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Definition of healthcare-associated influenza: A review and results from an international survey.
Influenza Other Respir Viruses. 2017 Sep;11(5):367-371
Authors: Munier-Marion E, Bénet T, Vanhems P
Abstract
AIM: To describe definitions of healthcare-associated influenza (HAI) in recent literature and in hospitals participating in a survey of Society for Healthcare Epidemiology of America (SHEA) Research Network (SRN) members.
METHOD: A review with PubMed search was undertaken to retrieve articles published between 2008 and 2016, focusing on the subject headings "influenza, human" and "cross infection." Definitions of clinical influenza-like illness (ILI) and HAI were identified. An invitation to participate in the survey was sent to 218 SRN members via email.
RESULTS: Of 75 articles on HAI included in the review, 30 presented a standardized definition of clinical ILI based on fever (100%), cough (80%), and sore throat (70%). Forty studies (53%) contained a standardized HAI definition, grounded on threshold delay from admission in 29 of them, this delay ranging from 48 to 196 hour (median: 72 hour). Fifty-five SRN members responded to the survey, with a standardized definition of HAI adopted by 76% of them. This definition was based on clinical features for 24%, virological features for 31%, and both for 45%. Fever (mean threshold: 38.0°C) was part of the definition for 82%. The features required most frequently in the clinical definition were cough (46%) and sore throat (26%). Median threshold delay between admission and symptoms onset adopted for HAI definition was 48 hour (range: 24-96 hour).
CONCLUSION: This work underlined the heterogeneity of HAI definitions in different countries. A standardized definition would be helpful to evaluate HAI spread, outcomes in patients and healthcare systems, and the impact of prevention measures, including vaccination.
PMID: 28646615 [PubMed - indexed for MEDLINE]
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