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South Africa - 1 new outbreak of Rift Valley fever in sheep on farm, Letsemeng, Free State (OIE, May 16, 2018)

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  • South Africa - 1 new outbreak of Rift Valley fever in sheep on farm, Letsemeng, Free State (OIE, May 16, 2018)

    Rift Valley fever,
    South Africa
    Information received on 16/05/2018 from Dr Bothle Michael Modisane, Chief Director , Department of Agriculture, Forestry and Fisheries, Animal Production and Health, PRETORIA, South Africa
    Summary
    Report type Immediate notification
    Date of start of the event 28/04/2018
    Date of confirmation of the event 16/05/2018
    Report date 16/05/2018
    Date submitted to OIE 16/05/2018
    Reason for notification Recurrence of a listed disease
    Date of previous occurrence 30/08/2011
    Manifestation of disease Clinical disease
    Causal agent Rift Valley fever virus
    Nature of diagnosis Clinical, Laboratory (advanced), Necropsy
    This event pertains to a defined zone within the country
    New outbreaks (1)
    Outbreak 1 (RVF_2018_001) RVF_2018_001, Letsemeng, Free State
    Date of start of the outbreak 28/04/2018
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Sheep 600 250 250 0 0
    Summary of outbreaks Total outbreaks: 1
    Total animals affected
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Sheep 600 250 250 0 0
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Sheep 41.67% 41.67% 100.00% 41.67%
    *Removed from the susceptible population through death, destruction and/or slaughter
    Epidemiology
    Source of the outbreak(s) or origin of infection
    • Vectors
    Epidemiological comments Coordinates modified to protect confidentiality as required by South African Legislation.
    Control measures
    Measures applied
    • Vaccination permitted (if a vaccine exists)
    • No treatment of affected animals
    Measures to be applied
    • Vaccination in response to the outbreak (s)
    • Screening
    • Quarantine
    Diagnostic test results
    Laboratory name and type Species Test Test date Result
    IDEXX Laboratories (Private Laboratory) Sheep immunohistochemical test 16/05/2018 Positive
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
    ...
    http://www.oie.int/wahis_2/public/wa...reportid=26639
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
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