[1] Univ Pretoria, Dept Prod Anim Studies, Pretoria, South Africa
[2] Fed Univ Agr, Coll Vet Med, Dept Vet Microbiol & Parasitol, Abeokuta, Nigeria
[3] Univ Pretoria, Dept Paraclin Sci, Pretoria, South Africa
[4] Univ South Africa, Coll Sci Engn & Technol, Dept Stat, Johannesburg, South Africa
[5] Usmanu Danfodiyo Univ, Fac Vet Med, Dept Publ Hlth & Prevent Med, Sokoto, Nigeria
[6] Agr Res Council, Onderstepoort Vet Res, Pretoria, South Africa
[7] Fed Coll Anim Hlth & Prod Technol, Dept Anim Hlth, Ibadan, Nigeria
[8] Fed Univ Agr, Coll Vet Med, Dept Vet Publ Hlth & Reprod, Abeokuta, Nigeria
[9] Food & Agr Org United Nat, Emergency Ctr Transboundary Anim Dis, Dar Es Salaam, Tanzania
[10] Univ Pretoria, Dept Vet Trop Dis, Pretoria, South Africa