1. Pathobiology School of Veterinary Science, Massey University, Palmerston North 4442, New Zealand
2. Molecular Epidemiology Laboratory, School of Veterinary Science, Massey University, Palmerston North 4442, New Zealand
3. Robinsons Veterinary Clinic, Feilding 4702, New Zealand
4. Massey Genome Service, Massey University, Palmerston North 4442, New Zealand