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Table 1 Characteristics of influenza-like illness surveillance system in Tunisia

From: Evaluation of the influenza-like illness surveillance system in Tunisia, 2012–2015

Surveillance characteristics ILI Surveillance
Syndrome Influenza-like Illness (ILI)
Case definition before 2014 Outpatient with:
• fever (38 °C)
• and cough or sore throat
• and onset less than five days prior to presentation
• in the absence of a specific diagnosis
Case definition after 2014 Acute respiratory infection with:
• measured fever (≥ 38 °C)
• and cough
• and onset within the past 10 days
Catchment population Out-patient
Sites specialties Primary Health Care Centers
Number of sentinel sites Before 2014: 268 sites
After 2014: 113 sites*
Geographic scope 24 governorates (all the country)
Coordinating body Primary Health Care Direction:
National Influenza Program
Specimen Collection Nasopharyngeal swabs
Surveillance objectives •Detection of influenza activity
• Identification of circulating respiratory viruses
• Identifying viruses for vaccine selection
• Planning vaccination activities for prevention
  1. *Based on the assessment of a national steering committee of expert that considered the staff motivation and the site effective contribution to surveillance without compromising representativeness