Browsing Production Animal Studies by Author "Van Helden, Lesley Susan"

Browsing Production Animal Studies by Author "Van Helden, Lesley Susan"

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  • Establishing post‐outbreak freedom from African horse sickness virus in South Africa's surveillance zone 
    Grewar, John Duncan; Sergeant, Evan S.; Weyer, Camilla Theresa; Van Helden, Lesley Susan; Parker, Beverley Joan; Anthony, Tasneem; Thompson, P.N. (Peter N.) (Wiley, 2019-11)
    An African horse sickness (AHS) outbreak occurred in South Africa's AHS controlled area in autumn 2016. A freedom from disease survey was performed to establish the likelihood of ongoing circulation of the associated virus ...
  • A field investigation of an African horse sickness outbreak in the controlled area of South Africa in 2016 
    Grewar, John Duncan; Weyer, Camilla Theresa; Venter, Gert Johannes; Van Helden, Lesley Susan; Burger, Phillippa; Guthrie, Alan John; Coetzee, Peter; Labuschagne, Karien; Buhrmann, Gary; Parker, Beverley Joan; Thompson, P.N. (Peter N.) (Wiley, 2019-03)
    An outbreak of African horse sickness (AHS) caused by AHS virus type 1 occurred within the South African AHS surveillance zone during April and May 2016. The index case was detected by a private veterinarian through passive ...