1. CIRAD, UMR 53 PVBMT CIRAD-Université de la Réunion, Pôle de Protection des Plantes, Ligne Paradis, 97410 Saint Pierre, La Réunion, France
2. Electron Microscope Unit, University of Cape Town, Private Bag, Rondebosch 7701, South Africa
3. School of Biological Science, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
4. Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory 7925, South Africa