the antigens were evaluated with 121 sera from subjects in costa rica , south africa , taiwan , thailand and the usa , 49 of the sera being from cases of amoebic liver abscess , 41 from symptomatic intestinal amoebiasis , 19 from asymptomatic intestinal amoebiasis , and 12 from subjects presumed not to have amoebiasis .
C0023886
of amoebic liver abscess
C0002438
amoebiasis