1. Bacteriology DivisionARC‐Onderstepoort Veterinary Research Pretoria South Africa
2. Department of Agriculture and Animal HealthScience Campus, University of South Africa Florida South Africa
3. Department of AgricultureForestry and Fisheries, Directorate of Veterinary Public Health Pretoria South Africa
4. Biometry DivisionAgricultural Research Council Corporate Office Pretoria South Africa
5. Department of Biochemistry and Microbiology, Faculty of Science and AgricultureUniversity of Zululand KwaDlangezwa South Africa