| prevalence of intestinal parasite infections on a national scale among primary schoolchildren in laos. | in order to investigate the epidemiological situation of intestinal parasite infections in laos, parasitological surveys were carried out on a national scale including 17 provinces and the vientiane municipality. a total of 29,846 stool specimens were collected from primary schoolchildren from may 2000 to june 2002 and examined once with the cellophane thick smear technique. the cumulative egg positive rate for intestinal helminths was 61.9%. by species, the rate for ascaris lumbricoides was 34. ... | 2003 | 14574555 |