Outbreak of Pseudomonas aeruginosa surgical site infections after arthroscopic procedures: Texas, 2009

Pritish K. Tosh, Maureen Disbot, Jonathan M. Duffy, Marc L. Boom, Gary Heseltine, Arjun Srinivasan, Carolyn V. Gould, Sandra I. Berríos-Torres

Research output: Contribution to journalReview article

55 Scopus citations

Abstract

Setting. Seven organ/space surgical site infections (SSIs) that occurred after arthroscopic procedures and were due to Pseudomonas aeruginosa of indistinguishable pulsed-field gel electrophoresis (PFGE) patterns occurred at hospital X in Texas from April 22, 2009, through May 7, 2009. Objective. To determine the source of the outbreak and prevent future infections. Design. Infection control observations and a case-control study. Methods. Laboratoryrecordswerereviewedforcasefinding.Acase-controlstudywasconducted.Acasepatientwasdefinedassomeone who underwent knee or shoulder arthroscopy at hospital X during the outbreak period and subsequently developed organ/space SSI due to P. Aeruginosa. Cultures of environmental and surgical equipment samples were performed, and selected isolates were analyzed by PFGE. Surgical instrument reprocessing practices were reviewed, and surgical instrument lumens were inspected with a borescope after reprocessing to assess cleanliness. Results. The case-control study did not identify any significant patient-related or operator-related risk factors. P. aeruginosa grew from 62 of 388 environmental samples. An isolate from the gross decontamination sink had a PFGE pattern that was indistinguishable from that of the case patient isolates. All surgical instrument cultures showed no growth. Endoscopic evaluation of reprocessed arthroscopic equipment revealed retained tissue in the lumen of both the inflow/outflow cannulae and arthroscopic shaver handpiece. No additional cases occurred after changes in instrument reprocessing protocols were implemented. After this outbreak, the US Food and Drug Administration released a safety alert about the concern regarding retained tissue within arthroscopic shavers. Conclusions. These SSIs were likely related to surgical instrument contamination withP.aeruginosaduringinstrumentreprocessing. Retained tissue in inflow/outflow cannulae and shaver handpieces could have allowed bacteria to survive sterilization procedures.

Original languageEnglish (US)
Pages (from-to)1179-1186
Number of pages8
JournalInfection Control and Hospital Epidemiology
Volume32
Issue number12
DOIs
StatePublished - Dec 2011

ASJC Scopus subject areas

  • Epidemiology
  • Microbiology (medical)
  • Infectious Diseases

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