Original Investigation

Prospective Whole-Genome Sequencing to Identify Bacterial Transmission and Its Modifiers in Neonates

JAMA Network Open 10.1001/jamanetworkopen.2025.41409

November 21, 2025 at 11:00 AM EST

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Can prospective whole-genome sequencing identify bacterial transmission events and associated factors in a neonatal intensive care unit?In this cohort study, 51.8% of participants were colonized with at least 1 bacterial strain with antibiotic resistance or epidemic potential, and 34.0% of colonizations were linked to transmission. Increased full-time nurse staffing and prior antibiotic exposure were associated with a lower risk of transmission-linked colonization, while vascular catheter use was associated with an increased risk.This study suggests that whole-genome sequencing can identify bacterial transmission events and help identify modifying factors for colonization in newborn infants in intensive care.

Corresponding Author: Philipp Henneke, MD, Institute for Infection Prevention and Control, Medical Center–University of Freiburg, Breisacher Straße 115 b, 3. OG, 79106 Freiburg, Germany (philipp.henneke@uniklinik-freiburg.de).

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