patients is 50% .
externa ("Swimmer's ear"), otitis in which P.aeruginosa causes 35-70%.
They also cause eye infections as perulent conjunctivitis, keratitis, corneal ulcer .

17. Treatment
Usually double or triple antibiotics are given since it has high resistant to antibiotics.
Carbencilline, Ticarcillin usually used with gentamicin.