| prevalence and spatial distribution of intestinal parasitic infections in a rural amazonian settlement, acre state, brazil. | a population-based survey of the prevalence and spatial distribution of intestinal parasitism was carried out in an agricultural settlement in the amazon basin of brazil (granada, acre state). more than half (53.4%) of the 429 stool specimens from subjects in all age groups, living in 113 households, had cysts, ova, or larvae of intestinal parasites. the most prevalent parasites were giardia duodenalis (19.6%) and soil-transmitted helminths (12.7%); 105 (24.5%) subjects were infected with more t ... | 2007 | 17221092 |