ELISA antibodies to cysticerci of Taenia solium in human populations in New Guinea, Oceania, and Southeast Asia.

The presence of ELISA antibodies to cysticerci of Taenia solium was surveyed in populations of New Guinea, Micronesia, and several areas of Southeast Asia. It is confirmed that cysticercosis in New Guinea remains limited to the primary Wissel Lakes focus in Irian Jaya, where the disease was introduced by the importation of infected pigs, and that it has not spread to populations east or south of the Wissel Lakes, or to Papua New Guinea. On the island of Bali, Indonesia, 21% of sera were positive from one village where pigs are especially numerous, whereas in Sumatra, Indonesia, only 3%-4% of sera were positive. In Singapore, there was a higher proportion of positive sera among the Chinese (13%) than among the Indian (5%) or Malay (3%) Moslems. From 3 to 13% of sera from populations in Micronesia, Burma, Vietnam, and the Philippines were also found to react with cysticercus antigen. However, the problem of incomplete ELISA specificity raises the possibility that in areas not known to be endemic for T. solium, seropositive results could represent either subclinical infection with cysticerci or crossreactivity to other parasitic infections.