1. Department of Production Animal Studies, Faculty of Veterinary Science University of Pretoria Onderstepoort South Africa
2. Department of Veterinary Public Health and Preventive Medicine College of Veterinary Medicine, Michael Okpara University of Agriculture Umudike Nigeria
3. Department of Basic Veterinary Sciences School of Veterinary Medicine, Faculty of Medical Sciences, University of the West Indies St. Augustine Trinidad and Tobago
4. School of Public Health, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
5. Agricultural Research Council—Onderstepoort Veterinary Research Onderstepoort South Africa
6. Department of Biochemistry & Microbiology University of Zululand KwaDlangezwa South Africa