1. Malaria and Arbovirus Unit, The Queensland Institute of Medical Research, PO Royal Brisbane Hospital, Brisbane 4029, Australia,
2. Department of Parasitology, The University of Queensland, St. Lucia 4067, Australia,
3. Department of Microbiology, The University of Melbourne, Parkville 3052, Australia,
4. Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA