| control of intestinal helminths in schoolchildren in low-napo, ecuador: impact of a two-year chemotherapy program. | a school-based control program of intestinal helminths was undertaken among schoolchildren in the low-napo region, north-eastern ecuador. forty-eight percent of children were infected with one or more helminths at the first examination. the prevalence at the baseline was ascaris 33.2% followed by hookworm 24.1% and trichuris 6.5%. sex was found to be a significant factor influencing the prevalence of hookworm and trichuris. prevalence was compared 9 months and 18 months after treatment. after 9 ... | 2000 | 10881121 |