 stenotrophomonas maltophilia outbreak with a commercial blood gas injector as the culprit and interventions for source and prevention a possible passage between patient and ecmo water heater device this article describes an outbreak of stenotrophomonas maltophilia involving over 100 patients infected in a tertiary hospital in turkey the authors concluded that a contaminated commercial needless blood gas injector was responsible for the outbreak and noted device safety concerns stemming from detection of s maltophilia in extracorporeal membrane oxygenation ecmo water heater devices 