Stenotrophomonas spp.

Stenotrophomonas spp. is a genus of motile, Gram-negative, aerobic rod-shaped bacteria, which includes at least several species. They belong to the group of non-fermenting bacteria (non-fermenters).

Stenotrophomonas spp., particularly the dominant species stenotrophomonas maltophilia, cause increased nosocomial infection, particularly in patients who have been prescribed antibiotics for a prolonged period. The following diseases, among others, can be caused by this pathogen:

  • Pneumonia

  • Bacteremia

  • Infections of the skin and soft tissues

Stenotrophomonas spp. are distributed worldwide, particularly in the soil, sewage, and plants. Some of them are known biofilm formers.

Relevance of pathogen in transmission in endoscopy

  • Gastroenterology: Not relevant

  • Pulmonology: High

  • Ear, nose, and throat: Not relevant

  • Urology: Not relevant

Relevance for endoscope surveillance

  • High concern organism

Transmission route

Transmission occurs primarily through contaminated water.

Stenotrophomonas spp. can also be spread and transmitted via water in healthcare facilities. The water used for final rinsing of endoscopes must therefore be microbiologically controlled.

Resistance to antibiotics

Stenotrophomonas spp. (particularly stenotrophomonas maltophilia) are resistant to numerous antibiotics, including beta-lactams, aminoglycosides, and quinolones.

Sources and further readings

  1. Cosgrove S. et al. Caveat emptor: the role of suboptimal bronchoscope repair practices by a third-party vendor in a pseudo-outbreak of pseudomonas in bronchoalveolar lavage specimens. Infect Control Hosp Epidemiol 2012; 33: 224–229.

  2. Hygienemaßnahmen bei Infektionen oder Besiedlung mit multiresistenten gramnegativen Stäbchen, Empfehlung der Kommission für Krankenhaushygiene und Infektionsprävention (KRINKO) beim Robert Koch-Institut (RKI), Bundesgesundheitsbl 2012 · 55:1311–1354.

  3. Ryan, R et al. The versatility and adaptation of bacteria from the genus Stenotrophomonas, Nat Rev Microbiol 7, 514–525 (2009).

  4. Wang Y. et al. Antimicrobial Resistance in Stenotrophomonas spp. Microbiol Spectr 2018 Jan;6(1).