Abstract
Multidrug resistant infections are a challenge in the health care setting and a cause of patient morbidity and mortality. Bacteriophages (phages) are viruses that target and kill bacteria and have been used in patients to treat bacterial infections. We present a case of disseminated Stenotrophomonas maltophilia infection, with pulmonary, intra-abdominal and bloodstream involvement. The patient was treated with a combination of antibiotics and personalized phage therapy, administered daily for 12 days both intravenously as well as via intra-abdominal drains. Phage therapy was well-tolerated, the patient cleared S. maltophilia from their bloodstream and their intra-abdominal abscesses were stable or decreased in size. However, the intra-abdominal fluid cultures remained positive for S. maltophilia. Unfortunately, the patient passed away 2 months after completion of phage therapy due to multiorgan failure. These data highlight the difficulty of treating critically ill patients and clearing complex, biofilm mediated infections, even with phages. More information is needed regarding the optimal treatment protocols for phage therapy in complex multifocal infections.
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