Spatial and environmental correlates of organism colonization and infection in the neonatal intensive care unit

Area of Science:

• Neonatal Intensive Care Unit (NICU) infections
• Environmental microbiology
• Healthcare epidemiology

Background:

• Neonatal intensive care units (NICUs) are critical environments for vulnerable infants.
• Understanding factors contributing to organism colonization and infection in NICUs is crucial for patient safety.

Purpose of the Study:

• To investigate the impact of environmental and spatial factors on organism colonization and infection within the NICU.
• To assess the relationship between infant location in the NICU and specific infection/colonization outcomes.

Main Methods:

• Retrospective cohort study of 11,428 infants admitted between 2006 and 2015.
• Analysis of four outcomes: MRSA colonization, late-onset sepsis, and endotracheal tube colonization with P. aeruginosa or K. pneumoniae.
• Use of mixed-effects logistic regression and Moran's I for spatial autocorrelation to identify risk factors.

Main Results:

• All four studied outcomes demonstrated statistically significant spatial clustering by location within the NICU.
• Neighboring infant colonization was found to influence the risk of MRSA colonization (p < 0.05).
• Infants in NICU locations with more space for medical equipment had 2.61 times the odds of P. aeruginosa colonization (95% CrI: 1.19, 5.78).

Conclusions:

• Extrinsic environmental and spatial factors partially explain the risk of neonatal colonization and infection.
• Targeted infection prevention strategies in NICU areas with ample equipment space may reduce future P. aeruginosa colonization.