West Nile Fever,
France
Information received on 24/09/2020 from Dr Loic Evain, Directeur Général adjoint, CVO, Direction générale de l'alimentation, Ministère de l'Agriculture et de l'Alimentation, Paris, France
Summary
Report type Follow-up report No. 1
Date of start of the event 12/08/2020
Date of confirmation of the event 26/08/2020
Report date 24/09/2020
Date submitted to OIE 24/09/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 01/12/2019
Manifestation of disease Clinical disease
Causal agent West Nile virus
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (26/08/2020)
Follow-up report No. 1 (24/09/2020)
Follow-up report No. 2 (14/10/2020)
New outbreaks (2)
Outbreak 1 (2020-02) LA CRAU, LA CRAU, Var
Date of start of the outbreak 03/09/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 75 1 0 0 0
Affected population An equidae in a horse riding club shows hyperthermia and paresis which has led to ataxia. The animal remained in the department but made a one-day movement to the neighboring department.
Outbreak 2 (2020-03) ALISTRO, ALISTRO, Haute-Corse
Date of start of the outbreak 03/09/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 7 1 0 1 0
Affected population In a private stable, a horse lying down with paralyzed hindquarters and unable to stand up, also shows tachycardia, red mucous membranes, associated with dehydration. The horse was euthanized.
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 82 2 0 1 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Equidae 2.44% 0.00% 0.00% 1.22%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Control of vectors
  • 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
Anses – Animal health laboratory, Maisons-alfort (National laboratory) Equidae IgM-capture ELISA 23/09/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations