Transmission of 2009 pandemic influenza A (H1N1) virus among healthcare personnel-Southern California, 2009
Auteur Jenifer L Jaeger
Auteur Minal Patel
Auteur Nila Dharan
Auteur Kathy Hancock
Auteur Elissa Meites
Auteur Christine Mattson
Auteur Matt Gladden
Auteur David Sugerman
Auteur Saumil Doshi
Auteur Dianna Blau
Auteur Kathleen Harriman
Auteur Melissa Whaley
Auteur Hong Sun
Auteur Michele Ginsberg
Auteur Annie S Kao
Auteur Paula Kriner
Auteur Stephen Lindstrom
Auteur Seema Jain
Auteur Jacqueline Katz
Auteur Lyn Finelli
Auteur Sonja J Olsen
Auteur Alexander J Kallen
Résumé OBJECTIVE In April 2009, 2009 pandemic influenza A (H1N1) (hereafter, pH1N1) virus was identified in California, which caused widespread illness throughout the United States. We evaluated pH1N1 transmission among exposed healthcare personnel (HCP) and assessed the use and effectiveness of personal protective equipment (PPE) early in the outbreak. DESIGN Cohort study. SETTING Two hospitals and 1 outpatient clinic in Southern California during March 28-April 24, 2009. PARTICIPANTS Sixty-three HCP exposed to 6 of the first 8 cases of laboratory-confirmed pH1N1 in the United States. METHODS Baseline and follow-up questionnaires were used to collect demographic, epidemiologic, and clinical data. Paired serum samples were obtained to test for pH1N1-specific antibodies by microneutralization and hemagglutination-inhibition assays. Serology results were compared with HCP work setting, role, and self-reported PPE use. RESULTS Possible healthcare-associated pH1N1 transmission was identified in 9 (14%) of 63 exposed HCP; 6 (67%) of 9 seropositive HCP had asymptomatic infection. The highest attack rates occurred among outpatient HCP (6/19 [32%]) and among allied health staff (eg, technicians; 8/33 [24%]). Use of mask or N95 respirator was associated with remaining seronegative ([Formula: see text]). Adherence to PPE recommendations for preventing transmission of influenza virus and other respiratory pathogens was inadequate, particularly in outpatient settings. CONCLUSIONS pH1N1 transmission likely occurred in healthcare settings early in the pandemic associated with inadequate PPE use. Organizational support for a comprehensive approach to infectious hazards, including infection prevention training for inpatient- and outpatient-based HCP, is essential to improve HCP and patient safety.
Publication Infection Control and Hospital Epidemiology: The Official Journal of the Society of Hospital Epidemiologists of America
Volume 32
Numéro 12
Pages 1149-1157
Date Dec 2011
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doi:10.1086/662709
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