1. Department of Production Animal Studies, Faculty of Veterinary ScienceUniversity of Pretoria Onderstepoort South Africa
2. Poultry Disease Management AgencySouth African Poultry Association (SAPA) Johannesburg South Africa
3. Veterinary Public Health UnitDepartment of Agriculture Forestry and Fisheries (DAFF), Pretoria South Africa
4. Residue LaboratoryOndersterpoort Veterinary Research Onderstepoort South Africa
5. Randox Food Diagnostics, Ltd. London UK