Serum levels of immuno-globulin G, A, M, D and E were determined using
single radial immune-diffusion technique in 52 Nigerian primary schoo
l children with urinary schistosomiasis and 39 age and sex matched con
trols, The mean values of IgA, IgM and IgE in the school children with
S. haematobium infection were significantly higher than in controls.
These findings suggest that urinary schistosomiasis in these subjects
was in the acute stage.