A cluster of three extrapulmonary infections linked to well-maintained water-based heater-cooler devices.

Background: Various water-based heater-cooler devices (HCDs) have been implicated in nontuberculous mycobacteria outbreaks. Ongoing rigorous surveillance for healthcare-associated (HA-Mab) put in place following a prior institutional outbreak of alerted investigators to a cluster of 3 extrapulmonary infections among patients who had undergone cardiothoracic surgery.

Methods: Investigators convened a multidisciplinary team and launched a comprehensive investigation to identify potential sources of in the healthcare setting.