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Five years of hospital based surveillance of influenza-like illness and influenza in a short-stay geriatric unit

Abstract : Background Data on influenza in the healthcare setting are often based on retrospective investigations of outbreaks and a few studies described influenza during several consecutive seasons. The aim of the present work is to report data on influenza like illness (ILI) and influenza from 5-year prospective surveillance in a short-stay geriatrics unit. Findings A short stay geriatrics unit underwent 5 years of ILI surveillance from November 2004 to March 2009, with the aim of describing ILI in a non-outbreak context. The study was proposed to patients who presented ILI, defined as fever >37.8°C or cough or sore throat. Among 1,353 admitted patients, 115 presented an ILI, and 34 had hospital-acquired ILI (HA-ILI). Influenza was confirmed in 23 patients, 13 of whom had been vaccinated. Overall attack rates were 2.78% and 0.02% for HA-ILI and HA-confirmed influenza respectively, during the 5 seasons. Conclusions This 5-year surveillance study supports the notion that influenza infections are common in hospitals, mostly impacting the elderly hospitalized in short-stay units. It highlights the need for appropriate control measures to prevent HA-ILI in geriatric units and protect elderly patients.
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https://hal-univ-lyon1.archives-ouvertes.fr/hal-02045103
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Submitted on : Thursday, February 21, 2019 - 6:09:37 PM
Last modification on : Sunday, October 25, 2020 - 7:05:01 AM

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Corinne Régis, Nicolas Voirin, Vanessa Escuret, Byeul-A Kim, Olivier Robert, et al.. Five years of hospital based surveillance of influenza-like illness and influenza in a short-stay geriatric unit. BMC Research Notes, BioMed Central, 2014, 7, pp.99. ⟨10.1186/1756-0500-7-99⟩. ⟨hal-02045103⟩

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