Acknowledgments: We express our special thanks to inhabitants of Karondang for their willingness to participate in this survey for many years. The study would not have been feasible without the great efforts and enthusiasm of A. Jalil, village head of Karondang. We thank S. Syukur, Dr. M. Risal, and other staff of the District Health Center (PUSKESMAS) Babana for their technical assistance during the entire study period. Infrastructure for fieldwork was provided by the Communicable Disease Center (Makassar, Sulawesi). Fieldwork assistance by Jan Willem Koot, Jolanda Gelderblomden Hartog, Yvonne Hoeksma-Kruize, Yvonne Ruiterman, Selma Jonkers, and Vincent Dézentjé is greatly appreciated.
Financial support: This study was supported by the Netherlands Foundation for the Advancement of Tropical Research (WOTRO, grant no. W93-242).
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Authors’ addresses: A. J. Terhell, M. Haarbrink, A. van den Biggelaar, E. Sartono, and M. Yazdanbakhsh, Department of Parasitology, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands, Telephone: 31-71-526-5067, Fax: 31-71-526-6907, E-mail: