1. School for Environmental Research, Charles Darwin University, Darwin, Northern Territory, Australia.
2. Tropical and Emerging Infectious Diseases Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.
3. Medical Entomology Branch, Centre for Disease Control, Northern Territory Department of Health and Community Services, Darwin, Northern Territory, Australia.
4. Northern Territory Clinical School, Royal Darwin Hospital, Darwin, Northern Territory, Australia.