Nosocomial outbreak due to Listeria monocytlogenes in a neonatal unit

Introduction: Description of an outbreak of Listeria monocytogenes in a neonatal intensive care unit. Methods: A questionnaire, environmental investigation and molecular study were performed. Results: We identified a nosocomial outbreak of L monocytogenes, confirmed by the genetic study, in a neonatal intensive care unit. Three infants were affected. Although the transmission mechanism could not be elucidated, cross-infection was strongly suggested. Conclusion: Adherence to universal hygiene standards is necessary to avoid nosocomial outbreaks. (C) 2011 Elsevier Espana, S.L. All rights reserved.