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Formerly named Pseudomonas
Must distinguish colonization from clinically significant infection.
May be acquired from diverse environmental sources (e.g. tap water).
Bronchiectatics may be colonized (i.e. CF patients).
Most common reason for isolation is colonization of the respiratory tract.
Most common true infections:
Other manifestations rare:
True pneumonia more likely in ICU and oncology patients, those with advanced age and after/during treatment with broad spectrum antimicrobial use.
Risk factors: