schistosomiasis malayensis-like infection among the penan and other interior tribes (orang ulu) in upper rejang river basin sarawak malaysia. | a serosurvey of various indigenous interior tribes (orang ulu) in upper rejang river basin sarawak malaysia, the site of a multibillion ringgit hydroelectric power project, found 6.8% of the individual surveyed were seropositive for schistosomiasis, as determined by elisa method using the soluble egg antigen of schistosoma malayensis baling strain. in all age group, the seroprevalence rate is higher (9.5%) in males than in females (4.5%) except for the 31-40 age group. seroprevalence of schistos ... | 2001 | 11485090 |