| parasitic infections in black children in an endemic schistosomiasis area in natal. | urine and stool specimens from 856 school children aged from 7 to 20 years, and from 80 preschool children, were examined for schistosoma haematobium and intestinal helminths and protozoa. s. haematobium was present in 57% with a peak of 81% in 13-14-year-old children. peak intensity preceded peak incidence and egg loads gradually decreased with age. there was no clear-cut difference between boys and girls with regard to intestinal parasites, nor was there a close correlation between the inciden ... | 1977 | 191941 |