1. Department of Infectious Diseases, Central Clinical School Monash University Melbourne Vic. Australia
2. Department of Biological Sciences Macquarie University NSW 2109 Australia
3. School of Animal and Veterinary Sciences University of Adelaide SA 5371 Australia
4. Institut Pasteur Université de Paris, Biodiversity and Epidemiology of Bacterial Pathogens Paris France
5. Department of Bioengineering University of California San Diego CA
6. Department of Infection Biology London School of Hygiene and Tropical Medicine London UK