1. Department of Microbiology
2. Australian Research Council Centre of Excellence in Structural and Functional Microbial Genomics, Monash University, Clayton, Vic 3800, Australia
3. CSIRO Livestock Industries, Australian Animal Health Laboratory, Geelong, Vic 3220, Australia
4. Australian Poultry Cooperative Research Centre, Armidale, NSW 2315, Australia
5. Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium