Interventions to reduce risk of transmission of infections from sinks and other wastewater drainage sites.

BACKGROUND: Hospital wastewater systems, particularly sinks and drainage plumbing, are increasingly recognized as reservoirs for opportunistic pathogens and potential sources of healthcare-associated infections. However, the overall burden of water-associated transmission and effective mitigation strategies remain incompletely defined. METHODS: We reviewed current evidence describing reservoirs, transmission pathways, and interventions aimed at reducing pathogen contamination associated with hospital sinks and wastewater drainage systems. Evidence from outbreak investigations, systematic reviews, and recent intervention studies was summarized. RESULTS: Hospital sinks provide a favorable environment for microbial persistence due to biofilm formation within plumbing components such as tailpipes and P-traps. Multiple mechanisms may facilitate transmission from sink drains to patients, including splash contamination and contamination of nearby equipment. Existing evidence supporting mitigation strategies remains limited and heterogeneous. Interventions evaluated include engineering modifications, point-of-use water filtration, sink removal, and targeted drain disinfection. Foam-based disinfectant delivery may improve contact between disinfectants and internal plumbing surfaces and has been associated with reductions in sink colonization by clinically relevant pathogens. CONCLUSIONS: Hospital sinks and wastewater systems are important environmental reservoirs for opportunistic pathogens. A combination of engineering, environmental, and behavioral strategies are required to reduce the risk of sink-associated transmission in healthcare settings.

Duke Scholars

Author Bobby Warren  

Author Deverick John Anderson Medicine, Infectious Diseases