Risks of liver and spleen enlargement in schistosomiasis mansoni infection in a rural Zambian community.

At the Tropical Diseases Research Centre, Ndola, Zambia, we have used "relative risks" to demonstrate the relationship between intensity of Schistosoma mansoni infection and liver and spleen enlargement. There was a significant trend in risk for both right and left lobe liver enlargement across the intensity strata. However the risk for spleen enlargement showed no significant trend.