| soil-transmitted helminth infections at very high altitude in bolivia. | a cross-sectional study of soil-transmitted helminthiases in the northern bolivian altiplano was carried out over the 6-year period 1992-97. prevalences, intensities and associations were analysed from coprological results obtained in 31 surveys (28 in schools and 3 in individuals of all age-groups) performed in 24 aymara communities located between the city of la paz and lake titicaca, at an altitude of 3800-4200 m. ascaris lumbricoides and trichuris trichiura were detected, with local prevalen ... | 2001 | 11490995 |