Stenotrophomonas maltophilia

Stenotrophomonas maltophilia


See 'Additional Information'

General 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

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

May require contact precautions.

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