[1]Department of Parasitology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.;
[2]Directorate of Health Services, Sri Lanka Air Force, Colombo, Sri Lanka.;
[3]Anti-Malaria Campaign, Ministry of Health, 555/5 Public Health Complex, Narahenpita, Colombo S, Sri Lanka.;
[1]Department of Parasitology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.;
[1]Department of Parasitology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.;
[4]Department of Pathology, School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia.;
[3]Anti-Malaria Campaign, Ministry of Health, 555/5 Public Health Complex, Narahenpita, Colombo S, Sri Lanka.;
[5]Department of Public Health, Faculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka.;