1. Department of Microbiology, University of Nigeria, Nsukka, Enugu State, Nigeria
2. Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria
3. Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Skara, Sweden
4. Department of Clinical Veterinary and Animal Science, University of Copenhagen, Frederiksberg, Denmark
5. Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, Sweden
6. The Rural Economy and Agricultural Society Sjuhärad, Länghem, Sweden