| intestinal parasitic infections in hill-tribe schoolchildren in chiang mai, northern thailand. | 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 lumbricoi ... | 2003 | 19230577 |