| urinary and intestinal schistosomiasis in the tono irrigation scheme, kassena/nankana district, upper east region, ghana. | human- and snail-related aspects of transmission of urinary and intestinal schistosomiasis were studied in the tono irrigation scheme in northern ghana. the scheme became operational in 1977. in some schools, prevalences and intensities of both schistosoma mansoni and s. haematobium infection were alarmingly high, pointing to human schistosomiasis being at least focally a health problem of major public health concern. positive correlations between intensity of schistosome infection, as measured ... | 1994 | 7716395 |