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© Michel Huerre
Coupe histologique de foie de patient atteint d'une hépatite C chronique active avec infiltrat (opacité) folliculaire (lymphocytes) (Grossissement X 400). L'hépatite C chronique peut être à l'origine de cirrhose et cancer du foie
Publication : Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin

Performance of influenza case definitions for influenza community surveillance: based on the French influenza surveillance network GROG, 2009-2014

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin - 06 Apr 2017

Casalegno JS, Eibach D, Valette M, Enouf V, Daviaud I, Behillil S, Vabret A, Soulary JC, Benchaib M, Cohen JM, van der Werf S, Mosnier A, Lina B

Link to Pubmed [PMID] – 28422004

Euro Surveill. 2017 Apr;22(14)

International case definitions recommended by the Centers for Disease Control and Prevention (CDC), the European Centre for Disease Prevention and Control (ECDC), and the World Health Organization (WHO) are commonly used for influenza surveillance. We evaluated clinical factors associated with the laboratory-confirmed diagnosis of influenza and the performance of these influenza case definitions by using a complete dataset of 14,994 patients with acute respiratory infection (ARI) from whom a specimen was collected between August 2009 and April 2014 by the Groupes Régionaux d’Observation de la Grippe (GROG), a French national influenza surveillance network. Cough and fever ≥ 39 °C most accurately predicted an influenza infection in all age groups. Several other symptoms were associated with an increased risk of influenza (headache, weakness, myalgia, coryza) or decreased risk (adenopathy, pharyngitis, shortness of breath, otitis/otalgia, bronchitis/ bronchiolitis), but not throughout all age groups. The WHO case definition for influenza-like illness (ILI) had the highest specificity with 21.4%, while the ECDC ILI case definition had the highest sensitivity with 96.1%. The diagnosis among children younger than 5 years remains challenging. The study compared the performance of clinical influenza definitions based on outpatient surveillance and will contribute to improving the comparability of data shared at international level.

https://www.ncbi.nlm.nih.gov/pubmed/28422004