The dot-enzyme-linked immunosorbent assay was used to detect Cysticercus cellulosae antibodies in sera of patients with neurocysticercosis. Among 108 confirmed cases of neurocysticercosis 81.6-96.1% showed positive reactions. Two out of 54 normal control sera reacted at a serum dilution of 1:20, but none at a 1:40 (range 40-640). No cross reactions were observed with sera from cases of paragonimiasis and clonorchiasis, but it did occur to some extent with sera from cases of echinococcosis and cerebrovascular diseases. The results indicated that the dot-ELISA was sensitive, specific and economic for the diagnosis of neurocysticercosis.