Transmission of Mycobacterium chimaera from Heater–Cooler Units during Cardiac Surgery despite an Ultraclean Air Ventilation System
Published Date:Jun 15 2016
Source:Emerg Infect Dis. 22(6):1008-1013.
Airborne Transmission Pathway
Cardiac Surgical Procedures
Surgical Wound Infection
Transmission Of Mycobacterium Chimaera From Heater–Cooler Units During Cardiac Surgery Despite An Ultraclean Air Ventilation System
Tuberculosis And Other Mycobacteria
Pubmed Central ID:PMC4880077
Description:Heater-cooler units (HCUs) were recently identified as a source of Mycobacterium chimaera causing surgical site infections. We investigated transmission of this bacterium from HCUs to the surgical field by using a thermic anemometer and particle counter, videotape of an operating room equipped with an ultraclean laminar airflow ventilation system, and bacterial culture sedimentation plates in a nonventilated room. Smoke from the HCU reached the surgical field in 23 s by merging with ultraclean air. The HCU produced on average 5.2, 139, and 14.8 particles/min in the surgical field at positions Off, On/oriented toward, and On/oriented away, respectively. Culture plates were positive for M. chimaera <5 m from the HCU in the test room. These experiments confirm airborne transmission of M. chimaera aerosols from a contaminated HCU to an open surgical field despite ultraclean air ventilation. Efforts to mitigate infectious risks during surgery should consider contamination from water sources and airflow-generating devices.
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