title: Intestinal parasitic infections in hill-tribe schoolchildren in Chiang Mai, northern Thailand.
abstract: We surveyed intestinal parasitic infections in hill-tribe schoolchildren residing permanently in Chiang Mai Province. The positive rate, of 403 stool specimens examined using the formalin-ether sedimentation technique, was 48.9%. No significant difference between male (50.8%) and female (47.1%) students was found for the infection. The most common protozoa was Entamoeba coli (40.9%), followed by Giardia lamblia (14.9%). The most common helminth was hookworm (13.4%), followed by Ascaris lumbricoides (8.0%), and Trichuris trichiura (6.9%). Opisthorchis viverrini, the most important liver fluke infection in northern Thailand, was found in only 1.5%. Children harbored 1-5 species of parasites, with the most being single infections (67.5%), followed by double infections (26.9%). This finding promoted an urgent need for the treatment of infected schoolchildren, and the prevention of re-infection must be underlined.
authors.affiliation: Department of Parasitology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Somsak
authors.initials: S
authors.lastname: Piangjai
authors.forename: Kom
authors.initials: K
authors.lastname: Sukontason
authors.forename: Kabkaew L
authors.initials: KL
authors.lastname: Sukontason
mesh_terms: D000293:Adolescent; D000818:Animals; D002648:Child; D005260:Female; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology* / Q000469:parasitology; D008297:Male; D015995:Prevalence; D013785:Thailand