1. Department of Microbiology and Immunology, Faculty of Medicine, University of Zawia, Zawiya QP7X+536, Libya
2. Division of Microbiology, Institute for Animal Health, Compton, Newbury RG20 7NN, United Kingdom
3. The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian EH25 9RG, United Kingdom
4. Department of Respiratory Sciences, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom