Hyperendemic human fascioliasis in Andean valleys: An altitudinal transect analysis in children of Cajamarca province, Peru

► Fascioliasis survey of school children from rural localities in Cajamarca, Peru. ► Very high prevalences and intensities were the highest so far recorded in the area. ► Fascioliasis coinfection with protozoans and other helminths was the rule. ► Fascioliasis prevalence showed a significant correlation with altitude. ► Results suggest that human fascioliasis may be widespread throughout that area.