West Nile Fever,
Brazil
Information received on 23/07/2019 from Dr Geraldo Marcos De Moraes, Director, Departamento de Salud Animal e Insumos Pecuarios, Ministerio de Agricultura,Ganadería y Abastecimiento, Brasilia , Brazil
Summary
Report type Immediate notification
Date of start of the event 11/06/2019
Date of confirmation of the event 19/07/2019
Report date 23/07/2019
Date submitted to OIE 23/07/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 05/12/2018
Manifestation of disease Clinical disease
Causal agent West Nile virus
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 (32031300055) João Neiva, Espirito Santo
Date of start of the outbreak 11/06/2019
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 6 1 1 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 6 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Equidae 16.67% 16.67% 100.00% 16.67%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Vectors
Epidemiological comments The outbreak was detected from surveillance actions for nervous syndrome in herbivores. Initially, the sample was tested for herbivores rabies and, in the face of negative results, it was tested for West Nile virus. The official veterinary service continues to investigate cases of mortality of equidae associated with neurological signs.
Control measures
Measures applied
  • Surveillance within 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
Federal Laboratory for Agricultural Defense - LFDA/MG (National laboratory) Equidae gene sequencing 19/07/2019 Positive
Federal Laboratory for Agricultural Defense - LFDA/MG (National laboratory) Equidae reverse transcription - polymerase chain reaction (RT-PCR) 15/07/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations