Pseudomonas Aeruginosa

 Pseudomonas aeruginosa is among those gram negative rods that are obligatory aerobes (non-fermenters) the most frequently isolated bacterium. It is a major cause of nosocomial infections, where IV fluids, ophthalmic solutions, hydrotherapy reservoirs, respiratory equipment and even disinfectant solutions such as quaternary ammonium compounds are frequently contaminated. This organism may be spread from patient to patient by the hands of hospital personnel in the absence of strict hand-washing protocols. Another important source of infection is organisms that have colonized the host to become a part of the respiratory and gastrointestinal tract microbiota. Five-to-10% of healthy patients may carry Pseudomonas aeruginosa in their gastrointestinal tract, but this percentage increases in hospitalized patients due to selective antibiotic pressure.

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