Absence of fasciolid
eggs in stools by Kato-Katz and formalin-ether coprologic methods and lack of sonographic abnormalities were explained by the illness's early invasive phase, and negative serologic results were explained by the immunologic response heterogeneity in fascioliasis (4) or antigen deterioration.
Restriction enzyme mapping of ribosomal DNA can distinguish between Fasciolid
(liver fluke) species.
The study group consisted of 70 adult patients from the barangay (local government unit of 50-100 families) of Libertad, for whom fasciolid
infections had been noted on previous surveys.