Received January 14, 1998; Accepted February 02, 1998.
A small-scale epidemiological survey was undertaken on the residents along the Mekong River near Pakse, Laos, to know the status of helminthic infections. A total of 137 fecal samples were collected from the staffs of the provincial government, their family, and primary schoolchildren in Pakse City, Champassak Province, and examined by Kato-Katz smear technique. The overall helminth positive rate was 75.9%, and the helminths detected were Opisthorchis viverrini (43.8%). Ascaris lumbricoides (26.3%), Trichuris trichiura (19.0%), hookworms (19.0%), Strongyloides stercoralis (2.2%), Taenia sp. (0.7%), and Schistosoma mekongi (1.5%). To obtain the adult worm of the liver fluke, three infected persons were treated with praziquantel and purged with magnesium sulfate. Five, 10, and 395 adult flukes, respectively, were collected from their diarrheic stools, all of which were morphologically identified as O. viverrini. The results represent that the liver fluke and soil-transmitted helminths are highly prevalent, and the life cycle of S. mekongi is likely to be maintained in this area.
Fig. 1 Map showing the surveyed area (arrow: Pakse, Laos)
Table 1 Results of fecal examination of the provincial staffs, their family, and schoolchildren near Pakse City, Laos).
Kobayashi J, Vannachone B, Xeutvongsa A, Manivang K, Ogawa S, Sato Y, Pholsena K. Prevalence of intestinal parasitic infection among children in two villages in Lao PDR. Southeast Asian J Trop Med Public Health 1996;27(3):562–565.
Pholsena K, Sayaseng B, Hongvanthong B, Vanisaveth V. The prevalence of helminth infection in Ban Nanin, Laos. Southeast Asian J Trop Med Public Health 1991;22(1):137–138.
Sornmani S. Current status of schistosomiasis in Laos, Thailand and Malaysia. Southeast Asian J Trop Med Public Health 1976;7(2):149–154.
Sornmani S, Pathammavong O, Bunnag T, Impand P, Intrakhao C, Thirachantra S. An epidemiological survey of human intestinal parasites in Vientiane, Laos. Southeast Asian J Trop Med Public Health 1974;5(4):541–546.
Wittes R, MacLean JD, Law C, Lough JO. Three cases of schistosomiasis mekongi from northern Laos. Am J Trop Med Hyg 1984;33(6):1159–1165.
c/o Department of Parasitology and Tropical Medicine Seoul National University College of Medicine Seoul 110-799, Korea
Tel : +82-2-740-8348 Fax : +82-2-765-6142 E-mail: email@example.com