cc:
Dr. Duong Socheat, CNM, Phnom Penh
Dr. Cheam Saem, PHD,Kratie
Dr. Nguon Sim An,PHD, Kampong Cham
Dr. Heng Nhoeu, PHD, Stung Treng
Dr. Stefan Hoyer, WHO, Phnom Penh
Dr. Peter Odermatt, MSF, Phnom Penh
Prof. K. Kiikuni,SMHF, Tokyo
Prof. K. Yasuraoka, SMHF, Tokyo
Table 1 Summary of results of serological and malacological surveys conducted in April-May 1999
