Investigation and Management of a Small Outbreak of Septic Knee Arthritis Following Knee Arthroscopy by Stenotrophomonas maltophilia
Abstract
Knee septic arthritis caused by Stenotrophomonas maltophilia (S. maltophilia) was very rare in immunocompetent group but was observed in a series of post-arthroscopy patients in our hospital. This study aimed to report the clinical course and treatments of the infections and the investigation of the incidents. One patient who underwent knee arthroscopy exhibited serious knee septic arthritis 17 days postoperatively. Later, three more similar patients were also suspected of knee infection. Investigation was initiated by interviews with personnel and reviews of medical records. All instruments associated with arthroscopy were subsequently sampled and tested. While no abnormalities were revealed in medical personnel and records, positive culture of S. maltophilia was found on one arthroscope, used in all four infected patients. No violations were found in sterilization processes. The contaminated arthroscope was proven loss of airtightness subsequently. For infection treatment, double or triple therapy of levofloxacin, sulfamethoxazole-trimethoprim, and minocycline was administered, with additional debridement performed in one patient. By retrospective survey, another three patients were suspected of infection out of the total 19 patients who underwent knee arthroscopy in last 4 weeks. After intervention, all involved patients recovered. Although S. maltophilia is a rare cause of knee septic arthritis, it can still occur and even lead to nosocomial outbreaks through…
How strong is the evidence?
Evidence Hub reads this as a case report, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health. Reported size: 19 participants or records.
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