Stenotrophomonas maltophilia


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General Information

Aerobic non-fermenting gram negative rod

May be acquired from diverse environmental sources (i.e. tap water).

Patients with chronic lung disease may be colonized (i.e. CF patients or patients with chronic tracheotomies).

Must distinguish colonization from clinically significant infection

Most common reason for isolation is colonization of the respiratory tract.

Most common true infections - blood stream infection (usually from vascular catheter) and pneumonia.

Other manifestations rare (endocarditis)

May require contact precautions

True pneumonia more likely in ICU and oncology patients, and after/during treatment with broad spectrum antimicrobial use.