West Nile Fever,
Information received on 07/12/2018 from Dr Malek Zrelli, Directeur Général, Direction Générale des Services Vétérinaires, Ministère de l'Agriculture, Tunis, Tunisia
Report type Immediate notification
Date of start of the event 12/11/2018
Date of confirmation of the event 05/12/2018
Report date 07/12/2018
Date submitted to OIE 07/12/2018
Date event resolved 17/01/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 23/11/2015
Manifestation of disease Sub-clinical infection
Causal agent West Nile virus
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (07/12/2018)
Follow-up report No. 1 (22/01/2019)
New outbreaks (1)
Outbreak 1 Zaouiet Sousse, Zaouiet Sousse, Zaouiet Ksiba Thrayet, Sousse
Date of start of the outbreak 12/11/2018
Outbreak status Resolved (17/01/2019)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 13 7 0 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 13 7 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Equidae 53.85% 0.00% 0.00% 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Following human cases of West Nile fever in this area, an active investigation among equidae within this area was carried out. The results were positive, indicating a recent infection without showing any clinical signs.
Control measures
Measures applied
  • Control of vectors
  • Surveillance within containment and/or protection zone
  • Surveillance outside containment and/or protection zone
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Experimental Zooprophylactic Institute of Abruzzo and Molise "G. Caporale" (OIE Reference Laboratory) Equidae seroneutralization test (SNT) 05/12/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations