Stenotrophomonas maltophilia


See 'Additional Information'
See 'Additional Information'

General Information

Pathogen information

Aerobic non-fermenting gram negative rod


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

Bronchiectatics may be colonized (i.e. CF patients).

Must distinguish colonization from clinically significant infection.

Associated syndromes

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

Most common true infections:

  • Blood stream infection (usually from vascular catheter)

  • Pneumonia

Other manifestations rare:

  • Endocarditis

  • Sinusitis

  • Cellulitis

Additional Information

May require contact precautions if highly resistant.

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