Journal
PEDIATRIC CRITICAL CARE MEDICINE
Volume 12, Issue 6, Pages E282-E286Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/PCC.0b013e31820ac42a
Keywords
health care associated infection; mechanical ventilation; neonate; oscillator; Serratia marcescens
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Objective: To interrupt transmission of Serratia marcescens colonization in a neonatal intensive care unit and determine the source of ongoing transmission. Design: Multidisciplinary outbreak investigation and simulation of droplet generation by a high-frequency oscillator using fluorescent dye. Setting: Level III neonatal intensive care unit. Patients: Very low birth weight premature infants with respiratory failure. Interventions: Infection control interventions, pulsed-field gel electrophoresis of isolates to determine relatedness, and construction of a scavenging system to capture the circuitry condensate expelled by the oscillator exit port. Measurements and Main Results: Affected infants were housed in the same geographic site. Serratia marcescens isolates were indistinguishable or closely related using pulsed-field gel electrophoresis. Fluorescent droplet splatter from the circuitry, generated when no containment device covered the exit valve, was visible up to 49 in (107.8 cm) from the source. Conclusions: Implementation and adherence to infection control measures is essential to prevent transmission of opportunistic pathogens among ventilated infants. Oscillators can generate droplets that travel farther than 1 m from the source. (Pediatr Crit Care Med 2011; 12:e282-e286)
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